EC 2 - Transferases
EC 2.5 - Transferring alkyl or aryl groups, other than methyl groups
EC 2.5.1 - Transferring alkyl or aryl groups, other than methyl groups
EC 2.5.1.98 - Rhizobium leguminosarum exopolysaccharide glucosyl ketal-pyruvate-transferase
IntEnz view
ENZYME view
IntEnz Enzyme Nomenclature
EC 2.5.1.98
Names
Accepted name:
Rhizobium leguminosarum exopolysaccharide glucosyl ketal-pyruvate-transferase
Other
names:
PssM
phosphoenolpyruvate:[D-GlcA-β-(1→4)-2-O-Ac-D-GlcA-β-(1→4)-D-Glc-β-(1→4)-[3-O-CH3-CH2CH(OH)C(O)-D-Gal-β-(1→4)-D-Glc-β-(1→4)-D-Glc-β-(1→4)-D-Glc-β-(1→6)]-2(or3)-O-Ac-D-Glc-α-(1→6)]n 4,6-O-(1-carboxyethan-1,1-diyl)transferase
phosphoenolpyruvate:[D-GlcA-β-(1→4)-2-O-Ac-D-GlcA-β-(1→4)-D-Glc-β-(1→4)-[3-O-CH3-CH2CH(OH)C(O)-D-Gal-β-(1→4)-D-Glc-β-(1→4)-D-Glc-β-(1→4)-D-Glc-β-(1→6)]-2(or3)-O-Ac-D-Glc-α-(1→6)]n 4,6-O-(1-carboxyethan-1,1-diyl)transferase
Systematic name:
phosphoenolpyruvate:[β-D-GlcA-β-(1→4)-2-O-Ac-β-D-GlcA-(1→4)-β-D-Glc-(1→4)-[3-O-(CH3-CH2CH(OH)C(O))-4,6-CH3(COO−)C-β-D-Gal-(1→4)-β-D-Glc-(1→4)-β-D-Glc-(1→4)-β-D-Glc-(1→6)]-2(or3)-O-Ac-α-D-Glc-(1→6)]n 4,6-O-(1-carboxyethan-1,1-diyl)transferase
Reaction
- phosphoenolpyruvate + [beta-D-GlcA-(1right4)-2-O-Ac-beta-D-GlcA-(1right4)-beta-D-Glc-(1right4)-[3-O-(CH3CH(OH)CH2C(O))-4,6-CH3(COO-)C-beta-D-Gal-(1right4)-beta-D-Glc-(1right4)-beta-D-Glc-(1right4)-beta-D-Glc-(1right6)]-2(or3)-O-Ac-alpha-D-Glc-(1right6)]n = [beta-D-GlcA-(1right4)-2-O-Ac-beta-D-GlcA-(1right4)-beta-D-Glc-(1right4)-[3-O-(CH3CH(OH)CH2C(O))-4,6-CH3(COO-)C-beta-D-Gal-(1right3)-4,6-CH3(COO-)C-beta-D-Glc-(1right4)-beta-D-Glc-(1right4)-beta-D-Glc-(1right6)]-2(or3)-O-Ac-alpha-D-Glc-(1right6)]n + phosphate
Comments:
The enzyme is responsible for pyruvylation of subterminal glucose in the acidic octasaccharide repeating unit of the exopolysaccharide of Rhizobium leguminosarum (bv. viciae strain VF39) which is necessary to establish nitrogen-fixing symbiosis with Pisum sativum, Vicia faba, and Vicia sativa.
Links to other databases
UniProtKB/Swiss-Prot:
PSSM_RHILV
References
-
Mutation in the pssM gene encoding ketal pyruvate transferase leads to disruption of Rhizobium leguminosarum bv. viciae-Pisum sativum symbiosis.J. Appl. Microbiol. 109 : 731-742 (2010). [PMID: 20233262]
[EC 2.5.1.98 created 2012, modified 2018]