ID A0A1Y0RHH1_9CYAN Unreviewed; 109 AA.
AC A0A1Y0RHH1;
DT 30-AUG-2017, integrated into UniProtKB/TrEMBL.
DT 30-AUG-2017, sequence version 1.
DT 24-JAN-2024, entry version 18.
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=BZZ01_13185 {ECO:0000313|EMBL:ARV59453.1};
OS Nostocales cyanobacterium HT-58-2.
OC Bacteria; Cyanobacteriota; Cyanophyceae; Nostocales.
OX NCBI_TaxID=1940762 {ECO:0000313|EMBL:ARV59453.1, ECO:0000313|Proteomes:UP000196302};
RN [1] {ECO:0000313|EMBL:ARV59453.1, ECO:0000313|Proteomes:UP000196302}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=HT-58-2 {ECO:0000313|EMBL:ARV59453.1,
RC ECO:0000313|Proteomes:UP000196302};
RA Hughes R.-A., Zhang Y., Zhang R., Williams P.G., Lindsey J.S., Miller E.S.;
RT "Genome sequences and microbial community composition of HT-58-2, a
RT tolyporphin-producing cyanobacterium-microbial holobiont.";
RL Submitted (FEB-2017) 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; CP019636; ARV59453.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1Y0RHH1; -.
DR KEGG; ncn:BZZ01_13185; -.
DR OrthoDB; 9788955at2; -.
DR Proteomes; UP000196302; 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 Pfam; PF00101; RuBisCO_small; 1.
DR PRINTS; PR00152; RUBISCOSMALL.
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 Photorespiration {ECO:0000256|HAMAP-Rule:MF_00859};
KW Photosynthesis {ECO:0000256|HAMAP-Rule:MF_00859};
KW Reference proteome {ECO:0000313|Proteomes:UP000196302}.
FT DOMAIN 9..106
FT /note="Ribulose bisphosphate carboxylase small subunit"
FT /evidence="ECO:0000259|SMART:SM00961"
SQ SEQUENCE 109 AA; 12889 MW; A9CA714DAD91E8D4 CRC64;
MQTLPKERRY ETLSYLPPLS DAQIAKQIQY ILNQGYIPAI EFNEDSEPTV YYWTLWKLPL
FSARSTQEVL SEVQACRSQY PNHFIRVVGF DNIKQCQILS FIVHKPSRY
//
