FEATURES

FAMILY

bacterial microcompartments protein family

DESCRIPTION

Also known as CCMK4_HALP7, ccmK4. A probably essential, minor shell protein of the carboxysome, a polyhedral inclusion where RuBisCO (ribulose bisphosphate carboxylase, rbcL-rbcS) is sequestered. Hexamers form sheets that form the facets of the polyhedral carboxysome. In PCC 7418 there are several CcmK paralogs with presumably functional differences. This subunit can probably make both homohexamers and heterohexamers with CcmK3. Both hexamers can also make dodecamers, formation depends on buffer conditions. Crystallizes as a homohexamer. Interacts stably with CcmK3, forming heterohexamers that can make dodecamers. Heterohexamers have a 1:2 CcmK3:CcmK4 stoichiometry. Upon expression in E.coli forms large aggregates.

Also known as CCMK4_HALP7, ccmK4. A probably essential, minor shell protein of the carboxysome, a polyhedral inclusion where RuBisCO (ribulose bisphosphate carboxylase, rbcL-rbcS) is sequestered. ...

EXTERNAL LINKS

ccmK4

Carboxysome shell protein CcmK4

ccmK4

Molecular Synopsis