ID K9SU25_9SYNE Unreviewed; 111 AA.
AC K9SU25;
DT 06-MAR-2013, integrated into UniProtKB/TrEMBL.
DT 06-MAR-2013, sequence version 1.
DT 24-JAN-2024, entry version 41.
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=Syn7502_01667 {ECO:0000313|EMBL:AFY73723.1};
OS Synechococcus sp. PCC 7502.
OC Bacteria; Cyanobacteriota; Cyanophyceae; Synechococcales; Synechococcaceae;
OC Synechococcus.
OX NCBI_TaxID=1173263 {ECO:0000313|EMBL:AFY73723.1, ECO:0000313|Proteomes:UP000010385};
RN [1] {ECO:0000313|EMBL:AFY73723.1, ECO:0000313|Proteomes:UP000010385}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PCC 7502 {ECO:0000313|EMBL:AFY73723.1,
RC ECO:0000313|Proteomes:UP000010385};
RG US DOE Joint Genome Institute;
RA Gugger M., Coursin T., Rippka R., Tandeau De Marsac N., Huntemann M.,
RA Wei C.-L., Han J., Detter J.C., Han C., Tapia R., Davenport K.,
RA Daligault H., Erkkila T., Gu W., Munk A.C.C., Teshima H., Xu Y., Chain P.,
RA Chen A., Krypides N., Mavromatis K., Markowitz V., Szeto E., Ivanova N.,
RA Mikhailova N., Ovchinnikova G., Pagani I., Pati A., Goodwin L., Peters L.,
RA Pitluck S., Woyke T., Kerfeld C.;
RT "Finished chromosome of genome of Synechococcus sp. PCC 7502.";
RL Submitted (MAY-2012) 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}.
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DR EMBL; CP003594; AFY73723.1; -; Genomic_DNA.
DR RefSeq; WP_015168380.1; NC_019702.1.
DR AlphaFoldDB; K9SU25; -.
DR STRING; 1173263.Syn7502_01667; -.
DR KEGG; synp:Syn7502_01667; -.
DR PATRIC; fig|1173263.3.peg.1729; -.
DR eggNOG; COG4451; Bacteria.
DR HOGENOM; CLU_098114_2_0_3; -.
DR OrthoDB; 9788955at2; -.
DR Proteomes; UP000010385; Chromosome.
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 PANTHER; PTHR31262:SF0; RIBULOSE BISPHOSPHATE CARBOXYLASE SMALL SUBUNIT, CHLOROPLASTIC 1; 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|ARBA:ARBA00023669,
KW 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};
KW Carboxysome {ECO:0000256|ARBA:ARBA00023669, ECO:0000256|HAMAP-
KW Rule:MF_00859}; Photorespiration {ECO:0000256|HAMAP-Rule:MF_00859};
KW Photosynthesis {ECO:0000256|HAMAP-Rule:MF_00859};
KW Reference proteome {ECO:0000313|Proteomes:UP000010385}.
FT DOMAIN 9..106
FT /note="Ribulose bisphosphate carboxylase small subunit"
FT /evidence="ECO:0000259|SMART:SM00961"
SQ SEQUENCE 111 AA; 12905 MW; F420DC5B3DAAD23E CRC64;
MKTLPKERRY ETLSYLPPLT DAKIAKQIQY ILSQGFIPAI EFNETSEPTV YFWTLWKLPL
FGAKSTQEVL SEIQACRSEY SNSFIRVIGF DNVKQCQTMS FIVHKPTSSR F
//