enzymology, a maltose phosphorylase ( EC 18.104.22.168) is an enzyme that catalyzes the chemical reaction
maltose + phosphate
D-glucose + beta-D-glucose 1-phosphate
Thus, the two
substrates of this enzyme are maltose and phosphate, whereas its two products are D-glucose and beta-D-glucose 1-phosphate.
This enzyme belongs to the family of
glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is maltose:phosphate 1-beta-D-glucosyltransferase. This enzyme participates in starch and sucrose metabolism.
Structural studies [ edit ]
As of late 2007, only one
structure has been solved for this class of enzymes, with the PDB accession code 1H54.
References [ edit ]
Boyer, P.D., Lardy, H. and Myrback, K. (Eds.), The Enzymes, 2nd ed., vol. 5, Academic Press, New York, 1961, p. 229-236.
FITTING C, DOUDOROFF M (1952). "Phosphorolysis of maltose by enzyme preparations from Neisseria meningitidis". J. Biol. Chem. 199 (1): 153–63. PMID 12999827.
Putman EW, Litt CF and Hassid WZ (1955). "The structure of D-glucose-D-xylose synthesized by maltose phosphorylase". J. Am. Chem. Soc. 77 (16): 4351–4353. doi: 10.1021/ja01621a050.
Wood BJB and Rainbow C (1961). "The maltophosphorylase of beer lactobacilli". Biochem. J. 78: 204–209. PMC 1205197. PMID 13786484.