true1998-12-152024-03-2784RBS3_FRIAGPanico E.Baysdorfer C.1997-09EMBL/GenBank/DDBJNUCLEOTIDE SEQUENCE [MRNA]RuBisCO_smallRibulose bisphosphate carboxylase, small subunitRuBisCO_S_bactRuBisCO_ssuRuBisCO_ssu_domRuBisCO_ssu_NRuBisCO_ssu_sfRIBULOSE BISPHOSPHATE CARBOXYLASE SMALL CHAIN 1, CHLOROPLASTICRIBULOSE BISPHOSPHATE CARBOXYLASE SMALL SUBUNIT, CHLOROPLASTIC 2RbcSRuBisCO_smallRUBISCOSMALLRuBisCO_smallRuBisCO, small subunitRibulose bisphosphate carboxylase small subunit, chloroplastic 3RuBisCO small subunit 3RBCS3RuBisCO catalyzes two reactions: the carboxylation of D-ribulose 1,5-bisphosphate, the primary event in carbon dioxide fixation, as well as the oxidative fragmentation of the pentose substrate. Both reactions occur simultaneously and in competition at the same active site. Although the small subunit is not catalytic it is essential for maximal activity.Heterohexadecamer of 8 large and 8 small subunits.The basic functional RuBisCO is composed of a large chain homodimer in a 'head-to-tail' conformation. In form I RuBisCO this homodimer is arranged in a barrel-like tetramer with the small subunits forming a tetrameric 'cap' on each end of the 'barrel'.Belongs to the RuBisCO small chain family.Chloroplast158Ribulose bisphosphate carboxylase small subunit, chloroplastic 313984591791998-01-011true19615d1f64e663ac00c8a01e53d9862b0f117MASSATMLSSVATAARAAPAQASMVAPFVGLKSASAFPVTQKPATGLSTLPSNGGRVQCMKVWPIVGLKKFETLSYLPTLSVESLLKQIEYLIRNGWVPCLEFSLEGFVSRDNNKSPGYYDGRYWTMWKLPMFGCTDAAQVVKEAAECKKEYPAAFIRVIGFDNVRQVQCVSFIVEKPEtrue