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PathWhiz ID Pathway Meta Data

PW002490

Pw002490 View Pathway
metabolic

Leucine Degradation

Saccharomyces cerevisiae
The degradation of L-leucine starts either in the mitochondria or the cytosol. L-leucine reacts with 2-oxoglutarate through a branch-chain amino acid aminotransferase resulting in the release of ketoleucine and glutamate. The latter compound reacts with ketoisocaproate decarboxylase resulting in the release of carbon dioxide and 3-methylbutanal. The latter compound can then be turned into 3-methylbutanol through a alcohol dehydrogenase

PW013301

Pw013301 View Pathway
metabolic

Leucine degradation

Bacteria
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PW002541

Pw002541 View Pathway
metabolic

Leucine Degradation

Arabidopsis thaliana
The degradation of L-leucine starts either in the mitochondria, the cytosol or the chloroplast. L-leucine reacts with 2-oxoglutarate through a branch-chain amino acid aminotransferase resulting in the release of ketoleucine and glutamate. Ketoleucine reacts with coenzyme a through a NAD dependent branched chain keto-acid dehydrogenase complex resulting in the release of NADH, carbon dioxide and isovaleryl-CoA. Isovaleryl-CoA reacts with an oxidized electron flavoprotein resulting in the release of a reduced flavoprotein and a methylcrotonyl-CoA. The latter reacts with ATP and hydrogen carbonate through a 3-methylcrotonyl-CoA carboxylase resulting in the release of phosphate, ADP, hydrogen ion and 3-methylglutaconyl-CoA. The latter compound reacts with water through a methylglutaconyl-CoA hydratase resulting in the release of hydroxy-3-methylglutaryl-CoA. The latter reacts with a hydroxymethylglutaryl-CoA lyase resulting in the release of acetyl-CoA and acetoacetate.

PW109051

Pw109051 View Pathway
signaling

Leucine Stimulation on Insulin Signaling

Rattus norvegicus
The branched chain amino acid (BCAA) leucine is able to signal transduction pathways that modulate translation initiation for protein synthesis in skeleton muscles. In the presence of leucine, hyperphosphorylation of 4E-BP1 causes its affinity for eIF4E to be lowered. This allows eIF4F protein complexes to recognize, unfold and guide the mRNA to the 43S preinitiation complex thereby increasing translation initiation. In addition, leucine has a transient affect on the release of insulin and/or enhances sensitivity of muscle cells to insulin. A culmination of both signals at the mammalian target of rapamycin (mTOR) and perhaps other signaling, such as PKCδ, are needed for maximum translation initiation to occur.

PW109041

Pw109041 View Pathway
signaling

Leucine Stimulation on Insulin Signaling

Bos taurus
The branched chain amino acid (BCAA) leucine is able to signal transduction pathways that modulate translation initiation for protein synthesis in skeleton muscles. In the presence of leucine, hyperphosphorylation of 4E-BP1 causes its affinity for eIF4E to be lowered. This allows eIF4F protein complexes to recognize, unfold and guide the mRNA to the 43S preinitiation complex thereby increasing translation initiation. In addition, leucine has a transient affect on the release of insulin and/or enhances sensitivity of muscle cells to insulin. A culmination of both signals at the mammalian target of rapamycin (mTOR) and perhaps other signaling, such as PKCδ, are needed for maximum translation initiation to occur.

PW109030

Pw109030 View Pathway
signaling

Leucine Stimulation on Insulin Signaling

Mus musculus
The branched chain amino acid (BCAA) leucine is able to signal transduction pathways that modulate translation initiation for protein synthesis in skeleton muscles. In the presence of leucine, hyperphosphorylation of 4E-BP1 causes its affinity for eIF4E to be lowered. This allows eIF4F protein complexes to recognize, unfold and guide the mRNA to the 43S preinitiation complex thereby increasing translation initiation. In addition, leucine has a transient affect on the release of insulin and/or enhances sensitivity of muscle cells to insulin. A culmination of both signals at the mammalian target of rapamycin (mTOR) and perhaps other signaling, such as PKCδ, are needed for maximum translation initiation to occur.

PW000659

Pw000659 View Pathway
signaling

Leucine Stimulation on Insulin Signaling

Homo sapiens
The branched chain amino acid (BCAA) leucine is able to signal transduction pathways that modulate translation initiation for protein synthesis in skeleton muscles. In the presence of leucine, hyperphosphorylation of 4E-BP1 causes its affinity for eIF4E to be lowered. This allows eIF4F protein complexes to recognize, unfold and guide the mRNA to the 43S preinitiation complex thereby increasing translation initiation. In addition, leucine has a transient affect on the release of insulin and/or enhances sensitivity of muscle cells to insulin. A culmination of both signals at the mammalian target of rapamycin (mTOR) and perhaps other signaling, such as PKCδ, are needed for maximum translation initiation to occur.

PW121764

Pw121764 View Pathway
disease

Leukotriene C4 Synthesis Deficiency

Mus musculus
Leukotriene C4 synthetase deficiency is caused by a defect in the enzyme leukotriene C4 synthetase (LTC4S). This enzyme catalyzes the synthesis of leukotriene C4 (LTC4) through conjugation of LTA4 with reduced glutathione (GSH), which is synthesized by glutathione synthetase. Leukotriene C4 and its receptor-binding metabolites LTD4 and LTE4 are cysteinyl leukotrienes that are potent lipid mediators of tissue inflammation. In general, leukotrienes are potent proinflammatory mediators synthesized from membrane-derived arachidonic acid after activation of certain granulocytes. A defect in LTC4 results in decreased concentrations of cysteinyl leukotrienes LTC4, LTD4 and LTE4 in plasma, spinal fluid and urine. Symptoms include early death, failure to thrive, motor retardation, microcephaly, and progressive neurological defect.

PW000118

Pw000118 View Pathway
disease

Leukotriene C4 Synthesis Deficiency

Homo sapiens
Leukotriene C4 synthetase deficiency is caused by a defect in the enzyme leukotriene C4 synthetase (LTC4S). This enzyme catalyzes the synthesis of leukotriene C4 (LTC4) through conjugation of LTA4 with reduced glutathione (GSH), which is synthesized by glutathione synthetase. Leukotriene C4 and its receptor-binding metabolites LTD4 and LTE4 are cysteinyl leukotrienes that are potent lipid mediators of tissue inflammation. In general, leukotrienes are potent proinflammatory mediators synthesized from membrane-derived arachidonic acid after activation of certain granulocytes. A defect in LTC4 results in decreased concentrations of cysteinyl leukotrienes LTC4, LTD4 and LTE4 in plasma, spinal fluid and urine. Symptoms include early death, failure to thrive, motor retardation, microcephaly, and progressive neurological defect.

PW121989

Pw121989 View Pathway
disease

Leukotriene C4 Synthesis Deficiency

Rattus norvegicus
Leukotriene C4 synthetase deficiency is caused by a defect in the enzyme leukotriene C4 synthetase (LTC4S). This enzyme catalyzes the synthesis of leukotriene C4 (LTC4) through conjugation of LTA4 with reduced glutathione (GSH), which is synthesized by glutathione synthetase. Leukotriene C4 and its receptor-binding metabolites LTD4 and LTE4 are cysteinyl leukotrienes that are potent lipid mediators of tissue inflammation. In general, leukotrienes are potent proinflammatory mediators synthesized from membrane-derived arachidonic acid after activation of certain granulocytes. A defect in LTC4 results in decreased concentrations of cysteinyl leukotrienes LTC4, LTD4 and LTE4 in plasma, spinal fluid and urine. Symptoms include early death, failure to thrive, motor retardation, microcephaly, and progressive neurological defect.