KEGG   ENZYME: 2.5.1.95
Entry
EC 2.5.1.95                 Enzyme                                 
Name
xanthan ketal pyruvate transferase;
KPT
Class
Transferases;
Transferring alkyl or aryl groups, other than methyl groups;
Transferring alkyl or aryl groups, other than methyl groups (only sub-subclass identified to date)
Sysname
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
Reaction(IUBMB)
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 = 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 [RN:R09760]
Reaction(KEGG)
R09760
Substrate
phosphoenolpyruvate [CPD:C00074];
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
Product
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 [CPD:C19870];
phosphate [CPD:C00009]
Comment
Involved in the biosynthesis of the polysaccharide xanthan. 30-40% of the terminal mannose residues of xanthan have a 4,6-O-(1-carboxyethan-1,1-diyl) ketal group. It also acts on the 6-O-acetyl derivative of the inner mannose unit.
History
EC 2.5.1.95 created 2011, modified 2012
Reference
1  [PMID:1657892]
  Authors
Marzocca MP, Harding NE, Petroni EA, Cleary JM, Ielpi L
  Title
Location and cloning of the ketal pyruvate transferase gene of Xanthomonas campestris.
  Journal
J Bacteriol 173:7519-24 (1991)
DOI:10.1128/JB.173.23.7519-7524.1991
Other DBs
ExplorEnz - The Enzyme Database: 2.5.1.95
IUBMB Enzyme Nomenclature: 2.5.1.95
ExPASy - ENZYME nomenclature database: 2.5.1.95
BRENDA, the Enzyme Database: 2.5.1.95

  All links  
Chemical substance (4)   
   KEGG COMPOUND (4)   
Chemical reaction (2)   
   KEGG REACTION (1)   
   KEGG RCLASS (1)   
All databases (6)   

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