ID   F8GEW4_NITSI            Unreviewed;       118 AA.
AC   F8GEW4;
DT   21-SEP-2011, integrated into UniProtKB/TrEMBL.
DT   21-SEP-2011, sequence version 1.
DT   27-MAR-2024, entry version 45.
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=Nit79A3_1254 {ECO:0000313|EMBL:AEJ01096.1};
OS   Nitrosomonas sp. (strain Is79A3).
OC   Bacteria; Pseudomonadota; Betaproteobacteria; Nitrosomonadales;
OC   Nitrosomonadaceae; Nitrosomonas.
OX   NCBI_TaxID=261292 {ECO:0000313|EMBL:AEJ01096.1};
RN   [1] {ECO:0000313|EMBL:AEJ01096.1}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Is79A3 {ECO:0000313|EMBL:AEJ01096.1};
RG   US DOE Joint Genome Institute;
RA   Lucas S., Han J., Lapidus A., Cheng J.-F., Goodwin L., Pitluck S.,
RA   Peters L., Ovchinnikova G., Lu M., Detter J.C., Han C., Tapia R., Land M.,
RA   Hauser L., Kyrpides N., Ivanova N., Pagani I., Bollmann A., Norton J.,
RA   Suwa Y., Klotz M., Stein L., Laanbroek H., Arp D., Woyke T.;
RT   "Complete sequence of Nitrosomonas sp. Is79A3.";
RL   Submitted (JUN-2011) 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. 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|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   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; CP002876; AEJ01096.1; -; Genomic_DNA.
DR   AlphaFoldDB; F8GEW4; -.
DR   STRING; 261292.Nit79A3_1254; -.
DR   KEGG; nii:Nit79A3_1254; -.
DR   eggNOG; COG4451; Bacteria.
DR   HOGENOM; CLU_098114_2_0_4; -.
DR   OrthoDB; 9788955at2; -.
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   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}.
FT   DOMAIN          18..115
FT                   /note="Ribulose bisphosphate carboxylase small subunit"
FT                   /evidence="ECO:0000259|SMART:SM00961"
SQ   SEQUENCE   118 AA;  13662 MW;  E4697D6D0D6A41FA CRC64;
     MSEVIDYKSR VSDPASRKFE TFSYLPAMSD KDIKKQVQYL ISKGWNPAIE HTEPEYVMDS
     YWYMWKLPMF GETDVDRVLA EAAACHKANP NNHVRLIGYN NFNQSQGTAM VIYRGKTV
//