ID 2.4.1.334 DE 1,3-alpha-oligoglucan phosphorylase. CA [(1->3)-alpha-D-glucosyl](n) + phosphate = [(1->3)-alpha-D-glucosyl](n-1) CA + beta-D-glucose 1-phosphate. CC -!- The enzyme, isolated from the bacterium Clostridium phytofermentans, CC catalyzes a reversible reaction. CC -!- Substrates for the phosphorolytic reaction are alpha-1,3-linked CC oligoglucans with a polymerisation degree of 3 or more. CC -!- Nigerose (i.e. 3-O-alpha-D-glucopyranosyl-D-glucopyranose) is not CC phosphorylyzed but can serve as substrate in the reverse direction CC (cf. EC 2.4.1.279). //