Xanthan ketal pyruvate transferase

Xanthan ketal pyruvate transferase (EC 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.^[1] 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

\rightleftharpoons

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.

References

↑ Marzocca, M.P.; Harding, N.E.; Petroni, E.A.; Cleary, J.M.; Ielpi, L. (1991). "Location and cloning of the ketal pyruvate transferase gene of Xanthomonas campestris". J. Bacteriol. 173 (23): 7519–7524. PMC 212518. PMID 1657892.

External links

Xanthan ketal pyruvate transferase at the US National Library of Medicine Medical Subject Headings (MeSH)

Transferases: alkyl and aryl (EC 2.5)

2.5.1	Dimethylallyltranstransferase Thiaminase I Methionine adenosyltransferase Riboflavin synthase Dihydropteroate synthase Spermidine synthase Glutathione S-transferase Farnesyl-diphosphate farnesyltransferase Spermine synthase Alkylglycerone phosphate synthase Farnesyltransferase Geranylgeranyltransferase type 1 Porphobilinogen deaminase

Enzymes

Activity	Active site Binding site Catalytic triad Oxyanion hole Enzyme promiscuity Catalytically perfect enzyme Coenzyme Cofactor Enzyme catalysis Enzyme kinetics Lineweaver–Burk plot Michaelis–Menten kinetics

Regulation	Allosteric regulation Cooperativity Enzyme inhibitor

Classification	EC number Enzyme superfamily Enzyme family List of enzymes

Types	EC1 Oxidoreductases (list) EC2 Transferases (list) EC3 Hydrolases (list) EC4 Lyases (list) EC5 Isomerases (list) EC6 Ligases (list)

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