EC Number   |
General Information |
Reference |
|---|
  2.4.1.251 | malfunction |
decreased amount of the exopolysaccharide produced by the gumI mutant strain SJ1021 may be due to incomplete polymerization of the tetrasaccharide repeating units. Although this strain is not fully capable of producing the pentasaccharide repeating units, the absence of a terminal mannose residue in xanthan does not affect the full virulence of Xanthomonas oryzae |
702828 |
| 2.4.1.251 | malfunction |
from the biochemical analysis of a defined set of Xanthomonas campestris gum mutants, experimental data are reported for assigning functions to the products of the gum genes. Inactivation of gumK completely abolishes in vitro polymer formation. Permeabilized cells are incubated with UDP-glucose, GDPmannose, and UDP-glucuronic acid, one of them labeled in the sugar moiety. Accumulating intermediates are analysed. Accumulation of GlcA-beta-(1->2)-D-Man-alpha-(1->3)-D-Glc-beta-(1->4)-D-Glc-alpha1-diphospho-(lipid carrier) in the gumI deletion strain. Mutations in gumI have less effect on the amount of in vitro produced polysaccharide. The gumI deletion strain produces about 10% of the polymer amount produced by the wild-type strain |
704257 |
| 2.4.1.251 | physiological function |
GumI is involved in biosynthesis of the pentasaccharide repeating unit of xanthan |
702828 |
| 2.4.1.251 | physiological function |
the enzyme is involved in biosynthesis of xanthan |
704257 |
