ID   Q1QFR9_NITHX            Unreviewed;       108 AA.
AC   Q1QFR9;
DT   16-MAY-2006, integrated into UniProtKB/TrEMBL.
DT   16-MAY-2006, sequence version 1.
DT   27-MAR-2024, entry version 86.
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=Nham_4333 {ECO:0000313|EMBL:ABE64928.1};
OS   Nitrobacter hamburgensis (strain DSM 10229 / NCIMB 13809 / X14).
OG   Plasmid pNITHX1 {ECO:0000313|Proteomes:UP000001953}.
OC   Bacteria; Pseudomonadota; Alphaproteobacteria; Hyphomicrobiales;
OC   Nitrobacteraceae; Nitrobacter.
OX   NCBI_TaxID=323097 {ECO:0000313|EMBL:ABE64928.1, ECO:0000313|Proteomes:UP000001953};
RN   [1] {ECO:0000313|Proteomes:UP000001953}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 10229 / NCIMB 13809 / X14
RC   {ECO:0000313|Proteomes:UP000001953};
RC   PLASMID=Plasmid pNITHX1 {ECO:0000313|Proteomes:UP000001953};
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C.,
RA   Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S.,
RA   Chain P., Malfatti S., Shin M., Vergez L., Schmutz J., Larimer F., Land M.,
RA   Hauser L., Kyrpides N., Ivanova N., Ward B., Arp D., Klotz M., Stein L.,
RA   O'Mullan G., Starkenburg S., Sayavedra L., Poret-Peterson A.T.,
RA   Gentry M.E., Bruce D., Richardson P.;
RT   "Complete sequence of plasmid 1 of Nitrobacter hamburgensis X14.";
RL   Submitted (MAR-2006) 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}.
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DR   EMBL; CP000320; ABE64928.1; -; Genomic_DNA.
DR   RefSeq; WP_011504814.1; NC_007959.1.
DR   AlphaFoldDB; Q1QFR9; -.
DR   KEGG; nha:Nham_4333; -.
DR   HOGENOM; CLU_098114_2_0_5; -.
DR   OrthoDB; 9788955at2; -.
DR   Proteomes; UP000001953; Plasmid pNITHX1.
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}; Lyase {ECO:0000313|EMBL:ABE64928.1};
KW   Plasmid {ECO:0000313|EMBL:ABE64928.1};
KW   Reference proteome {ECO:0000313|Proteomes:UP000001953}.
FT   DOMAIN          11..108
FT                   /note="Ribulose bisphosphate carboxylase small subunit"
FT                   /evidence="ECO:0000259|SMART:SM00961"
SQ   SEQUENCE   108 AA;  12618 MW;  6207A447D37627A5 CRC64;
     MAVQAYRSMK KYETFSYLPP MTPDQVRRQI AYAIAQGWNP AVEHTEKGTS AKTSYWYMWK
     LPLFGEQSVD AVMAEIEACH REFPDQLVRF LAYDNYSQSQ GMAFVVYR
//