PathWhiz ID | Pathway | Meta Data |
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PW088253View Pathway |
Valine, Leucine, and Isoleucine DegradationBos taurus
Valine, isoleuciine, and leucine are essential amino acids and are identified as the branched-chain amino acids (BCAAs). The catabolism of all three amino acids starts in muscle and yields NADH and FADH2 which can be utilized for ATP generation. The catabolism of all three of these amino acids uses the same enzymes in the first two steps. The first step in each case is a transamination using a single BCAA aminotransferase, with α-ketoglutarate as the amine acceptor. As a result, three different α-keto acids are produced and are oxidized using a common branched-chain α-keto acid dehydrogenase (BCKD), yielding the three different CoA derivatives. Isovaleryl-CoA is produced from leucine by these two reactions, alpha-methylbutyryl-CoA from isoleucine, and isobutyryl-CoA from valine. These acyl-CoA’s undergo dehydrogenation, catalyzed by three different but related enzymes, and the breakdown pathways then diverge. Leucine is ultimately converted into acetyl-CoA and acetoacetate; isoleucine into acetyl-CoA and succinyl-CoA; and valine into propionyl-CoA (and subsequently succinyl-CoA). Under fasting conditions, substantial amounts of all three amino acids are generated by protein breakdown. In muscle, the final products of leucine, isoleucine, and valine catabolism can be fully oxidized via the citric acid cycle; in the liver, they can be directed toward the synthesis of ketone bodies (acetoacetate and acetyl-CoA) and glucose (succinyl-CoA). Because isoleucine catabolism terminates with the production of acetyl-CoA and propionyl-CoA, it is both glucogenic and ketogenic. Because leucine gives rise to acetyl-CoA and acetoacetyl-CoA, it is classified as strictly ketogenic.
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Creator: Ana Marcu Created On: August 10, 2018 at 11:56 Last Updated: August 10, 2018 at 11:56 |
PW064671View Pathway |
Valine, Leucine, and Isoleucine DegradationMus musculus
Valine, isoleuciine, and leucine are essential amino acids and are identified as the branched-chain amino acids (BCAAs). The catabolism of all three amino acids starts in muscle and yields NADH and FADH2 which can be utilized for ATP generation. The catabolism of all three of these amino acids uses the same enzymes in the first two steps. The first step in each case is a transamination using a single BCAA aminotransferase, with α-ketoglutarate as the amine acceptor. As a result, three different α-keto acids are produced and are oxidized using a common branched-chain α-keto acid dehydrogenase (BCKD), yielding the three different CoA derivatives. Isovaleryl-CoA is produced from leucine by these two reactions, alpha-methylbutyryl-CoA from isoleucine, and isobutyryl-CoA from valine. These acyl-CoA’s undergo dehydrogenation, catalyzed by three different but related enzymes, and the breakdown pathways then diverge. Leucine is ultimately converted into acetyl-CoA and acetoacetate; isoleucine into acetyl-CoA and succinyl-CoA; and valine into propionyl-CoA (and subsequently succinyl-CoA). Under fasting conditions, substantial amounts of all three amino acids are generated by protein breakdown. In muscle, the final products of leucine, isoleucine, and valine catabolism can be fully oxidized via the citric acid cycle; in the liver, they can be directed toward the synthesis of ketone bodies (acetoacetate and acetyl-CoA) and glucose (succinyl-CoA). Because isoleucine catabolism terminates with the production of acetyl-CoA and propionyl-CoA, it is both glucogenic and ketogenic. Because leucine gives rise to acetyl-CoA and acetoacetyl-CoA, it is classified as strictly ketogenic.
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Creator: Carin Li Created On: January 22, 2018 at 00:27 Last Updated: January 22, 2018 at 00:27 |
PW000051View Pathway |
Valine, Leucine, and Isoleucine DegradationHomo sapiens
Valine, isoleuciine, and leucine are essential amino acids and are identified as the branched-chain amino acids (BCAAs). The catabolism of all three amino acids starts in muscle and yields NADH and FADH2 which can be utilized for ATP generation. The catabolism of all three of these amino acids uses the same enzymes in the first two steps. The first step in each case is a transamination using a single BCAA aminotransferase, with α-ketoglutarate as the amine acceptor. As a result, three different α-keto acids are produced and are oxidized using a common branched-chain α-keto acid dehydrogenase (BCKD), yielding the three different CoA derivatives. Isovaleryl-CoA is produced from leucine by these two reactions, alpha-methylbutyryl-CoA from isoleucine, and isobutyryl-CoA from valine. These acyl-CoA’s undergo dehydrogenation, catalyzed by three different but related enzymes, and the breakdown pathways then diverge. Leucine is ultimately converted into acetyl-CoA and acetoacetate; isoleucine into acetyl-CoA and succinyl-CoA; and valine into propionyl-CoA (and subsequently succinyl-CoA). Under fasting conditions, substantial amounts of all three amino acids are generated by protein breakdown. In muscle, the final products of leucine, isoleucine, and valine catabolism can be fully oxidized via the citric acid cycle; in the liver, they can be directed toward the synthesis of ketone bodies (acetoacetate and acetyl-CoA) and glucose (succinyl-CoA). Because isoleucine catabolism terminates with the production of acetyl-CoA and propionyl-CoA, it is both glucogenic and ketogenic. Because leucine gives rise to acetyl-CoA and acetoacetyl-CoA, it is classified as strictly ketogenic.
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Creator: WishartLab Created On: August 01, 2013 at 13:54 Last Updated: August 01, 2013 at 13:54 |
PW064779View Pathway |
Valine,leucine,isoleucine degradationHomo sapiens
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Creator: Carin Li Created On: June 25, 2018 at 14:08 Last Updated: June 25, 2018 at 14:08 |
PW132221View Pathway |
Valproate bismuth Drug MetabolismHomo sapiens
Valproate bismuth is a drug that is not metabolized by the human body as determined by current research and biotransformer analysis. Valproate bismuth passes through the liver and is then excreted from the body mainly through the kidney.
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Creator: Ray Kruger Created On: September 21, 2023 at 20:14 Last Updated: September 21, 2023 at 20:14 |
PW146698View Pathway |
drug action
Valproate bismuth Drug Metabolism Action PathwayHomo sapiens
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Creator: Ray Kruger Created On: October 07, 2023 at 18:49 Last Updated: October 07, 2023 at 18:49 |
PW124228View Pathway |
drug action
Valproate w/ Template (New) Drug Action Action PathwayHomo sapiens
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Creator: Nitya Khetarpal Created On: October 15, 2020 at 21:45 Last Updated: October 15, 2020 at 21:45 |
PW124164View Pathway |
drug action
Valproic Acid (Drug Action) - New - DISCARDHomo sapiens
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Creator: Nitya Khetarpal Created On: September 16, 2020 at 08:07 Last Updated: September 16, 2020 at 08:07 |
PW144440View Pathway |
drug action
Valproic acid Drug Metabolism Action PathwayHomo sapiens
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Creator: Ray Kruger Created On: October 07, 2023 at 13:38 Last Updated: October 07, 2023 at 13:38 |
PW124475View Pathway |
drug action
Valproic Acid i.e. Sodium Valproate (New: Drug Action)Homo sapiens
Sodium valproate, also known as valproic acid, is a fatty acid derivative and anticonvulsant first synthesized in 1881-1882 from an analogue derived from the Valerian herb; however, its mechanism of action is not fully elucidated (yet). Traditionally, researchers and clinicians consider it to be an anticonvulsant due to its effects in the brain: it blocks voltage-gated sodium channels and potentiates gamma-aminobutyric acid (GABA) activity. Over the past centuries, investigations show valproate may also have neuroprotective, anti-manic, and anti-migraine effects. It is a compound of interest in the field of oncology for its anti-proliferative effects and has undergone some clinical trials. Currently, valproate is indicated for use as a monotherapy or adjunct medication in seizure management, for migraine prophylaxis, and for mitigation of acute mania associated with bipolar disorder. Off-label, clinicians may use valproate to manage bipolar disorder or for emergency treatment of status epilepticus. Valproate can be administered orally, in which case it undergoes hepatic first-pass metabolism to enter the bloodstream ___________________ https://go.drugbank.com/drugs/DB00313
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Creator: Nitya Khetarpal Created On: January 24, 2021 at 01:14 Last Updated: January 24, 2021 at 01:14 |