Pyrroline-5-carboxylate reductase

From Wikipedia, the free encyclopedia

In enzymology, a pyrroline-5-carboxylate reductase (EC 1.5.1.2) is an enzyme that catalyzes the chemical reaction

L-proline + NAD(P)+ 1-pyrroline-5-carboxylate + NAD(P)H + H⁺

The 3 substrates of this enzyme are L-proline, NAD⁺, and NADP⁺, whereas its 4 products are 1-pyrroline-5-carboxylate, NADH, NADPH, and H⁺.

This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-NH group of donors with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is L-proline:NAD(P)+ 5-oxidoreductase. Other names in common use include proline oxidase, L-proline oxidase, 1-pyrroline-5-carboxylate reductase, NADPH-L-Delta1-pyrroline carboxylic acid reductase, and L-proline-NAD(P)+ 5-oxidoreductase. This enzyme participates in arginine and proline metabolism.

Contents 1 Structural studies 2 References 3 External links 3.1 Gene Ontology (GO) codes

[edit] Structural studies

As of late 2007, 5 structures have been solved for this class of enzymes, with PDB accession codes 2AHR, 2GER, 2GR9, 2GRA, and 2IZZ.

[edit] References

• IUBMB entry for 1.5.1.2
• BRENDA references for 1.5.1.2 (Recommended.)
• PubMed references for 1.5.1.2
• PubMed Central references for 1.5.1.2
• Google Scholar references for 1.5.1.2
• Adams E and Goldstone A (1960). "Hydroxyproline metabolism. III. Enzymatic synthesis of hydroxyproline from Delta1-pyrroline-3-hydroxy-5-carboxylate". J. Biol. Chem. 235: 3499–3503. 
• Meister A, Radhakrishnan AN and Buckley SD (1957). "Enzymatic synthesis of L-pipecolic acid and L-proline". J. Biol. Chem. 229: 789–800. 
• Smith ME and Greenberg DM (Lond.). "Characterization of an enzyme reducing pyrroline-5-carboxylate to proline". N Nature: 1130. 
• Yura T and Vogel HJ (1959). "Pyrroline-5-carboxylate reductase of Neurospora crassa: partial purification and some properties". J. Biol. Chem. 234: 335–338. 

[edit] External links

The CAS registry number for this enzyme class is 9029-17-8.

• IUBMB entry for 1.5.1.2

• KEGG entry for 1.5.1.2

• BRENDA entry for 1.5.1.2

• NiceZyme view of 1.5.1.2

• EC2PDB: PDB structures for 1.5.1.2

• PRIAM entry for 1.5.1.2

• PUMA2 entry for 1.5.1.2

• IntEnz: Integrated Enzyme entry for 1.5.1.2

• MetaCyc entry for 1.5.1.2

• Atomic-resolution structures of enzymes belonging to this class

[edit] Gene Ontology (GO) codes

• EGO entry for GO code 0004735: pyrroline-5-carboxylate reductase

• AMIGO entry for GO code 0004735: pyrroline-5-carboxylate reductase

v • d • e Metabolism: amino acid metabolism - synthesis and catabolism enzymes (essential in CAPS) K→acetyl-CoA LYSINE→ Saccharopine dehydrogenase - Glutaryl-CoA dehydrogenase LEUCINE→ Branched chain aminotransferase - Branched-chain alpha-keto acid dehydrogenase complex - Isovaleryl coenzyme A dehydrogenase - Methylcrotonyl-CoA carboxylase - Methylglutaconyl-CoA hydratase - 3-hydroxy-3-methylglutaryl-CoA lyase TRYPTOPHAN→ Indoleamine 2,3-dioxygenase/Tryptophan 2,3-dioxygenase - Arylformamidase - Kynureninase - 3-hydroxyanthranilate oxidase - Aminocarboxymuconate-semialdehyde decarboxylase - Aminomuconate-semialdehyde dehydrogenase PHENYLALANINE→tyrosine→ (see below) G→pyruvate glycine→serine→ Serine hydroxymethyltransferase - Serine dehydratase alanine→ Alanine transaminase cysteine→ D-cysteine desulfhydrase threonine→ L-threonine dehydrogenase G→glutamate HISTIDINE→ Histidine ammonia-lyase - Urocanate hydratase - Formiminotransferase cyclodeaminase proline→ Proline oxidase - Pyrroline-5-carboxylate reductase - 1-Pyrroline-5-carboxylate dehydrogenase/ALDH4A1 - PYCR1 arginine→ Ornithine aminotransferase - Ornithine decarboxylase - Agmatinase →alpha-ketoglutarate→TCA Glutamate dehydrogenase G→propionyl-CoA VALINE→ Branched chain aminotransferase - Branched-chain alpha-keto acid dehydrogenase complex - Enoyl-CoA hydratase - 3-hydroxyisobutyryl-CoA hydrolase - 3-hydroxyisobutyrate dehydrogenase - Methylmalonate semialdehyde dehydrogenase ISOLEUCINE→ Branched chain aminotransferase - Branched-chain alpha-keto acid dehydrogenase complex - 3-hydroxy-2-methylbutyryl-CoA dehydrogenase METHIONINE→ Methionine adenosyltransferase - Adenosylhomocysteinase - Cystathionine beta synthase - Cystathionine gamma-lyase (methionine synthesis: MTR/Homocysteine methyltransferase) THREONINE→ Threonine aldolase →succinyl-CoA→TCA Propionyl-CoA carboxylase - Methylmalonyl-CoA mutase G→fumarate PHENYLALANINE→tyrosine→ Phenylalanine hydroxylase - Tyrosine aminotransferase - 4-Hydroxyphenylpyruvate dioxygenase - Homogentisate 1,2-dioxygenase - Fumarylacetoacetate hydrolase G→oxaloacetate asparagine→aspartate→ Asparaginase/Asparagine synthetase - Aspartate transaminase Other tyrosine→melanin Tyrosinase cysteine+glutamate→glutathione Gamma-glutamylcysteine synthetase - Glutathione synthetase - Gamma-glutamyl transpeptidase glycine→creatine Guanidinoacetate N-methyltransferase - Creatine kinase glutamate→glutamine Glutamine synthetase - Glutaminase proline+lysine→collagen Prolyl hydroxylase - Lysyl hydroxylase see also disorders, intermediates