Reaction: (R)-pantolactone + NADP+ = 2-dehydropantolactone + NADPH + H+
Other name(s): 2-oxopantoyl lactone reductase; ketopantoyl lactone reductase; 2-ketopantoyl lactone reductase; 2-dehydropantoyl-lactone reductase (A-specific)
Systematic name: (R)-pantolactone:NADP+ oxidoreductase (A-specific)
Comments: The yeast enzyme differs from that from Escherichia coli [EC 1.1.1.214 2-dehydropantolactone reductase (B-specific)], which is specific for the B-face of NADP+, and in receptor requirements from EC 1.1.99.26 3-hydroxycyclohexanone dehydrogenase.
Links to other databases: BRENDA, EXPASY, KEGG, CAS registry number: 37211-75-9
References:
1. King, H.L., Jr. and Wilken, D.R. Ketopantoyl lactone and ketopantoic acid reductases. Characterization of the reactions and purification of two forms of ketopantoyl lactone reductase. J. Biol. Chem. 247 (1972) 4689-4695.
2. Wilken, D.R., King, H.L., Jr. and Dyar, R.E. Ketopantoic acid and ketopantoyl lactone reductases. Stereospecificity of transfer of hydrogen from reduced nicotinamide adenine dinucleotide phosphate. J. Biol. Chem. 250 (1975) 2311-2314. [PMID: 234966]