ID   D7A344_STAND            Unreviewed;       139 AA.
AC   D7A344;
DT   10-AUG-2010, integrated into UniProtKB/TrEMBL.
DT   10-AUG-2010, sequence version 1.
DT   27-MAR-2024, entry version 53.
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   OrderedLocusNames=Snov_0429 {ECO:0000313|EMBL:ADH87762.1};
OS   Starkeya novella (strain ATCC 8093 / DSM 506 / JCM 20403 / CCM 1077 / IAM
OS   12100 / NBRC 12443 / NCIMB 10456).
OC   Bacteria; Pseudomonadota; Alphaproteobacteria; Hyphomicrobiales;
OC   Xanthobacteraceae; Ancylobacter.
OX   NCBI_TaxID=639283 {ECO:0000313|EMBL:ADH87762.1, ECO:0000313|Proteomes:UP000006633};
RN   [1] {ECO:0000313|EMBL:ADH87762.1, ECO:0000313|Proteomes:UP000006633}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 8093 / DSM 506 / JCM 20403 / CCM 1077 / IAM 12100 / NBRC
RC   12443 / NCIMB 10456 {ECO:0000313|Proteomes:UP000006633};
RX   PubMed=23450099; DOI=10.4056/sigs.3006378;
RA   Kappler U., Davenport K., Beatson S., Lucas S., Lapidus A., Copeland A.,
RA   Berry K.W., Glavina Del Rio T., Hammon N., Dalin E., Tice H., Pitluck S.,
RA   Richardson P., Bruce D., Goodwin L.A., Han C., Tapia R., Detter J.C.,
RA   Chang Y.J., Jeffries C.D., Land M., Hauser L., Kyrpides N.C., Goker M.,
RA   Ivanova N., Klenk H.P., Woyke T.;
RT   "Complete genome sequence of the facultatively chemolithoautotrophic and
RT   methylotrophic alpha Proteobacterium Starkeya novella type strain (ATCC
RT   8093(T)).";
RL   Stand. Genomic Sci. 7:44-58(2012).
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. Both reactions occur simultaneously and in competition at
CC       the same active site. Although the small subunit is not catalytic it is
CC       essential for maximal activity. {ECO:0000256|HAMAP-Rule:MF_00859}.
CC   -!- SUBUNIT: Heterohexadecamer of 8 large and 8 small subunits.
CC       {ECO:0000256|ARBA:ARBA00038826, 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; CP002026; ADH87762.1; -; Genomic_DNA.
DR   RefSeq; WP_013165267.1; NC_014217.1.
DR   AlphaFoldDB; D7A344; -.
DR   STRING; 639283.Snov_0429; -.
DR   KEGG; sno:Snov_0429; -.
DR   eggNOG; COG4451; Bacteria.
DR   HOGENOM; CLU_098114_2_0_5; -.
DR   OrthoDB; 9788955at2; -.
DR   Proteomes; UP000006633; Chromosome.
DR   GO; GO:0016984; F:ribulose-bisphosphate carboxylase activity; IEA:UniProtKB-UniRule.
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:SF23; RIBULOSE BISPHOSPHATE CARBOXYLASE SMALL SUBUNIT; 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   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}; Lyase {ECO:0000313|EMBL:ADH87762.1}.
FT   DOMAIN          4..104
FT                   /note="Ribulose bisphosphate carboxylase small subunit"
FT                   /evidence="ECO:0000259|SMART:SM00961"
SQ   SEQUENCE   139 AA;  16176 MW;  2EA289DCF26CDB17 CRC64;
     MRITQGAFSF LPDLTDEQIT KQVQYCIDKG WAVNIEFTDD PHPRNTYWEL WGQPMFDVRD
     AAGVMFELNA CRKAYAGRHY IRVSAFDSTH TWESLRLSFI TDRPAEEPGF ALERQEVDGR
     SIRYTTRAYA ANRPEGARY
//