Maltose phosphorylase explained

maltose phosphorylase
Ec Number:	2.4.1.8
Cas Number:	9030-19-7
Go Code:	0050082
Width:	270

In enzymology, a maltose phosphorylase is an enzyme that catalyzes the chemical reaction

maltose + phosphate

\rightleftharpoons 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

As of late 2007, only one structure has been solved for this class of enzymes, with the PDB accession code .

References

• 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 . 153 - 63 . 12999827 . 1 .
• Putman EW, Litt CF, Hassid WZ . 1955 . The structure of D-glucose-D-xylose synthesized by maltose phosphorylase . J. Am. Chem. Soc. . 77 . 4351 - 4353 . 10.1021/ja01621a050 . 16 .
• Wood BJ, Rainbow C . 1961 . The maltophosphorylase of beer lactobacilli . Biochem. J. . 78 . 204 - 209 . 13786484 . 1205197.