Orthologs of Branching Enzymes from Cyanobacteria Accumulating Distinct Types of α-Glucans Share Common Reaction Product Specificity.

ABSTRACT: Cyanobacteria generally accumulate glycogen in their cells as a photosynthetic product. Interestingly, several unicellular diazotrophic species accumulate insoluble branched polysaccharide called cyanobacterial starch. Branching enzymes (BEs) belonging to glycoside hydrolase family 13 are universally found in the phylum cyanobacteria and are key enzymes in determining the branching pattern of polysaccharides. Many of the glycogen-producing cyanobacteria possess a single BE isozyme (BE1), while multiple BE isozymes (BE1, BE2, and BE3) are present in cyanobacterial starch-producing strains. A previous study suggested that the coexistence of three BE isozymes is essential for the trait of cyanobacterial starch-production. In this study, to obtain clues regarding the significance of the coexis

SUBMITTER: Kuroki M 

PROVIDER: S-EPMC12149516 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature