Functional Cyanobacterial b-Carboxysomes Have an Absolute Requirement for Both Long and Short Forms of the CcmM Protein 1[W][OA]
Carboxysomes are an essential part of the cyanobacterial CO2-concentrating mechanism, consisting of a protein shell and an interior of Rubisco. The b-carboxysome shell protein CcmM forms two peptides via a proposed internal ribosomal entry site (IRES) within the ccmM transcript in Synechococcus PCC7942. The abundant short form (35 kD, M35) consists of Rubisco small subunit-like repeats and binds Rubisco. The lower abundance long form (58 kD, M58) also contains a g-carbonic anhydraselike domain,...[Show more]
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