Targeted Gene Deletions for Polysaccharide Slime Formers

摘要

The present invention provides improved polysaccharides (e.g., gellan and diutan) produced by mutant gene R, M or N Sphingomonas strains containing at least one genetic modification that favors slime-forming polysaccharide production. Methods of making the mutant Sphingomonas strains and the culture broth containing such mutant Sphingomonas strains are also provided.

主权项

1. A Sphingomonas mutant strain comprising a mutation in gelM gene, wherein said Sphingomonas mutant strain has been genetically engineered to eliminate expression of gene gelM.