ID M1WPC8_9NOST Unreviewed; 109 AA.
AC M1WPC8;
DT 01-MAY-2013, integrated into UniProtKB/TrEMBL.
DT 01-MAY-2013, sequence version 1.
DT 28-JUN-2023, entry version 25.
DE RecName: Full=Ribulose bisphosphate carboxylase small subunit {ECO:0000256|HAMAP-Rule:MF_00859};
DE Short=RuBisCO small subunit {ECO:0000256|HAMAP-Rule:MF_00859};
GN Name=cbbS {ECO:0000256|HAMAP-Rule:MF_00859};
GN Synonyms=rbcS {ECO:0000256|HAMAP-Rule:MF_00859};
GN ORFNames=RINTHM_12040 {ECO:0000313|EMBL:CCH65664.1};
OS Richelia intracellularis HM01.
OC Bacteria; Cyanobacteriota; Cyanophyceae; Nostocales; Nostocaceae; Richelia.
OX NCBI_TaxID=1165095 {ECO:0000313|EMBL:CCH65664.1, ECO:0000313|Proteomes:UP000054004};
RN [1] {ECO:0000313|EMBL:CCH65664.1, ECO:0000313|Proteomes:UP000054004}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=HM01 {ECO:0000313|EMBL:CCH65664.1,
RC ECO:0000313|Proteomes:UP000054004};
RA Hilton J.;
RL Submitted (APR-2012) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|Proteomes:UP000054004}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=HM01 {ECO:0000313|Proteomes:UP000054004};
RA Hilton J.A., Foster R.A., Tripp H.J., Carter B.J., Zehr J.P.,
RA Villareal T.A.;
RT "Diatom-associated endosymboitic cyanobacterium lacks core nitrogen
RT metabolism enzymes.";
RL Submitted (JAN-2016) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: RuBisCO catalyzes two reactions: the carboxylation of D-
CC ribulose 1,5-bisphosphate, the primary event in carbon dioxide
CC fixation, as well as the oxidative fragmentation of the pentose
CC substrate in the photorespiration process. Both reactions occur
CC simultaneously and in competition at the same active site. Although the
CC small subunit is not catalytic it is essential for maximal activity.
CC {ECO:0000256|HAMAP-Rule:MF_00859}.
CC -!- SUBUNIT: Heterohexadecamer of 8 large and 8 small subunits.
CC {ECO:0000256|HAMAP-Rule:MF_00859}.
CC -!- SUBCELLULAR LOCATION: Carboxysome {ECO:0000256|HAMAP-Rule:MF_00859}.
CC -!- MISCELLANEOUS: The basic functional RuBisCO is composed of a large
CC chain homodimer in a 'head-to-tail' conformation. In form I RuBisCO
CC this homodimer is arranged in a barrel-like tetramer with the small
CC subunits forming a tetrameric 'cap' on each end of the 'barrel'.
CC {ECO:0000256|HAMAP-Rule:MF_00859}.
CC -!- SIMILARITY: Belongs to the RuBisCO small chain family.
CC {ECO:0000256|HAMAP-Rule:MF_00859}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:CCH65664.1}.
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DR EMBL; CAIS01000666; CCH65664.1; -; Genomic_DNA.
DR RefSeq; WP_008229564.1; NZ_CAIS01000666.1.
DR AlphaFoldDB; M1WPC8; -.
DR Proteomes; UP000054004; Unassembled WGS sequence.
DR GO; GO:0031470; C:carboxysome; IEA:UniProtKB-SubCell.
DR GO; GO:0016984; F:ribulose-bisphosphate carboxylase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0009853; P:photorespiration; IEA:UniProtKB-KW.
DR GO; GO:0019253; P:reductive pentose-phosphate cycle; IEA:UniProtKB-UniRule.
DR CDD; cd03527; RuBisCO_small; 1.
DR Gene3D; 3.30.190.10; Ribulose bisphosphate carboxylase, small subunit; 1.
DR HAMAP; MF_00859; RuBisCO_S_bact; 1.
DR InterPro; IPR024681; RuBisCO_ssu.
DR InterPro; IPR000894; RuBisCO_ssu_dom.
DR InterPro; IPR036385; RuBisCO_ssu_sf.
DR PANTHER; PTHR31262; RIBULOSE BISPHOSPHATE CARBOXYLASE SMALL CHAIN 1, CHLOROPLASTIC; 1.
DR Pfam; PF00101; RuBisCO_small; 1.
DR SMART; SM00961; RuBisCO_small; 1.
DR SUPFAM; SSF55239; RuBisCO, small subunit; 1.
PE 3: Inferred from homology;
KW Bacterial microcompartment {ECO:0000256|HAMAP-Rule:MF_00859};
KW Calvin cycle {ECO:0000256|ARBA:ARBA00022567, ECO:0000256|HAMAP-
KW Rule:MF_00859};
KW Carbon dioxide fixation {ECO:0000256|ARBA:ARBA00023300, ECO:0000256|HAMAP-
KW Rule:MF_00859}; Carboxysome {ECO:0000256|HAMAP-Rule:MF_00859};
KW Lyase {ECO:0000313|EMBL:CCH65664.1};
KW Photorespiration {ECO:0000256|HAMAP-Rule:MF_00859};
KW Photosynthesis {ECO:0000256|HAMAP-Rule:MF_00859};
KW Reference proteome {ECO:0000313|Proteomes:UP000054004}.
FT DOMAIN 9..106
FT /note="Ribulose bisphosphate carboxylase small subunit"
FT /evidence="ECO:0000259|SMART:SM00961"
SQ SEQUENCE 109 AA; 13136 MW; 8071E863534D29A7 CRC64;
MQTLPKERRY ETLSYLPPLS DTQITKQIQY VLDQGYFPAI EFNEDSEPTQ YYWTMWKLPL
FNANSTQEVL REVQECRSQY PNCFIRIVGF DNIKQCQILS FIVHKPNRY
//
