Reaction: 4-O-β-D-glucopyranosyl-D-gluconate + phosphate = α-D-glucose 1-phosphate + D-gluconate
Glossary: 4-O-β-D-glucopyranosyl-D-gluconate = cellobionate
Systematic name: 4-O-β-D-glucopyranosyl-D-gluconate:phosphate α-D-glucosyltransferase
Comments: The enzyme occurs in cellulolytic bacteria and fungi. It catalyses the reversible phosphorolysis of cellobionic acid. In the synthetic direction it produces 4-O-β-D-glucopyranosyl-D-glucuronate from α-D-glucose 1-phosphate and D-glucuronate with low activity
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number:
References:
1. Nihira, T., Saito, Y., Nishimoto, M., Kitaoka, M., Igarashi, K., Ohtsubo, K. and Nakai, H. Discovery of cellobionic acid phosphorylase in cellulolytic bacteria and fungi. FEBS Lett 587 (2013) 3556-3561. [PMID: 24055472]