Cellobiose phosphorylase

cellobiose phosphorylase
Cellobiose phosphorylase dimer, Cellulomonas uda
Identifiers
EC no.	2.4.1.20
CAS no.	9030-20-0
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Gene Ontology	AmiGO / QuickGO
Search PMC articles PubMed articles NCBI proteins

In enzymology, a cellobiose phosphorylase (EC 2.4.1.20) is an enzyme that catalyzes the chemical reaction

cellobiose + phosphate ${\displaystyle \rightleftharpoons }$ alpha-D-glucose 1-phosphate + D-glucose

Thus, the two substrates of this enzyme are cellobiose and phosphate, whereas its two products are alpha-D-glucose 1-phosphate and D-glucose.

This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is cellobiose:phosphate alpha-D-glucosyltransferase. This enzyme participates in starch and sucrose metabolism.

As of late 2006, two structures have been solved for this class of enzymes, with PDB accession codes 2CQS and 2CQT.

• Alexander JK (June 1968). "Purification and specificity of cellobiose phosphorylase from Clostridium thermocellum". The Journal of Biological Chemistry. 243 (11): 2899–904. doi:10.1016/S0021-9258(18)93356-9. PMID 5653182.
• Ayers WA (November 1959). "Phosphorolysis and synthesis of cellobiose by cell extracts from Ruminococcus flavefaciens". The Journal of Biological Chemistry. 234 (11): 2819–22. doi:10.1016/S0021-9258(18)69677-2. PMID 13795349.