Pyrroline-5-carboxylate reductase

From Wikipedia, the free encyclopedia
Jump to: navigation, search
pyrroline-5-carboxylate reductase
Pyrroline-5-carboxylate reductase dekamer, Human
EC number
CAS number 9029-17-8
IntEnz IntEnz view
ExPASy NiceZyme view
MetaCyc metabolic pathway
PRIAM profile
PDB structures RCSB PDB PDBe PDBsum
Gene Ontology AmiGO / EGO

In enzymology, a pyrroline-5-carboxylate reductase (EC 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.

Structural studies[edit]

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


  • Adams E; 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, Buckley SD (1957). "Enzymatic synthesis of L-pipecolic acid and L-proline". J. Biol. Chem. 229 (2): 789–800. PMID 13502341. 
  • Smith ME; Greenberg DM. "Characterization of an enzyme reducing pyrroline-5-carboxylate to proline". N. Lond. Nature: 1130. 
  • Yura T; Vogel HJ (1959). "Pyrroline-5-carboxylate reductase of Neurospora crassa: partial purification and some properties". J. Biol. Chem. 234: 335–338.