S-
adenosylmethionine
decarboxylase
proenzyme
Spermidine
synthase
5'-
methylthioadenosine/S-
adenosylhomocysteine
nucleosidase
Spermidine
N(1)-
acetyltransferase
S-
adenosylmethionine
synthase
D-methionine
transport
system permease
protein metI
D-methionine-
binding
lipoprotein
metQ
D-methionine
transport
system permease
protein metI
D-methionine-
binding
lipoprotein
metQ
Methionine
import
ATP-binding
protein MetN
L-Methionine
S-
Adenosylmethionine
H+
CO2
S-
Adenosylmethioninamine
Putrescine
Spermidine
H+
5'-S-methyl-
5'-
thioadenosine
H2O
5-
Methylthioribose
Adenine
Acetyl-CoA
N8-
Acetylspermidine
CoA
H+
H2O
ATP
Pi
PPi
L-Methionine
ATP
H2O
ADP
Pi
H+
L-Methionine
ATP
H2O
ADP
PPi
H+
Pyruvic acid
Magnesium
Methionine
import
ATP-binding
protein MetN
Methionine
Biosynthesis
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