KEGG   ENZYME: 2.4.1.334
Entry
EC 2.4.1.334                Enzyme                                 

Name
1,3-alpha-oligoglucan phosphorylase
Class
Transferases;
Glycosyltransferases;
Hexosyltransferases
Sysname
1,3-alpha-D-glucan:phosphate beta-D-glucosyltransferase
Reaction(IUBMB)
[(1->3)-alpha-D-glucosyl]n + phosphate = [(1->3)-alpha-D-glucosyl]n-1 + beta-D-glucose 1-phosphate
Reaction(KEGG)
(other) R11140
Substrate
[(1->3)-alpha-D-glucosyl]n [CPD:C02616];
phosphate [CPD:C00009]
Product
[(1->3)-alpha-D-glucosyl]n-1;
beta-D-glucose 1-phosphate [CPD:C00663]
Comment
The enzyme, isolated from the bacterium Clostridium phytofermentans, catalyses a reversible reaction. Substrates for the phosphorolytic reaction are alpha-1,3-linked oligoglucans with a polymerisation degree of 3 or more. Nigerose (i.e. 3-O-alpha-D-glucopyranosyl-D-glucopyranose) is not phosphorylyzed but can serve as substrate in the reverse direction (cf. EC 2.4.1.279, nigerose phosphorylase).
History
EC 2.4.1.334 created 2014
Reference
1
  Authors
Nihira, T., Nishimoto, M., Nakai, H., Ohtsubo, K., and Kitaoka, M.
  Title
Characterization of two phosphorylases for alpha-1,3-oligoglucans from Clostridium phytofermentans.
  Journal
J Appl Glycosci 61:59-66 (2014)
Other DBs
ExplorEnz - The Enzyme Database: 2.4.1.334
IUBMB Enzyme Nomenclature: 2.4.1.334
ExPASy - ENZYME nomenclature database: 2.4.1.334
BRENDA, the Enzyme Database: 2.4.1.334

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