1835
Pathway
Hydrogen Sulfide Biosynthesis I
Many bacteria can produce hydrogen sulfide, which can be used as defense system against antibiotics and oxidative stress. This pathway is one of the hydrogen sulfide biosynthesis pathways (totally two). L-Cysteine is transported by L-cysteine ABC transporter and convert to 3-mercaptopyruvic acid by facilitation of aspartate aminotransferase. 3-Mercaptopyruvic acid is later catalyzed to form pyruvic acid and hydrogen sulfide by 3-mercaptopyruvate sulfurtransferase.
Metabolic
PW002066
Center
PathwayVisualizationContext2353
1853
1900
#000099
PathwayVisualization1819
1835
Hydrogen Sulfide Biosynthesis I
Many bacteria can produce hydrogen sulfide, which can be used as defense system against antibiotics and oxidative stress. This pathway is one of the hydrogen sulfide biosynthesis pathways (totally two). L-Cysteine is transported by L-cysteine ABC transporter and convert to 3-mercaptopyruvic acid by facilitation of aspartate aminotransferase. 3-Mercaptopyruvic acid is later catalyzed to form pyruvic acid and hydrogen sulfide by 3-mercaptopyruvate sulfurtransferase.
Metabolic
3
109940
564
SubPathway
109487
1827
Compound
3843
3299028
Barrett EL, Clark MA: Tetrathionate reduction and production of hydrogen sulfide from thiosulfate. Microbiol Rev. 1987 Jun;51(2):192-205.
1835
Pathway
1
Cell
CL:0000000
6
Myocyte
CL:0000187
5
Hepatocyte
CL:0000182
3
Neuron
CL:0000540
2
Platelet
CL:0000233
4
Cardiomyocyte
CL:0000746
8
Beta cell
CL:0000639
7
Epithelial Cell
CL:0000066
1
Homo sapiens
9606
Eukaryote
Human
3
Escherichia coli
562
Prokaryote
17
Rattus norvegicus
10116
Eukaryote
Rat
12
Mus musculus
10090
Eukaryote
Mouse
24
Solanum lycopersicum
4081
Eukaryote
Tomato
18
Saccharomyces cerevisiae
4932
Eukaryote
Yeast
21
Xenopus laevis
8355
Eukaryote
African clawed frog
4
Arabidopsis thaliana
3702
Eukaryote
Thale cress
49
Bathymodiolus platifrons
220390
Eukaryote
Deep sea mussel
60
Nitzschia sp.
0001
Eukaryote
Nitzschia4
5
Bos taurus
9913
Eukaryote
Cattle
10
Drosophila melanogaster
7227
Eukaryote
Fruit fly
6
Caenorhabditis elegans
6239
Eukaryote
Roundworm
25
Escherichia coli (strain K12)
83333
Prokaryote
23
Pseudomonas aeruginosa
287
Prokaryote
2
Bacteria
2
Prokaryote
Bacteria
19
Schizosaccharomyces pombe
4896
Eukaryote
29
Saccharomyces cerevisiae (strain ATCC 204508 / S288c)
559292
Eukaryote
Baker's yeast
1
Cytosol
GO:0005829
2
Mitochondrion
GO:0005739
3
Mitochondrial Matrix
GO:0005759
5
Cytoplasm
GO:0005737
13
Endoplasmic Reticulum
GO:0005783
24
Mitochondrial Intermembrane Space
GO:0005758
4
Peroxisome
GO:0005777
10
Cell Membrane
GO:0005886
35
Chloroplast
GO:0009507
6
Lysosome
GO:0005764
11
Extracellular Space
GO:0005615
31
Periplasmic Space
GO:0005620
34
Plant-Type Vacuole
GO:0000325
7
Endoplasmic Reticulum Membrane
GO:0005789
12
Mitochondrial Inner Membrane
GO:0005743
14
Mitochondrial Outer Membrane
GO:0005741
15
Nucleus
GO:0005634
27
Peroxisome Membrane
GO:0005778
32
Inner Membrane
GO:0070258
16
Lysosomal Lumen
GO:0043202
18
Melanosome Membrane
GO:0033162
25
Golgi apparatus
GO:0005794
20
Endoplasmic Reticulum Lumen
GO:0005788
21
Synapse
GO:0045202
36
Membrane
GO:0016020
53
Endoplasmic Reticulum Body
GO:0010168
40
Periplasm
GO:0042597
19
sarcoplasmic reticulum
GO:0016529
1
Liver
BTO:0000759
72
9
9
Muscle
BTO:0000887
141
18
24
Brain
BTO:0000142
89
16
2
Endothelium
BTO:0000393
7
Nervous System
BTO:0001484
18
Pancreas
BTO:0000988
25
Intestine
BTO:0000648
8
Blood Vessel
BTO:0001102
74
11
4
Adrenal Medulla
BTO:0000049
71
8
28
Stomach
BTO:0001307
155
26
11
Heart
BTO:0000562
73
10
2
1
1
1
PW_BS000002
3
2
1
1
PW_BS000003
4
3
1
1
PW_BS000004
8
5
1
1
PW_BS000008
18
13
1
1
PW_BS000018
31
1
5
1
1
PW_BS000031
42
24
1
1
PW_BS000042
5
4
1
1
PW_BS000005
50
9
5
1
6
PW_BS000050
26
1
1
1
5
PW_BS000026
54
1
3
1
5
PW_BS000054
103
3
3
1
PW_BS000103
117
1
3
1
PW_BS000117
118
1
17
1
PW_BS000118
132
1
12
1
PW_BS000132
147
1
24
1
PW_BS000147
155
3
24
1
PW_BS000155
157
2
24
1
PW_BS000157
161
3
18
1
PW_BS000161
178
3
21
1
PW_BS000178
85
24
10
1
1
PW_BS000085
222
3
4
1
PW_BS000024
224
2
4
1
PW_BS000024
151
1
4
1
PW_BS000151
225
35
4
1
PW_BS000024
220
1
4
PW_BS000024
198
5
18
1
PW_BS000024
289
2
49
1
PW_BS000024
253
5
4
1
PW_BS000024
133
3
12
1
PW_BS000133
111
5
12
1
PW_BS000111
112
2
12
1
PW_BS000112
129
1
5
12
1
PW_BS000129
345
24
12
1
PW_BS000028
346
9
5
12
6
PW_BS000028
327
1
1
12
5
PW_BS000028
347
1
3
12
5
PW_BS000028
334
4
12
1
PW_BS000028
368
3
60
1
PW_BS000028
135
5
17
1
PW_BS000135
94
3
PW_BS000094
406
3
5
1
PW_BS000115
124
1
5
1
PW_BS000124
407
2
5
1
PW_BS000115
122
5
5
1
PW_BS000122
414
1
5
5
1
PW_BS000115
418
24
5
1
PW_BS000115
408
4
5
1
PW_BS000115
423
9
5
5
6
PW_BS000115
424
1
1
5
5
PW_BS000115
425
1
3
5
5
PW_BS000115
120
3
17
1
PW_BS000120
119
2
17
1
PW_BS000119
450
1
5
17
1
PW_BS000115
454
24
17
1
PW_BS000115
374
4
17
1
PW_BS000053
458
9
5
17
6
PW_BS000115
459
1
1
17
5
PW_BS000115
460
1
3
17
5
PW_BS000115
479
3
10
1
PW_BS000115
299
1
10
1
PW_BS000024
481
2
10
1
PW_BS000115
297
5
10
1
PW_BS000024
489
24
10
1
PW_BS000115
482
4
10
1
PW_BS000115
501
3
6
1
PW_BS000115
388
1
6
1
PW_BS000112
206
2
6
1
PW_BS000024
205
5
6
1
PW_BS000024
506
24
6
1
PW_BS000115
502
4
6
1
PW_BS000115
9
6
1
1
PW_BS000009
15
11
1
PW_BS000015
101
5
3
1
PW_BS000101
108
1
3
PW_BS000108
107
31
3
PW_BS000107
188
1
18
PW_BS000024
160
1
18
1
PW_BS000160
227
34
4
1
PW_BS000024
281
1
25
1
PW_BS000024
315
1
23
PW_BS000024
322
1
23
1
PW_BS000024
113
6
12
1
PW_BS000113
126
6
5
1
PW_BS000126
443
6
17
1
PW_BS000115
1
1
PW_BS000001
14
10
1
PW_BS000014
105
11
3
PW_BS000105
187
31
18
PW_BS000024
72
5
1
3
PW_BS000072
71
11
1
3
PW_BS000071
207
6
6
1
PW_BS000024
290
5
49
1
PW_BS000024
318
31
23
PW_BS000024
320
11
23
PW_BS000024
301
6
10
1
PW_BS000024
95
1
7
2
1
PW_BS000095
156
12
24
1
PW_BS000156
177
1
21
1
PW_BS000177
249
13
4
1
PW_BS000024
367
1
60
1
PW_BS000028
121
12
17
1
PW_BS000121
16
2
1
2
PW_BS000016
22
14
1
1
PW_BS000022
13
1
2
1
PW_BS000013
32
1
15
1
5
PW_BS000032
39
7
1
1
3
PW_BS000039
10
1
7
1
1
PW_BS000010
49
7
1
1
PW_BS000049
58
1
14
1
1
PW_BS000058
59
27
1
1
PW_BS000059
27
15
1
PW_BS000027
46
1
1
4
PW_BS000046
29
1
1
1
PW_BS000029
66
18
5
1
8
PW_BS000066
61
25
1
7
PW_BS000061
51
8
1
PW_BS000051
23
15
1
1
PW_BS000023
91
8
5
1
1
PW_BS000091
89
2
PW_BS000089
7
1
1
PW_BS000007
97
1
5
2
1
PW_BS000097
100
5
2
1
PW_BS000100
104
14
3
1
PW_BS000104
143
1
5
19
1
PW_BS000143
146
5
19
1
PW_BS000146
166
1
1
PW_BS000166
199
14
18
1
PW_BS000024
210
13
18
1
PW_BS000024
213
7
18
1
PW_BS000024
211
10
18
PW_BS000024
216
4
18
1
PW_BS000024
217
15
18
PW_BS000024
218
15
18
1
PW_BS000024
163
2
18
1
PW_BS000163
190
11
18
PW_BS000024
277
1
2
18
PW_BS000024
170
18
PW_BS000170
164
4
PW_BS000164
285
10
4
1
PW_BS000024
226
4
4
1
PW_BS000024
223
12
4
1
PW_BS000024
308
10
1
1
PW_BS000024
134
12
12
1
PW_BS000134
329
14
12
1
PW_BS000028
333
1
2
12
PW_BS000028
336
1
12
1
PW_BS000028
332
1
7
12
1
PW_BS000028
350
1
14
12
1
PW_BS000028
128
15
12
1
PW_BS000128
351
15
12
PW_BS000028
353
25
12
7
PW_BS000028
335
27
12
1
PW_BS000028
115
10
12
PW_BS000115
130
13
12
1
PW_BS000130
331
7
12
1
PW_BS000028
184
1
2
1
PW_BS000024
109
32
3
PW_BS000109
382
14
5
1
PW_BS000100
412
1
2
5
PW_BS000115
429
1
5
1
PW_BS000115
123
1
7
5
1
PW_BS000123
433
1
14
5
1
PW_BS000115
410
15
5
1
PW_BS000115
125
13
5
1
PW_BS000125
383
7
5
1
PW_BS000100
405
10
5
PW_BS000115
422
27
5
1
PW_BS000115
435
15
5
PW_BS000115
399
14
17
1
PW_BS000113
446
1
2
17
PW_BS000115
464
1
17
1
PW_BS000115
447
1
7
17
1
PW_BS000115
468
1
14
17
1
PW_BS000115
444
15
17
1
PW_BS000115
136
13
17
1
PW_BS000136
398
7
17
1
PW_BS000113
376
10
17
PW_BS000053
472
25
17
7
PW_BS000115
375
27
17
1
PW_BS000053
470
15
17
PW_BS000115
484
14
10
1
PW_BS000115
485
15
10
1
PW_BS000115
300
13
10
1
PW_BS000024
495
7
10
1
PW_BS000115
478
10
10
PW_BS000115
491
27
10
1
PW_BS000115
499
15
10
PW_BS000115
389
14
6
1
PW_BS000112
516
15
6
1
PW_BS000115
395
13
6
1
PW_BS000113
390
7
6
1
PW_BS000112
209
10
6
PW_BS000024
508
27
6
1
PW_BS000115
517
15
6
PW_BS000115
28
1
16
1
1
PW_BS000028
20
4
1
1
1
PW_BS000020
33
18
1
1
PW_BS000033
43
25
1
1
PW_BS000043
24
4
10
1
1
PW_BS000024
60
25
1
PW_BS000060
17
12
1
1
PW_BS000017
70
28
5
1
1
PW_BS000070
36
1
20
1
1
PW_BS000036
37
7
21
1
3
PW_BS000037
93
25
20
1
1
PW_BS000093
110
2
3
1
PW_BS000110
127
1
16
5
1
PW_BS000127
114
11
12
PW_BS000114
6
1
3
1
PW_BS000006
140
10
3
PW_BS000140
159
24
PW_BS000159
180
2
21
1
PW_BS000180
152
8
4
PW_BS000152
214
25
18
1
PW_BS000024
215
6
18
1
PW_BS000024
212
1
7
18
1
PW_BS000024
162
12
18
1
PW_BS000162
286
36
4
1
PW_BS000024
287
53
4
1
PW_BS000024
65
11
1
PW_BS000065
291
6
49
1
PW_BS000024
292
4
49
1
PW_BS000024
298
1
7
10
1
PW_BS000024
302
1
16
10
1
PW_BS000024
294
11
4
1
PW_BS000024
293
4
1
PW_BS000024
337
1
16
12
1
PW_BS000028
341
4
1
12
1
PW_BS000028
343
18
12
1
PW_BS000028
352
25
12
PW_BS000028
356
25
12
1
PW_BS000028
360
4
10
12
1
PW_BS000028
370
2
60
1
PW_BS000028
228
36
1
PW_BS000024
384
12
5
1
PW_BS000100
391
12
6
1
PW_BS000112
232
40
3
PW_BS000024
409
11
5
PW_BS000115
415
18
5
1
PW_BS000115
419
25
5
1
PW_BS000115
434
4
10
5
1
PW_BS000115
436
25
5
PW_BS000115
137
11
17
PW_BS000137
448
1
16
17
1
PW_BS000115
451
18
17
1
PW_BS000115
455
25
17
1
PW_BS000115
469
4
10
17
1
PW_BS000115
471
25
17
PW_BS000115
483
11
10
PW_BS000115
487
18
10
1
PW_BS000115
490
25
10
1
PW_BS000115
480
12
10
1
PW_BS000115
208
11
6
PW_BS000024
504
18
6
1
PW_BS000115
507
25
6
1
PW_BS000115
515
4
10
6
1
PW_BS000115
513
1
7
6
1
PW_BS000115
47
19
1
4
PW_BS000047
313
23
PW_BS000024
241
5
29
PW_BS000024
257
15
29
1
PW_BS000024
304
1
2
PW_BS000024
219
31
4
PW_BS000024
195
13
18
PW_BS000024
312
5
23
1
PW_BS000024
310
31
2
PW_BS000024
234
32
25
PW_BS000024
134
Oxoglutaric acid
HMDB0000208
Oxoglutaric acid, also known as alpha-ketoglutarate, alpha-ketoglutaric acid, AKG, or 2-oxoglutaric acid, is classified as a gamma-keto acid or a gamma-keto acid derivative. gamma-Keto acids are organic compounds containing an aldehyde substituted with a keto group on the C4 carbon atom. alpha-Ketoglutarate is considered to be soluble (in water) and acidic. alpha-Ketoglutarate is a key molecule in the TCA cycle, playing a fundamental role in determining the overall rate of this important metabolic process (PMID: 26759695). In the TCA cycle, AKG is decarboxylated to succinyl-CoA and carbon dioxide by AKG dehydrogenase, which functions as a key control point of the TCA cycle. Additionally, AKG can be generated from isocitrate by oxidative decarboxylation catalyzed by the enzyme known as isocitrate dehydrogenase (IDH). In addition to these routes of production, AKG can be produced from glutamate by oxidative deamination via glutamate dehydrogenase, and as a product of pyridoxal phosphate-dependent transamination reactions (mediated by branched-chain amino acid transaminases) in which glutamate is a common amino donor. AKG is a nitrogen scavenger and a source of glutamate and glutamine that stimulates protein synthesis and inhibits protein degradation in muscles. In particular, AKG can decrease protein catabolism and increase protein synthesis to enhance bone tissue formation in skeletal muscles (PMID: 26759695). Interestingly, enteric feeding of AKG supplements can significantly increase circulating plasma levels of hormones such as insulin, growth hormone, and insulin-like growth factor-1 (PMID: 26759695). It has recently been shown that AKG can extend the lifespan of adult C. elegans by inhibiting ATP synthase and TOR (PMID: 24828042). In combination with molecular oxygen, alpha-ketoglutarate is required for the hydroxylation of proline to hydroxyproline in the production of type I collagen. A recent study has shown that alpha-ketoglutarate promotes TH1 differentiation along with the depletion of glutamine thereby favouring Treg (regulatory T-cell) differentiation (PMID: 26420908). alpha-Ketoglutarate has been found to be associated with fumarase deficiency, 2-ketoglutarate dehydrogenase complex deficiency, and D-2-hydroxyglutaric aciduria, which are all inborn errors of metabolism (PMID: 8338207).
328-50-7
C00026
51
30915
2-KETOGLUTARATE
50
DB02926
OC(=O)CCC(=O)C(O)=O
C5H6O5
InChI=1S/C5H6O5/c6-3(5(9)10)1-2-4(7)8/h1-2H2,(H,7,8)(H,9,10)
KPGXRSRHYNQIFN-UHFFFAOYSA-N
2-oxopentanedioic acid
146.0981
146.021523302
-0.44
2
oxoglutarate
0
-2
FDB003361
2-ketoglutarate;2-ketoglutaric acid;2-oxo-1,5-pentanedioate;2-oxo-1,5-pentanedioic acid;2-oxoglutarate;2-oxoglutaric acid;2-oxopentanedioate;2-oxopentanedioic acid;Oxoglutarate;Alpha-ketoglutaric acid;Oxoglutaric acid;A-ketoglutarate;A-ketoglutaric acid;Alpha-ketoglutarate;α-ketoglutarate;α-ketoglutaric acid
PW_C000134
AKG
15
2
42
3
141
4
146
8
499
18
673
31
1108
42
1263
5
1447
50
1455
26
1467
54
5375
103
5414
117
5438
118
5564
132
6008
147
6036
155
6069
157
6092
161
6482
178
6530
85
7471
222
7515
224
7519
151
8209
225
8374
220
11863
198
12681
289
77054
253
77135
133
77481
111
77523
112
77746
129
77967
345
77970
346
77976
327
77984
347
78425
334
80018
368
80694
135
113162
94
119972
406
120022
124
120084
407
120174
122
120552
414
120814
418
120989
408
121146
423
121152
424
121160
425
122757
120
122831
119
123186
450
123399
454
123554
374
123718
458
123724
459
123732
460
125357
479
125400
299
125455
481
125533
297
125800
489
125929
482
126900
501
126940
388
126993
206
127066
205
127255
506
127388
502
448
L-Cysteine
HMDB0000574
Cysteine is a naturally occurring, sulfur-containing amino acid that is found in most proteins, although only in small quantities. Cysteine is unique amongst the twenty natural amino acids as it contains a thiol group. Thiol groups can undergo oxidation/reduction (redox) reactions; when cysteine is oxidized it can form cystine, which is two cysteine residues joined by a disulfide bond. This reaction is reversible since the reduction of this disulphide bond regenerates two cysteine molecules. The disulphide bonds of cystine are crucial to defining the structures of many proteins. Cysteine is often involved in electron-transfer reactions, and help the enzyme catalyze its reaction. Cysteine is also part of the antioxidant glutathione. N-Acetyl-L-cysteine (NAC) is a form of cysteine where an acetyl group is attached to cysteine's nitrogen atom and is sold as a dietary supplement. Cysteine is named after cystine, which comes from the Greek word kustis meaning bladder (cystine was first isolated from kidney stones). Oxidation of cysteine can produce a disulfide bond with another thiol and further oxidation can produce sulphfinic or sulfonic acids. The cysteine thiol group is also a nucleophile and can undergo addition and substitution reactions. Thiol groups become much more reactive when they are ionized, and cysteine residues in proteins have pKa values close to neutrality, so they are often in their reactive thiolate form in the cell. The thiol group also has a high affinity for heavy metals and proteins containing cysteine will bind metals such as mercury, lead, and cadmium tightly. Due to this ability to undergo redox reactions, cysteine has antioxidant properties. Cysteine is an important source of sulfur in human metabolism, and although it is classified as a non-essential amino acid, cysteine may be essential for infants, the elderly, and individuals with certain metabolic disease or who suffer from malabsorption syndromes. Cysteine may at some point be recognized as an essential or conditionally essential amino acid (Wikipedia). Cysteine is important in energy metabolism. As cystine, it is a structural component of many tissues and hormones. Cysteine has clinical uses ranging from baldness to psoriasis to preventing smoker's hack. In some cases, oral cysteine therapy has proved excellent for treatment of asthmatics, enabling them to stop theophylline and other medications. Cysteine also enhances the effect of topically applied silver, tin, and zinc salts in preventing dental cavities. In the future, cysteine may play a role in the treatment of cobalt toxicity, diabetes, psychosis, cancer, and seizures (http://www.dcnutrition.com/AminoAcids/).
52-90-4
C00097
5862
17561
CYS
5653
DB00151
N[C@@H](CS)C(O)=O
C3H7NO2S
InChI=1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)/t2-/m0/s1
XUJNEKJLAYXESH-REOHCLBHSA-N
(2R)-2-amino-3-sulfanylpropanoic acid
121.158
121.019749163
-0.72
3
L-cysteine
0
0
DBMET00503
FDB012678
(+)-2-amino-3-mercaptopropionic acid;(2r)-2-amino-3-mercaptopropanoate;(2r)-2-amino-3-mercaptopropanoic acid;(2r)-2-amino-3-sulfanylpropanoate;(2r)-2-amino-3-sulfanylpropanoic acid;(r)-(+)-cysteine;(r)-2-amino-3-mercaptopropanoate;(r)-2-amino-3-mercaptopropanoic acid;(r)-2-amino-3-mercapto-propanoate;(r)-2-amino-3-mercapto-propanoic acid;(r)-cysteine;2-amino-3-mercaptopropanoate;2-amino-3-mercaptopropanoic acid;2-amino-3-mercaptopropionate;2-amino-3-mercaptopropionic acid;3-mercapto-l-alanine;Acetylcysteine;B-mercaptoalanine;Carbocysteine;Cisteina;Cisteinum;Cystein;Cysteine;Cysteinum;Free cysteine;Half-cystine;L cysteine;L-(+)-cysteine;L-2-amino-3-mercaptopropanoate;L-2-amino-3-mercaptopropanoic acid;L-2-amino-3-mercaptopropionic acid;L-cystein;L-cysteine;Polycysteine;Thioserine;Alpha-amino-beta-thiolpropionic acid;Beta-mercaptoalanine;C;Cys;E920;L-zystein;(2r)-2-amino-3-sulphanylpropanoate;(2r)-2-amino-3-sulphanylpropanoic acid;L-2-amino-3-mercaptopropionate
PW_C000448
Cys
174
8
1867
2
2864
9
2870
15
5767
101
5801
108
6756
117
6759
107
7078
188
7496
224
7594
160
8256
227
8260
225
12012
281
12269
151
42651
315
43730
322
77778
111
77795
113
77796
132
80704
135
120125
122
120131
124
120580
126
122863
118
123210
443
125491
297
125498
299
127029
205
127035
388
95
L-Glutamic acid
HMDB0000148
Glutamic acid (Glu), also referred to as glutamate (the anion), is one of the 20 proteinogenic amino acids. It is not among the essential amino acids. Glutamate is a key molecule in cellular metabolism. In humans, dietary proteins are broken down by digestion into amino acids, which serves as metabolic fuel or other functional roles in the body. Glutamate is the most abundant fast excitatory neurotransmitter in the mammalian nervous system. At chemical synapses, glutamate is stored in vesicles. Nerve impulses trigger release of glutamate from the pre-synaptic cell. In the opposing post-synaptic cell, glutamate receptors, such as the NMDA receptor, bind glutamate and are activated. Because of its role in synaptic plasticity, it is believed that glutamic acid is involved in cognitive functions like learning and memory in the brain. Glutamate transporters are found in neuronal and glial membranes. They rapidly remove glutamate from the extracellular space. In brain injury or disease, they can work in reverse and excess glutamate can accumulate outside cells. This process causes calcium ions to enter cells via NMDA receptor channels, leading to neuronal damage and eventual cell death, and is called excitotoxicity. The mechanisms of cell death include: * Damage to mitochondria from excessively high intracellular Ca2+. * Glu/Ca2+-mediated promotion of transcription factors for pro-apoptotic genes, or downregulation of transcription factors for anti-apoptotic genes. Excitotoxicity due to glutamate occurs as part of the ischemic cascade and is associated with stroke and diseases like amyotrophic lateral sclerosis, lathyrism, and Alzheimer's disease. glutamic acid has been implicated in epileptic seizures. Microinjection of glutamic acid into neurons produces spontaneous depolarization around one second apart, and this firing pattern is similar to what is known as paroxysmal depolarizing shift in epileptic attacks. This change in the resting membrane potential at seizure foci could cause spontaneous opening of voltage activated calcium channels, leading to glutamic acid release and further depolarization. (http://en.wikipedia.org/wiki/Glutamic_acid).
56-86-0
C00025
33032
16015
GLT
30572
DB00142
N[C@@H](CCC(O)=O)C(O)=O
C5H9NO4
InChI=1S/C5H9NO4/c6-3(5(9)10)1-2-4(7)8/h3H,1-2,6H2,(H,7,8)(H,9,10)/t3-/m0/s1
WHUUTDBJXJRKMK-VKHMYHEASA-N
(2S)-2-aminopentanedioic acid
147.1293
147.053157781
-0.26
3
L-glutamic acid
0
-1
FDB012535
(2s)-2-aminopentanedioate;(2s)-2-aminopentanedioic acid;(s)-(+)-glutamate;(s)-(+)-glutamic acid;(s)-2-aminopentanedioate;(s)-2-aminopentanedioic acid;(s)-glutamate;(s)-glutamic acid;1-amino-propane-1,3-dicarboxylate;1-amino-propane-1,3-dicarboxylic acid;1-aminopropane-1,3-dicarboxylate;1-aminopropane-1,3-dicarboxylic acid;2-aminoglutarate;2-aminoglutaric acid;2-aminopentanedioate;2-aminopentanedioic acid;Aciglut;Aminoglutarate;Aminoglutaric acid;E;Glt;Glu;Glusate;Glut;Glutacid;Glutamicol;Glutamidex;Glutaminate;Glutaminic acid;Glutaminol;Glutaton;L-(+)-glutamate;L-(+)-glutamic acid;L-glu;L-glutamate;L-glutaminate;L-glutaminic acid;L-a-aminoglutarate;L-a-aminoglutaric acid;L-alpha-aminoglutarate;L-alpha-aminoglutaric acid;A-aminoglutarate;A-aminoglutaric acid;A-glutamate;A-glutamic acid;Alpha-aminoglutarate;Alpha-aminoglutaric acid;Alpha-glutamate;Alpha-glutamic acid;Acide glutamique;Acido glutamico;Acidum glutamicum;Glutamate;Glutamic acid;L-glutaminsaeure
PW_C000095
Glu
16
2
44
3
65
8
119
1
138
4
164
14
969
9
1105
42
1448
50
1456
26
1462
54
5323
111
5344
113
5415
117
5439
118
5565
132
5631
107
5632
108
5859
105
6006
147
6071
157
6191
94
6531
85
6838
187
6844
188
7092
72
7093
71
7165
205
7182
207
7514
224
7518
151
8208
225
8373
220
11792
198
11855
161
12004
222
12621
31
12683
289
12697
290
42348
315
42349
318
42845
320
77020
253
77332
133
77525
112
77971
346
77977
327
77981
347
78291
345
80649
135
120023
124
120040
122
120086
407
120347
406
120692
126
120816
418
121147
423
121153
424
121157
425
122833
119
122997
120
123299
443
123401
454
123719
458
123725
459
123729
460
125401
299
125418
297
125457
481
125667
479
125769
301
125802
489
126941
388
126995
206
127162
501
127257
506
1056
3-Mercaptopyruvic acid
HMDB0001368
3-Mercaptopyruvic acid is an intermediate in the metabolism of Cysteine. It is a substrate for L-lactate dehydrogenase A chain, 3-mercaptopyruvate sulfurtransferase, Aspartate aminotransferase (mitochondrial), L-lactate dehydrogenase C chain, L-lactate dehydrogenase A-like 6A, Aspartate aminotransferase (cytoplasmic), L-lactate dehydrogenase B chain and L-lactate dehydrogenase A-like 6B.
2464-23-5
C00957
98
16208
3-MERCAPTO-PYRUVATE
96
OC(=O)C(=O)CS
C3H4O3S
InChI=1S/C3H4O3S/c4-2(1-7)3(5)6/h7H,1H2,(H,5,6)
OJOLFAIGOXZBCI-UHFFFAOYSA-N
2-oxo-3-sulfanylpropanoic acid
120.127
119.988114684
-1.12
2
β-mercaptopyruvic acid
0
-1
FDB021862
3-mercapto-pyruvate;3-mercapto-pyruvic acid;3-mercaptopyruvate;3-mercaptopyruvic acid;Mercaptopyruvate;Mercaptopyruvic acid;Thiopyruvate;Beta-3-mercapto-2-oxo-propanoate;Beta-3-mercapto-2-oxo-propanoic acid;Beta-mercaptopyruvate;Beta-mercaptopyruvic acid;Beta-thiopyruvate;Beta-thiopyruvic acid;3-mercapto-2-oxopropanoic acid;3-mercapto-2-oxopropanoate
PW_C001056
3McPyra
715
8
77786
111
120564
122
123198
135
164
Pyruvic acid
HMDB0000243
Pyruvic acid is an intermediate compound in the metabolism of carbohydrates, proteins, and fats. In thiamine deficiency, its oxidation is retarded and it accumulates in the tissues, especially in nervous structures. (From Stedman, 26th ed.) Biological Source: Intermediate in primary metabolism including fermentation processes. Present in muscle in redox equilibrium with Lactic acid. A common constituent, as a chiral cyclic acetal linked to saccharide residues, of bacterial polysaccharides. Isolated from cane sugar fermentation broth and peppermint. Constituent of Bauhinia purpurea, Cicer arietinum (chickpea), Delonix regia, Pisum sativum (pea) and Trigonella caerulea (sweet trefoil) Use/Importance: Reagent for regeneration of carbonyl compdounds from semicarbazones, phenylhydrazones and oximes. Flavoring ingredient (Dictionary of Organic Compounds).
127-17-3
C00022
1060
32816
PYRUVATE
1031
DB00119
CC(=O)C(O)=O
C3H4O3
InChI=1S/C3H4O3/c1-2(4)3(5)6/h1H3,(H,5,6)
LCTONWCANYUPML-UHFFFAOYSA-N
2-oxopropanoic acid
88.0621
88.016043994
0.18
1
pyruvic acid
0
-1
FDB008293
2-oxopropanoate;2-oxopropanoic acid;2-oxopropionate;2-oxopropionic acid;Acetylformate;Acetylformic acid;Bts;Pyroracemate;Pyroracemic acid;Pyruvate;A-ketopropionate;A-ketopropionic acid;Alpha-ketopropionate;Alpha-ketopropionic acid;2-ketopropionic acid;2-oxopropansaeure;2-oxopropionsaeure;Acide pyruvique;Alpha-oxopropionsaeure;Brenztraubensaeure;Ch3cocooh;2-ketopropionate;α-ketopropionate;α-ketopropionic acid;A-oxopropionsaeure;α-oxopropionsaeure
PW_C000164
Pyr
17
2
20
4
422
8
1181
3
1449
50
1457
26
5365
103
5405
117
5440
118
5444
120
5566
132
5570
133
5893
95
5920
147
5951
151
6022
155
6067
156
6074
161
6126
160
6383
1
6467
178
6510
177
6532
85
7457
222
7495
220
8200
225
12622
31
15292
249
15349
18
77310
111
77972
346
77978
327
78090
112
80004
368
80042
367
80695
135
112879
94
115683
121
119950
406
120011
124
120175
122
120878
407
121148
423
121154
424
123454
119
123720
458
123726
459
125340
479
125390
299
125534
297
125854
481
126883
501
126931
388
127067
205
127858
206
1827
Hydrogen sulfide
HMDB0003276
Hydrogen sulfide is a highly toxic and flammable gas. Because it is heavier than air it tends to accumulate at the bottom of poorly ventilated spaces. Although very pungent at first, it quickly deadens the sense of smell, so potential victims may be unaware of its presence until it is too late. H2S arises from virtually anywhere where elemental sulfur comes into contact with organic material, especially at high temperatures. Hydrogen sulfide is a covalent hydride chemically related to water (H2O) since oxygen and sulfur occur in the same periodic table group. It often results when bacteria break down organic matter in the absence of oxygen, such as in swamps, and sewers (alongside the process of anaerobic digestion). It also occurs in volcanic gases, natural gas and some well waters. It is also important to note that Hydrogen sulfide is a central participant in the sulfur cycle, the biogeochemical cycle of sulfur on Earth. As mentioned above, sulfur-reducing and sulfate-reducing bacteria derive energy from oxidizing hydrogen or organic molecules in the absence of oxygen by reducing sulfur or sulfate to hydrogen sulfide. Other bacteria liberate hydrogen sulfide from sulfur-containing amino acids. Several groups of bacteria can use hydrogen sulfide as fuel, oxidizing it to elemental sulfur or to sulfate by using oxygen or nitrate as oxidant. The purple sulfur bacteria and the green sulfur bacteria use hydrogen sulfide as electron donor in photosynthesis, thereby producing elemental sulfur. (In fact, this mode of photosynthesis is older than the mode of cyanobacteria, algae and plants which uses water as electron donor and liberates oxygen).
7783-06-4
C00283
18779926
16136
HS
391
S
H2S
InChI=1S/H2S/h1H2
RWSOTUBLDIXVET-UHFFFAOYSA-N
hydrogen sulfide
34.081
33.987720754
1
hydrogen sulfide
0
-1
FDB009599
Acide sulfhydrique;Dihydrogen disulfide;Dihydrogen monosulfide;Dihydrogen sulfide;Hepatate;Hepatic acid;Hepatic gas;Hydrogen monosulfide;Hydrogen sulfide;Hydrogen-sulfide;Hydrogene sulfure;Hydrosulfurate;Hydrosulfuric acid;Idrogeno solforato;Schwefelwasserstoff;Sewer gas;Siarkowodor;Sour gas;Stink damp;Sulfur hydride;Sulfur hydroxide;Sulfureted hydrogen;Sulfuretted hydrogen;Zwavelwaterstof;[sh2];H2s;Hydrogen sulphide;Sulfide;Sulfure d'hydrogene;Acide sulphhydrique;Dihydrogen monosulphide;Dihydrogen sulphide;Hydrogen monosulphide;Hydrogen-sulphide;Hydrogene sulphure;Hydrosulfate;Hydrosulphate;Hydrosulphuric acid;Sulphide;Sulphure d'hydrogene
PW_C001827
H2SO
714
8
77785
111
120572
122
123206
135
414
Adenosine triphosphate
HMDB0000538
Adenosine triphosphate (ATP) is a nucleotide consisting of a purine base (adenine) attached to the first carbon atom of ribose (a pentose sugar). Three phosphate groups are esterified at the fifth carbon atom of the ribose. ATP is incorporated into nucleic acids by polymerases in the processes of DNA replication and transcription. ATP contributes to cellular energy charge and participates in overall energy balance, maintaining cellular homeostasis. ATP can act as an extracellular signaling molecule via interactions with specific purinergic receptors to mediate a wide variety of processes as diverse as neurotransmission, inflammation, apoptosis, and bone remodelling. Extracellular ATP and its metabolite adenosine have also been shown to exert a variety of effects on nearly every cell type in human skin, and ATP seems to play a direct role in triggering skin inflammatory, regenerative, and fibrotic responses to mechanical injury, an indirect role in melanocyte proliferation and apoptosis, and a complex role in Langerhans cell-directed adaptive immunity. During exercise, intracellular homeostasis depends on the matching of adenosine triphosphate (ATP) supply and ATP demand. Metabolites play a useful role in communicating the extent of ATP demand to the metabolic supply pathways. Effects as different as proliferation or differentiation, chemotaxis, release of cytokines or lysosomal constituents, and generation of reactive oxygen or nitrogen species are elicited upon stimulation of blood cells with extracellular ATP. The increased concentration of adenosine triphosphate (ATP) in erythrocytes from patients with chronic renal failure (CRF) has been observed in many studies but the mechanism leading to these abnormalities still is controversial. (PMID: 15490415, 15129319, 14707763, 14696970, 11157473).
56-65-5
C00002
5957
15422
ATP
5742
DB00171
NC1=NC=NC2=C1N=CN2[C@@H]1O[C@H](COP(O)(=O)OP(O)(=O)OP(O)(O)=O)[C@@H](O)[C@H]1O
C10H16N5O13P3
InChI=1S/C10H16N5O13P3/c11-8-5-9(13-2-12-8)15(3-14-5)10-7(17)6(16)4(26-10)1-25-30(21,22)28-31(23,24)27-29(18,19)20/h2-4,6-7,10,16-17H,1H2,(H,21,22)(H,23,24)(H2,11,12,13)(H2,18,19,20)/t4-,6-,7-,10-/m1/s1
ZKHQWZAMYRWXGA-KQYNXXCUSA-N
({[({[(2R,3S,4R,5R)-5-(6-amino-9H-purin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy}(hydroxy)phosphoryl)oxy](hydroxy)phosphoryl}oxy)phosphonic acid
507.181
506.995745159
-2.05
7
adenosine triphosphate
0
-3
FDB021813
5'-(tetrahydrogen triphosphate) adenosine;5'-atp;Atp;Adenosine 5'-triphosphate;Adenosine 5'-triphosphorate;Adenosine 5'-triphosphoric acid;Adenosine triphosphate;Adenylpyrophosphorate;Adenylpyrophosphoric acid;Adephos;Adetol;Adynol;Atipi;Atriphos;Cardenosine;Fosfobion;Glucobasin;Myotriphos;Phosphobion;Striadyne;Triadenyl;Triphosphaden;Triphosphoric acid adenosine ester;Adenosine-5'-triphosphate;H4atp;Adenosine triphosphoric acid;Adenosine-5'-triphosphoric acid
PW_C000414
ATP
9
2
21
4
60
8
266
16
414
22
478
13
733
32
799
5
934
39
976
3
2105
18
2112
10
2146
49
2156
14
2160
58
2405
59
2434
27
2726
46
2812
29
3029
66
3163
72
3616
61
3617
51
4399
23
4474
31
4768
91
4864
54
5032
89
5035
26
5155
7
5205
97
5215
100
5250
104
5291
101
5313
111
5346
112
5390
103
5406
117
5430
118
5443
120
5542
129
5556
132
5569
133
5603
135
5621
108
5846
143
5854
146
5876
107
5897
147
5924
151
6048
155
6109
161
6230
166
6493
178
6839
188
6870
160
6976
199
7157
205
7184
206
7209
210
7225
213
7229
211
7298
198
7302
216
7390
217
7408
218
7432
163
7481
222
7499
190
8186
225
11847
277
11903
170
12010
281
12039
164
12178
285
12578
226
12691
290
13264
223
15327
308
42326
315
42621
322
42694
318
77028
253
77218
134
77233
329
77468
333
77632
336
78037
332
78041
350
78168
128
78214
351
78240
353
78411
335
78494
115
78850
130
78865
331
78919
334
80028
368
80046
184
80674
119
85629
1
94826
124
113234
94
113282
388
116280
109
119914
122
119992
406
120154
407
120245
382
120362
412
121246
429
121392
123
121397
433
121471
408
121974
410
122065
125
122079
383
122083
405
122402
422
122444
435
122919
399
123009
446
123816
464
123951
447
123956
468
124029
374
124527
444
124616
136
124630
398
124634
376
124943
472
124972
375
125011
470
125304
297
125371
479
125392
299
125515
481
125595
484
126123
485
126220
300
126234
495
126240
478
126547
491
126596
499
126913
501
127123
389
127731
516
127781
395
127796
390
127801
209
128119
508
128167
517
1420
Water
HMDB0002111
Water is a chemical substance that is essential to all known forms of life. It appears colorless to the naked eye in small quantities, though it is actually slightly blue in color. It covers 71% of Earth's surface. Current estimates suggest that there are 1.4 billion cubic kilometers (330 million m3) of it available on Earth, and it exists in many forms. It appears mostly in the oceans (saltwater) and polar ice caps, but it is also present as clouds, rain water, rivers, freshwater aquifers, lakes, and sea ice. Water in these bodies perpetually moves through a cycle of evaporation, precipitation, and runoff to the sea. Clean water is essential to human life. In many parts of the world, it is in short supply. From a biological standpoint, water has many distinct properties that are critical for the proliferation of life that set it apart from other substances. It carries out this role by allowing organic compounds to react in ways that ultimately allow replication. All known forms of life depend on water. Water is vital both as a solvent in which many of the body's solutes dissolve and as an essential part of many metabolic processes within the body. Metabolism is the sum total of anabolism and catabolism. In anabolism, water is removed from molecules (through energy requiring enzymatic chemical reactions) in order to grow larger molecules (e.g. starches, triglycerides and proteins for storage of fuels and information). In catabolism, water is used to break bonds in order to generate smaller molecules (e.g. glucose, fatty acids and amino acids to be used for fuels for energy use or other purposes). Water is thus essential and central to these metabolic processes. Water is also central to photosynthesis and respiration. Photosynthetic cells use the sun's energy to split off water's hydrogen from oxygen. Hydrogen is combined with CO2 (absorbed from air or water) to form glucose and release oxygen. All living cells use such fuels and oxidize the hydrogen and carbon to capture the sun's energy and reform water and CO2 in the process (cellular respiration). Water is also central to acid-base neutrality and enzyme function. An acid, a hydrogen ion (H+, that is, a proton) donor, can be neutralized by a base, a proton acceptor such as hydroxide ion (OH-) to form water. Water is considered to be neutral, with a pH (the negative log of the hydrogen ion concentration) of 7. Acids have pH values less than 7 while bases have values greater than 7. Stomach acid (HCl) is useful to digestion. However, its corrosive effect on the esophagus during reflux can temporarily be neutralized by ingestion of a base such as aluminum hydroxide to produce the neutral molecules water and the salt aluminum chloride. Human biochemistry that involves enzymes usually performs optimally around a biologically neutral pH of 7.4. (Wikipedia).
7732-18-5
C00001
962
15377
937
O
H2O
InChI=1S/H2O/h1H2
XLYOFNOQVPJJNP-UHFFFAOYSA-N
water
18.0153
18.010564686
1
water
0
0
FDB013390
Dihydrogen oxide;Steam;[oh2];Acqua;Agua;Aqua;Bound water;Dihydridooxygen;Eau;H2o;Hoh;Hydrogen hydroxide;Wasser
PW_C001420
H2O
55
8
94
9
109
5
139
4
151
3
162
14
481
13
526
15
624
28
652
10
691
20
770
33
823
18
838
2
1094
31
1377
49
1465
54
1590
43
2018
24
2532
22
2678
60
2727
46
2778
17
2805
29
3143
70
3164
72
3634
61
4598
36
4727
37
4941
93
5030
27
5156
7
5195
97
5214
100
5227
94
5236
103
5297
105
5319
111
5343
113
5355
112
5402
110
5470
123
5483
125
5492
126
5507
127
5534
130
5537
114
5541
129
5591
135
5608
118
5622
108
5691
6
5759
140
5778
101
5841
143
5853
146
5877
107
5890
95
5910
147
5940
151
6032
155
6059
157
6087
161
6123
163
6133
159
6215
1
6218
166
6477
178
6507
180
6600
152
6713
117
6840
188
6888
160
7162
205
7181
207
7193
206
7211
211
7228
213
7238
214
7243
215
7295
198
7350
216
7388
210
7401
212
7467
222
7492
224
7500
190
7588
170
8201
225
8237
226
8414
162
9265
26
11850
277
11922
164
12011
281
12213
285
12250
286
12264
287
12327
249
12520
227
12632
65
12693
290
12705
291
12715
292
13007
298
13019
300
13025
301
13037
302
13261
223
13327
294
15340
308
42327
315
42695
318
43691
322
76914
293
77019
253
77102
132
77131
133
77215
134
77378
331
77397
332
77471
333
77516
115
77536
334
77628
336
77722
337
77759
341
77816
343
77982
347
78071
329
78235
352
78242
353
78270
356
79113
360
80014
368
80039
370
80591
228
80656
119
93830
383
94794
384
110557
390
110639
391
115844
398
119879
232
119915
122
119963
406
120008
407
120046
408
120113
124
120365
412
120430
405
120438
409
120606
415
120794
414
121158
425
121240
429
121351
121
121381
419
121607
434
122118
382
122384
436
122753
120
122797
374
122804
443
123012
446
123064
376
123072
137
123131
447
123142
136
123162
448
123231
451
123384
450
123730
460
123810
464
123940
455
124165
469
124670
399
124938
471
124945
472
125305
297
125353
479
125386
481
125424
482
125480
299
125682
483
125707
478
125745
487
126054
490
126238
495
126273
484
126764
480
126896
501
126963
502
127017
388
127177
208
127199
209
127227
504
127506
507
127576
515
127836
389
128082
395
128176
513
1034
Adenosine diphosphate
HMDB0001341
Adenosine diphosphate, abbreviated ADP, is a nucleotide. It is an ester of pyrophosphoric acid with the nucleotide adenine. ADP consists of the pyrophosphate group, the pentose sugar ribose, and the nucleobase adenine. ADP is the product of ATP dephosphorylation by ATPases. ADP is converted back to ATP by ATP synthases.
58-64-0
C00008
6022
16761
ADP
5800
NC1=NC=NC2=C1N=CN2[C@@H]1O[C@H](COP(O)(=O)OP(O)(O)=O)[C@@H](O)[C@H]1O
C10H15N5O10P2
InChI=1S/C10H15N5O10P2/c11-8-5-9(13-2-12-8)15(3-14-5)10-7(17)6(16)4(24-10)1-23-27(21,22)25-26(18,19)20/h2-4,6-7,10,16-17H,1H2,(H,21,22)(H2,11,12,13)(H2,18,19,20)/t4-,6-,7-,10-/m1/s1
XTWYTFMLZFPYCI-KQYNXXCUSA-N
[({[(2R,3S,4R,5R)-5-(6-amino-9H-purin-9-yl)-3,4-dihydroxyoxolan-2-yl]methoxy}(hydroxy)phosphoryl)oxy]phosphonic acid
427.2011
427.029414749
-2.12
6
adenosine-diphosphate
0
-2
FDB021817
Adp;Adenosindiphosphorsaeure;Adenosine 5'-pyrophosphate;Adenosine diphosphate;Adenosine pyrophosphate;Adenosine-5'-diphosphate;Adenosine-5-diphosphate;Adenosine-diphosphate;5'-adenylphosphoric acid;Adenosine 5'-diphosphate;H3adp;5'-adenylphosphate;Adenosine 5'-diphosphoric acid;Adenosine-5'-diphosphoric acid
PW_C001034
ADP
23
4
134
8
415
22
482
13
801
5
963
15
978
3
1061
14
1518
2
1901
49
2104
18
2113
10
2161
58
2408
59
2435
27
2728
47
2736
46
2855
29
3165
72
3635
61
4400
23
4476
31
4770
91
5036
26
5157
7
5208
97
5217
100
5315
111
5349
112
5392
103
5446
120
5544
129
5572
133
5624
108
5741
117
5764
101
5849
143
5856
146
5878
107
5899
147
5926
151
6050
155
6111
161
6231
166
6495
178
6700
94
6841
188
6872
160
7159
205
7187
206
7208
210
7226
213
7231
211
7300
198
7303
216
7391
217
7410
218
7433
163
7483
222
8187
225
11851
277
11905
170
12013
281
12180
285
13262
223
15329
308
42328
315
42398
313
42622
322
42696
318
77029
253
77087
132
77216
134
77306
329
77472
333
77663
336
78039
332
78043
350
78170
128
78215
351
78244
353
78414
335
78495
115
78705
331
78849
130
78920
334
80030
368
80622
118
80651
135
80676
119
94827
124
113283
388
116204
109
119944
122
119994
406
120156
407
120318
382
120366
412
121248
429
121394
123
121399
433
121472
408
121899
383
121976
410
122064
125
122085
405
122405
422
122445
435
122973
399
123013
446
123818
464
123953
447
123958
468
124030
374
124452
398
124529
444
124615
136
124636
376
124947
472
124975
375
125012
470
125334
297
125373
479
125492
299
125517
481
125645
484
126125
485
126219
300
126235
495
126242
478
126550
491
126597
499
126915
501
127733
516
127780
395
127797
390
127803
209
128122
508
128168
517
128313
389
1104
Phosphate
HMDB0001429
Phosphate is a salt of phosphoric acid. In organic chemistry, a phosphate, or organophosphate, is an ester of phosphoric acid. Organic phosphates are important in biochemistry, biogeochemistry and ecology. Phosphate (Pi) is an essential component of life. In biological systems, phosphorus is found as a free phosphate ion in solution and is called inorganic phosphate, to distinguish it from phosphates bound in various phosphate esters. Inorganic phosphate is generally denoted Pi and at physiological (neutral) pH primarily consists of a mixture of HPO<sup>2-</sup><sub>4</sub> and H<sub>2</sub>PO<sup>-</sup><sub>4</sub> ions. phosphates are most commonly found in the form of adenosine phosphates, (AMP, ADP and ATP) and in DNA and RNA and can be released by the hydrolysis of ATP or ADP. Similar reactions exist for the other nucleoside diphosphates and triphosphates. Phosphoanhydride bonds in ADP and ATP, or other nucleoside diphosphates and triphosphates, contain high amounts of energy which give them their vital role in all living organisms. Phosphate must be actively transported into cells against its electrochemical gradient. In vertebrates, two unrelated families of Na+-dependent Pi transporters carry out this task. Remarkably, the two families transport different Pi species: whereas type II Na+/Pi cotransporters (SCL34) prefer divalent HPO4(2), type III Na+/Pi cotransporters (SLC20) transport monovalent H2PO4. The SCL34 family comprises both electrogenic and electroneutral members that are expressed in various epithelia and other polarized cells. Through regulated activity in apical membranes of the gut and kidney, they maintain body Pi homeostasis, and in salivary and mammary glands, liver, and testes they play a role in modulating the Pi content of luminal fluids. Phosphate levels in the blood play an important role in hormone signaling and in bone homeostasis. In classical endocrine regulation, low serum phosphate induces the renal production of the seco-steroid hormone 1,25-dihydroxyvitamin D3 (1,25(OH)2D3).This active metabolite of vitamin D acts to restore circulating mineral (i.e. phosphate and calcium) levels by increasing absorption in the intestine, reabsorption in the kidney, and mobilization of calcium and phosphate from bone. Thus, chronic renal failure is associated with hyperparathyroidism, which in turn contributes to osteomalacia (softening of the bones). Another complication of chronic renal failure is hyperphosphatemia (low levels of phosphate in the blood). Hyperphosphatemia (excess levels of phosphate in the blood) is a prevalent condition in kidney dialysis patients and is associated with increased risk of mortality. Hypophosphatemia (hungry bone syndrome) has been associated to postoperative electrolyte aberrations and after parathyroidectomy. (PMID: 17581921, 11169009, 11039261, 9159312, 17625581)Fibroblast growth factor 23 (FGF-23) has recently been recognized as a key mediator of phosphate homeostasis, its most notable effect being promotion of phosphate excretion. FGF-23 was discovered to be involved in diseases such as autosomal dominant hypophosphatemic rickets, X-linked hypophosphatemia, and tumor-induced osteomalacia in which phosphate wasting was coupled to inappropriately low levels of 1,25(OH)2D3. FGF-23 is regulated by dietary phosphate in humans. In particular it was found that phosphate restriction decreased FGF-23, and phosphate loading increased FGF-23.
14265-44-2
C00009
1061
18367
CPD-8587
1032
[O-]P([O-])([O-])=O
O4P
InChI=1S/H3O4P/c1-5(2,3)4/h(H3,1,2,3,4)/p-3
NBIIXXVUZAFLBC-UHFFFAOYSA-K
phosphoric acid
94.9714
94.95342
3
phosphoric acid
0
-2
DBMET00532
FDB022617
Nfb orthophosphate;O-phosphoric acid;Ortho-phosphate;Orthophosphate (po43-);Orthophosphate(3-);Phosphate;Phosphate (po43-);Phosphate anion(3-);Phosphate ion (po43-);Phosphate ion(3-);Phosphate trianion;Phosphate(3-);Phosphoric acid ion(3-);Pi;[po4](3-);Orthophosphate;Phosphate ion;Po4(3-);Phosphoric acid;Orthophosphoric acid;Phosphoric acid ion
PW_C001104
Pi
24
4
84
8
814
5
818
18
831
2
980
3
1763
14
1767
49
2500
10
2729
47
2737
46
3129
29
3166
72
3636
61
3851
23
4249
22
4475
31
5031
27
5158
7
5207
97
5216
100
5317
111
5351
112
5381
103
5447
120
5543
129
5573
133
5605
135
5625
108
5693
6
5848
143
5855
146
5911
147
5941
151
6040
155
6100
161
6294
107
6487
178
6691
101
6714
117
6842
188
6889
160
7161
205
7189
206
7212
211
7306
198
7389
210
7402
212
7436
163
7475
222
8196
225
8258
227
10118
241
10134
257
11748
132
11761
115
11773
213
11904
170
11927
164
12014
281
12728
290
13263
223
34819
17
42255
304
42350
315
42435
318
43692
322
77018
253
77194
293
77217
134
77940
336
77966
130
78048
332
78057
329
78245
353
78669
331
80022
368
89279
308
93831
383
94796
384
110558
390
110640
391
113235
94
115845
398
116206
109
119982
406
120069
122
120699
407
121057
124
121216
125
121268
429
121352
121
121409
123
121423
382
121852
405
123304
119
123621
118
123786
136
123838
464
123968
447
123981
399
124405
376
124948
472
125362
479
125446
297
125774
481
125954
299
126221
478
126594
300
126604
298
126723
484
126904
501
127413
388
127783
209
128166
395
128177
513
128315
389
40034
Hydrogen Ion
HMDB0059597
Hydrogen ion is recommended by IUPAC as a general term for all ions of hydrogen and its isotopes. Depending on the charge of the ion, two different classes can be distinguished: positively charged ions and negatively charged ions. Under aqueous conditions found in biochemistry, hydrogen ions exist as the hydrated form hydronium, H3O+, but these are often still referred to as hydrogen ions or even protons by biochemists. [WikiPedia])
C00080
1038
15378
1010
[H+]
H
InChI=1S/p+1
GPRLSGONYQIRFK-UHFFFAOYSA-N
hydron
1.0079
1.007825032
0
hydron
1
0
H+;H(+);Hydrogen cation;Hydron;Proton
PW_C040034
H+
215
4
670
8
753
15
788
31
848
3
1116
2
1463
26
1464
54
2231
49
2780
17
4250
22
4254
42
4547
10
4576
18
4694
70
5241
103
5327
111
5353
112
5626
108
5639
107
5699
100
5720
105
5742
117
5963
147
6037
155
6070
157
6093
161
6130
159
6232
166
6483
178
6601
152
6692
101
6843
188
6910
187
7100
163
7168
205
7191
206
7453
219
7454
220
7472
222
7525
213
7532
210
7558
212
7572
160
7590
170
8195
225
8218
151
8243
226
8413
162
8420
224
9139
195
9155
249
11915
164
12015
281
12181
285
12246
286
12266
287
12521
227
13257
223
13325
294
15330
308
42329
315
42354
318
42401
322
42405
312
42454
320
76912
293
77136
133
77210
134
77372
331
77804
114
77955
132
77990
327
77991
347
78379
345
79929
130
80019
368
80387
310
80388
304
80722
119
93823
124
94823
383
110550
388
112855
94
113280
390
115537
398
115539
118
115856
336
116205
109
119973
406
120193
407
120549
122
120593
409
121170
424
121171
425
122569
418
122615
384
122687
125
122758
120
123183
135
123218
137
123742
459
123743
460
125141
454
125188
121
125273
136
125359
479
125550
481
125730
483
125736
297
125809
299
126517
495
126717
489
126766
480
126823
300
126902
501
127213
208
128308
506
128361
391
128430
395
5824
Aspartate aminotransferase
P00509
Involved in transferase activity. L-aspartate + 2-oxoglutarate = oxaloacetate + L-glutamate.
aspC
b0928
AP009048
3
2.6.1.1
8631
101
6502
3-mercaptopyruvate sulfurtransferase
P31142
Involved in thiosulfate sulfurtransferase activity. Transfers a sulfur ion to cyanide or to other thiol compounds. Also has weak rhodanese activity (130-fold lower). Its participation in detoxification of cyanide may be small. May be involved in the enhancement of serine sensitivity.
sseA
b2521
AP009048
3
2.8.1.2
8803
101
6940
Uncharacterized amino-acid ABC transporter ATP-binding protein yecC
P37774
Involved in nucleotide binding. Probably part of a binding-protein-dependent transport system yecCS for an amino acid. Probably responsible for energy coupling to the transport system.
yecC
b1917
AP009048
3
6757
109
6941
Inner membrane amino-acid ABC transporter permease protein yecS
P0AFT2
Involved in transporter activity. Probably part of the binding-protein-dependent transport system yecCS for an amino acid; probably responsible for the translocation of the substrate across the membrane.
yecS
b1918
AP009048
3
6758
109
10376
L-cystine ABC transporter - periplasmic binding protein
P0AEM9
FliY is the periplasmic binding protein of an L-cystine/L-cysteine ABC transport system in E. coli K-12. (EcoCyc)
fliY
25
6755
109
12017
234
1358
aspartate transaminase
3
PW_P001358
1584
5824
2
4053
hydrogen sulfide synthesis
3
PW_P004053
11057
6502
1
6754
117
4055
L-cysteine ABC transporter
25
PW_P004055
11060
6940
1
11061
6941
1
11062
10376
6039
false
PW_R006039
Right
24694
134
1
Compound
false
24695
448
1
Compound
false
24696
95
1
Compound
false
24697
1056
1
Compound
false
6004
1358
6040
false
PW_R006040
Right
24698
1056
1
Compound
false
24699
164
1
Compound
false
24700
1827
1
Compound
false
6005
4053
2.8.1.2
186
PW_RCT000186
Right
1105
186
448
Compound
1
107
1106
186
414
Compound
1
117
1107
186
1420
Compound
1
117
1108
186
448
Compound
1
117
1109
186
1034
Compound
1
117
1110
186
1104
Compound
1
117
1111
186
40034
Compound
1
117
186
71088
134
3
false
722
606
10
regular
100
110
71089
448
3
false
592
701
10
regular
100
100
71090
95
3
false
1022
801
10
regular
100
110
71091
1056
3
false
1137
691
10
regular
100
120
71092
164
3
false
1272
1001
10
regular
100
100
71093
1827
3
false
1137
1081
10
regular
100
110
71131
414
117
42
false
529
821
10
regular
50
30
71132
1420
117
49
false
514
872
10
regular
78
78
71133
448
117
3
false
199
666
10
regular
100
100
71134
1034
117
43
false
524
586
10
regular
50
30
71135
1104
117
46
false
524
629
10
regular
44
43
71136
40034
117
55
false
513
492
10
regular
78
78
32599
5824
101
6
false
837
711
8
subunit
regular
160
80
32600
6502
101
2
false
1112
913
8
subunit
regular
150
70
32616
6940
109
76
false
355
651
8
subunit
regular
150
70
32617
6941
109
76
false
355
721
8
subunit
regular
150
70
32618
10376
109
76
false
355
681
8
subunit
regular
150
70
27417
1358
1819
32280
32599
27418
4053
1819
32281
32600
27425
4055
1819
109
32297
32616
32298
32617
32299
32618
100973
M772 716 C772 746 790 751 837 751
5
false
18
100974
M692 751 C760 751 799 751 837 751
5
false
18
100975
M1072 801 C1073 761 1040 752 997 751
5
false
18
true
M 25.946855044164835 178.44173415440585 L 11 177.1801778581098 L 17.380887721185843 190.75531218118815
false
100976
M1137 751 C1096 751 1038 751 997 751
5
false
18
true
M 25.946855044164835 178.44173415440585 L 11 177.1801778581098 L 17.380887721185843 190.75531218118815
false
100977
M1187 811 C1187 874 1187 848 1187 913
5
false
18
100978
M1272 1051 C1211 1048 1187 1013 1187 983
5
false
18
true
M 195.6315373487274 718.9822677287352 L 180.68468230456256 717.7207114324392 L 187.0655700257484 731.2958457555176
false
100979
M1187 1081 C1187 1051 1187 1013 1187 983
5
false
18
true
M 195.6315373487274 718.9822677287352 L 180.68468230456256 717.7207114324392 L 187.0655700257484 731.2958457555176
false
101026
M592 751 C461 751 550 751 430 751
5
false
18
true
M 1027.5 447.0096189432334 L 1035 460 L 1042.5 447.0096189432334
false
101027
M529 836 C470 835 430 781 430 751
5
false
18
101028
M514 911 C461 911 429 819 430 751
5
false
18
101029
M299 716 C319 716 320 717 355 716
5
false
18
false
false
101030
M524 601 C461 600 432 642 430 681
5
false
18
true
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