ID   2.5.1.95
DE   xanthan pyruvate transferase.
CA   beta-D-Man-(1->4)-beta-D-GlcA-(1->2)-alpha-D-Man-(1->3)-beta-D-Glc-
CA   (1->4)-alpha-D-Glc-di-trans,octa-cis-undecaprenyl diphosphate +
CA   phosphoenolpyruvate = 4,6-Me(COOH)C-beta-D-Man-(1->4)-beta-D-GlcA-(1->2)-
CA   alpha-D-Man-(1->3)-beta-D-Glc-(1->4)-alpha-D-Glc-di-trans,octa-
CA   cis-undecaprenyl diphosphate + phosphate.
CC   -!- Involved in the biosynthesis of the polysaccharide xanthan.
CC   -!- 30-40% of terminal mannose residues of xanthan have a 4,6-O-
CC       (1-carboxyethan-1,1-diyl) ketal group.
CC   -!- It also acts on the 6-O-acetyl derivative of the inner mannose unit.
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