Carboxysome shell vertex protein CsoS4B

UniProtKB accession:  O85044

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Probably forms vertices in the carboxysome. Has been modeled to induce curvature upon insertion into an otherwise flat hexagonal layer of major carboxysome subunits (Probable). A minor shell protein, only 12 pentamers of CsoS4A/CsoS4B are calculated to be present in each carboxysome. The 2 CsoS4 proteins contribute to the impermeability of the carboxysome to CO(2) (PubMed:19844578). Its central pore is probably too small to allow passage of metabolites; its function might be to anchor different proteins or metabolites to the carboxysome (Probable).