ID   RBS_HYDTE               Reviewed;         124 AA.
AC   Q51857;
DT   15-JUL-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   25-MAY-2022, entry version 74.
DE   RecName: Full=Ribulose bisphosphate carboxylase small subunit {ECO:0000255|HAMAP-Rule:MF_00859};
DE            Short=RuBisCO small subunit {ECO:0000255|HAMAP-Rule:MF_00859};
GN   Name=cbbS {ECO:0000255|HAMAP-Rule:MF_00859};
OS   Hydrogenophilus thermoluteolus (Pseudomonas hydrogenothermophila).
OC   Bacteria; Proteobacteria; Hydrogenophilalia; Hydrogenophilales;
OC   Hydrogenophilaceae; Hydrogenophilus.
OX   NCBI_TaxID=297;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=TH-1 / NBRC 14978;
RX   PubMed=7883189; DOI=10.1016/0378-1119(94)00808-6;
RA   Yokoyama K., Hayashi N.R., Arai H., Chung S.Y., Igarashi Y., Kodama T.;
RT   "Genes encoding RubisCO in Pseudomonas hydrogenothermophila are followed by
RT   a novel cbbQ gene similar to nirQ of the denitrification gene cluster from
RT   Pseudomonas species.";
RL   Gene 153:75-79(1995).
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:0000255|HAMAP-Rule:MF_00859}.
CC   -!- SUBUNIT: Heterohexadecamer of 8 large and 8 small subunits.
CC       {ECO:0000255|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:0000255|HAMAP-Rule:MF_00859}.
CC   -!- SIMILARITY: Belongs to the RuBisCO small chain family.
CC       {ECO:0000255|HAMAP-Rule:MF_00859}.
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DR   EMBL; D30764; BAA06438.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q51857; -.
DR   SMR; Q51857; -.
DR   GO; GO:0019253; P:reductive pentose-phosphate cycle; IEA:UniProtKB-KW.
DR   CDD; cd03527; RuBisCO_small; 1.
DR   Gene3D; 3.30.190.10; -; 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; PTHR31262; 1.
DR   Pfam; PF00101; RuBisCO_small; 1.
DR   SMART; SM00961; RuBisCO_small; 1.
DR   SUPFAM; SSF55239; SSF55239; 1.
PE   3: Inferred from homology;
KW   Calvin cycle; Carbon dioxide fixation.
FT   CHAIN           1..124
FT                   /note="Ribulose bisphosphate carboxylase small subunit"
FT                   /id="PRO_0000198618"
SQ   SEQUENCE   124 AA;  14656 MW;  313202B81A821D94 CRC64;
     MSETQDMIRD VQDYPSRLND PKSKRFETFS YLPQMSAEEI RKQIEYIVSK GWNPAIEHCE
     PENAILHYWY MWKLPMFGET DVDKIIAEIE ACKRSNPNHL IKLIGYDNIR QTQGTAMLVY
     RPAQ