Xanthan ketal pyruvate transferase

{{Infobox enzyme

| Name = Xanthan ketal pyruvate transferase

| EC_number = 2.5.1.95

| CAS_number =

| GO_code =

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Xanthan ketal pyruvate transferase ({{EC number|2.5.1.95}}, KPT) is an enzyme with systematic name phosphoenolpyruvate:D-Man-beta-(1->4)-GlcA-beta-(1->2)-D-Man-alpha-(1->3)-D-Glc-beta-(1->4)-D-Glc-alpha-1-diphospho-ditrans,octacis-undecaprenol 4,6-O-(1-carboxyethan-1,1-diyl)transferase.{{cite journal | vauthors = Marzocca MP, Harding NE, Petroni EA, Cleary JM, Ielpi L | title = Location and cloning of the ketal pyruvate transferase gene of Xanthomonas campestris | journal = Journal of Bacteriology | volume = 173 | issue = 23 | pages = 7519–24 | date = December 1991 | pmid = 1657892 | pmc = 212518 }} This enzyme catalyses the following chemical reaction

: phosphoenolpyruvate + D-Man-beta-(1->4)-D-GlcA-beta-(1->2)-D-Man-alpha-(1->3)-D-Glc-beta-(1->4)-D-Glc-alpha-1-diphospho-ditrans,octacis-undecaprenol $\backslash rightleftharpoons$ {{chem name|4,6-CH3(COO-)C-D-Man-beta-(1->4)-D-GlcA-beta-(1->2)-D-Man-alpha-(1->3)-D-Glc-beta-(1->4)-D-Glc-alpha-1-diphospho-ditrans,octacis-undecaprenol}} + phosphate

This enzyme is involved in the biosynthesis of the polysaccharide xanthan.