PYCR1

Pyrroline-5-carboxylate reductase 1

PDB rendering based on 2ger.

Available structures

Ortholog search: PDBe, RCSB

List of PDB id codes
2GER, 2GR9, 2GRA, 2IZZ

Identifiers

Symbols

PYCR1 ; ARCL2B; ARCL3B; P5C; P5CR; PIG45; PP222; PRO3; PYCR

External IDs

OMIM: 179035 MGI: 2384795 HomoloGene: 56002 GeneCards: PYCR1 Gene

EC number

1.5.1.2

Gene ontology
Molecular function	• pyrroline-5-carboxylate reductase activity • protein binding • identical protein binding
Cellular component	• mitochondrion • mitochondrial matrix
Biological process	• proline biosynthetic process • cellular amino acid biosynthetic process • cellular response to oxidative stress • cellular nitrogen compound metabolic process • small molecule metabolic process • regulation of mitochondrial membrane potential • oxidation-reduction process • L-proline biosynthetic process • negative regulation of hydrogen peroxide-induced cell death
Sources: Amigo / QuickGO

RNA expression pattern

More reference expression data

Orthologs

Species

Human

Mouse

RefSeq (mRNA)

RefSeq (protein)

Location (UCSC)

Chr 17:
81.93 – 81.94 Mb

Chr 11:
120.64 – 120.64 Mb

PubMed search

Pyrroline-5-carboxylate reductase 1, mitochondrial is an enzyme that in humans is encoded by the PYCR1 gene.^[1]^[2]

This gene encodes an enzyme that catalyzes the NAD(P)H-dependent conversion of pyrroline-5-carboxylate to proline. This enzyme may also play a physiologic role in the generation of NADP(+) in some cell types. The protein forms a homopolymer and localizes to the mitochondrion. Alternate splicing results in two transcript variants encoding different isoforms.^[2]

References

↑ Dougherty KM, Brandriss MC, Valle D (Feb 1992). "Cloning human pyrroline-5-carboxylate reductase cDNA by complementation in Saccharomyces cerevisiae". J Biol Chem 267 (2): 871–5. PMID 1730675.
1 2 "Entrez Gene: PYCR1 pyrroline-5-carboxylate reductase 1".

Herzfeld A, Legg MA, Greengard O (1978). "Human colon tumors: enzymic and histological characteristics". Cancer 42 (3): 1280–3. doi:10.1002/1097-0142(197809)42:3<1280::AID-CNCR2820420337>3.0.CO;2-P. PMID 212173.
Merrill MJ, Yeh GC, Phang JM (1989). "Purified human erythrocyte pyrroline-5-carboxylate reductase. Preferential oxidation of NADPH". J. Biol. Chem. 264 (16): 9352–8. PMID 2722838.
Yeh GC, Roth EF, Phang JM, et al. (1984). "The effect of pyrroline-5-carboxylic acid on nucleotide metabolism in erythrocytes from normal and glucose-6-phosphate dehydrogenase-deficient subjects". J. Biol. Chem. 259 (9): 5454–8. PMID 6201483.
Herzfeld A, Greengard O (1981). "Enzyme activities in human fetal and neoplastic tissues". Cancer 46 (9): 2047–54. doi:10.1002/1097-0142(19801101)46:9<2047::AID-CNCR2820460924>3.0.CO;2-Q. PMID 6253048.
Yeh GC, Harris SC, Phang JM (1981). "Pyrroline-5-carboxylate reductase in human erythrocytes". J. Clin. Invest. 67 (4): 1042–6. doi:10.1172/JCI110115. PMC 370662. PMID 6894153.
Maruyama K, Sugano S (1994). "Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides". Gene 138 (1–2): 171–4. doi:10.1016/0378-1119(94)90802-8. PMID 8125298.
Basch JJ, Wickham ED, Farrell HM (1997). "Pyrroline-5-carboxylate reductase in lactating bovine mammary glands". J. Dairy Sci. 79 (8): 1361–8. doi:10.3168/jds.S0022-0302(96)76493-7. PMID 8880459.
Suzuki Y, Yoshitomo-Nakagawa K, Maruyama K, et al. (1997). "Construction and characterization of a full length-enriched and a 5'-end-enriched cDNA library". Gene 200 (1–2): 149–56. doi:10.1016/S0378-1119(97)00411-3. PMID 9373149.
Strausberg RL, Feingold EA, Grouse LH, et al. (2003). "Generation and initial analysis of more than 15,000 full-length human and mouse cDNA sequences". Proc. Natl. Acad. Sci. U.S.A. 99 (26): 16899–903. doi:10.1073/pnas.242603899. PMC 139241. PMID 12477932.
Gerhard DS, Wagner L, Feingold EA, et al. (2004). "The Status, Quality, and Expansion of the NIH Full-Length cDNA Project: The Mammalian Gene Collection (MGC)". Genome Res. 14 (10B): 2121–7. doi:10.1101/gr.2596504. PMC 528928. PMID 15489334.
Meng Z, Lou Z, Liu Z, et al. (2006). "Crystal structure of human pyrroline-5-carboxylate reductase". J. Mol. Biol. 359 (5): 1364–77. doi:10.1016/j.jmb.2006.04.053. PMID 16730026.

PDB gallery

2ger: Crystal Structure and Oxidative Mechanism of Human Pyrroline-5-carboxylate Reductase

2gr9: Crystal structure of P5CR complexed with NADH

2gra: crystal structure of Human Pyrroline-5-carboxylate Reductase complexed with nadp

2izz: CRYSTAL STRUCTURE OF HUMAN PYRROLINE-5-CARBOXYLATE REDUCTASE

Metabolism: Protein metabolism, synthesis and catabolism enzymes

Essential amino acids are in Capitals

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
→citrate

glycine→serine→	Serine hydroxymethyltransferase Serine dehydratase glycine→creatine: Guanidinoacetate N-methyltransferase Creatine kinase

alanine→	Alanine transaminase

cysteine→	D-cysteine desulfhydrase

threonine→	L-threonine dehydrogenase

G→glutamate→
α-ketoglutarate

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

Other	cysteine+glutamate→glutathione: Gamma-glutamylcysteine synthetase Glutathione synthetase Gamma-glutamyl transpeptidase glutamate→glutamine: Glutamine synthetase Glutaminase

G→propionyl-CoA→
succinyl-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→	generation of homocysteine: Methionine adenosyltransferase Adenosylhomocysteinase regeneration of methionine: Methionine synthase/Homocysteine methyltransferase Betaine-homocysteine methyltransferase conversion to cysteine: Cystathionine beta synthase Cystathionine gamma-lyase

THREONINE→	Threonine aldolase

→succinyl-CoA→TCA	Propionyl-CoA carboxylase Methylmalonyl CoA epimerase Methylmalonyl-CoA mutase

G→fumarate

PHENYLALANINE→tyrosine→	Phenylalanine hydroxylase Tyrosine aminotransferase 4-Hydroxyphenylpyruvate dioxygenase Homogentisate 1,2-dioxygenase Fumarylacetoacetate hydrolase tyrosine→melanin: Tyrosinase

G→oxaloacetate

asparagine→aspartate→	Asparaginase/Asparagine synthetase Aspartate transaminase

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PYCR1

References

Further reading