en>David Eppstein: /* Bounds on the size of universal point sets */ update re Mondal and Kurowski

2013-08-11T02:34:00Z

Bounds on the size of universal point sets: update re Mondal and Kurowski

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{{Infobox enzyme
| Name = Rhizobium leguminosarum exopolysaccharide glucosyl ketal-pyruvate-transferase
| EC_number = 2.5.1.98
| CAS_number =
| IUBMB_EC_number = 2/5/1/98
| GO_code =
| image =
| width =
| caption =
}}
'''Rhizobium leguminosarum exopolysaccharide glucosyl ketal-pyruvate-transferase''' ({{EC number|2.5.1.98}}, ''PssM'') is an [[enzyme]] with system name ''phosphoenolpyruvate:(D-GlcA-beta-(1->4)-2-O-Ac-D-GlcA-beta-(1->4)-D-Glc-beta-(1->4)-(3-O-CH3-CH2CH(OH)C(O)-D-Gal-beta-(1->4)-D-Glc-beta-(1->4)-D-Glc-beta-(1->4)-D-Glc-beta-(1->6))-2(or3)-O-Ac-D-Glc-alpha-(1->6))n 4,6-O-(1-carboxyethan-1,1-diyl)transferase ''.<ref>{{cite journal | title = Mutation in the ''pssM'' gene encoding ketal pyruvate transferase leads to disruption of ''Rhizobium leguminosarum'' bv. ''viciae''—''Pisum sativum'' symbiosis |author = Ivashina, T.V., Fedorova, E.E., Ashina, N.P., Kalinchuk, N.A., Druzhinina, T.N., Shashkov, A.S., Shibaev, V.N. and Ksenzenko, V.N. |journal = J. Appl. Microbiol. |year = 2010 |volume = 109 |pages = 731–742 |pmid = 20233262 | issue = 2 | doi = 10.1111/j.1365-2672.2010.04702.x}}</ref> This enzyme [[catalysis|catalyses]] the following [[chemical reaction]]

: [[phosphoenolpyruvate]] + [D-GlcA-beta-(1->4)-2-O-Ac-D-GlcA-beta-(1->4)-D-Glc-beta-(1->4)-[3-O-CH3-CH2CH(OH)C(O)-D-Gal-beta-(1->4)-D-Glc-beta-(1->4)-D-Glc-beta-(1->4)-D-Glc-beta-(1->6)]-2(or3)-O-Ac-D-Glc-alpha-(1->6)]<sub>n</sub> <math>\rightleftharpoons</math> [D-GlcA-beta-(1->4)-2-O-Ac-D-GlcA-beta-(1->4)-D-Glc-beta-(1->4)-[3-O-CH3-CH2CH(OH)C(O)-D-Gal-beta-(1->3)-4,6-CH3(COO-)C-D-Glc-beta-(1->4)-D-Glc-beta-(1->4)-D-Glc-beta-(1->6)]-2(or3)-O-Ac-D-Glc-alpha-(1->6)]<sub>n</sub> + [[phosphate]]

The enzyme is responsible for pyruvylation of subterminal [[glucose]] in the acidic [[octasaccharide]] repeating unit of the [[exopolysaccharide]] of ''[[Rhizobium leguminosarum]]''.

== References ==
{{reflist}}

== External links ==
*{{MeshName|Rhizobium+leguminosarum+exopolysaccharide+glucosyl+ketal-pyruvate-transferase}}

[[Category:EC 2.5.1]]

Universal point set - Revision history

en>David Eppstein: /* Bounds on the size of universal point sets */ update re Mondal and Kurowski