EC Explorer

2.4.1.334

1,3-α-oligoglucan phosphorylase

[(1→3)-α-D-glucosyl]_n + phosphate = [(1→3)-α-D-glucosyl]_n-1 + β-D-glucose 1-phosphate

1,3-α-D-glucan:phosphate β-D-glucosyltransferase

The enzyme, isolated from the bacterium Clostridium phytofermentans, catalyses a reversible reaction. Substrates for the phosphorolytic reaction are α-1,3-linked oligoglucans with a polymerisation degree of 3 or more. Nigerose (i.e. 3-O-α-D-glucopyranosyl-D-glucopyranose) is not phosphorylyzed but can serve as substrate in the reverse direction (cf. EC 2.4.1.279, nigerose phosphorylase).

created 2014