Reaction: 5-aminopentanoate + lipoate = D-proline + dihydrolipoate
For diagram click here.
Systematic name: 5-aminopentanoate:lipoate oxidoreductase (cyclizing)
Comments: The reaction is observed only in the direction of D-proline reduction. Other dithiols can function as reducing agents; the enzyme contains a pyruvoyl group and a selenocysteine residue, both essential for activity.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 37255-43-9
1. Hodgins, D.S. and Abeles, R.H. Studies of the mechanism of action of D-proline reductase: the presence on covalently bound pyruvate and its role in the catalytic process. Arch. Biochem. Biophys. 130 (1969) 274-285. [PMID: 5778643]
2. Stadtman, T.C. and Elliott, P. Studies on the enzymic reduction of amino acids. II. Purification and properties of a D-proline reductase and a proline racemase from Clostridium sticklandii. J. Biol. Chem. 228 (1957) 983-997.
3. Kabisch, U.C., Gräntzdörffer, A., Schierhorn, A., Rücknagel, K.P, Andreesen, J.R. and Pich, A. Identification of D-proline reductase from Clostridium sticklandii as a selenoenzyme and indications for a catalytically active pyruvoyl group derived from a cysteine residue by cleavage of a proprotein. J. Biol. Chem. 274 (1999) 8445-8454. [PMID: 10085076]