ID   RBS2_SOLTU              Reviewed;         181 AA.
AC   P26574;
DT   01-AUG-1992, integrated into UniProtKB/Swiss-Prot.
DT   01-AUG-1992, sequence version 1.
DT   03-AUG-2022, entry version 103.
DE   RecName: Full=Ribulose bisphosphate carboxylase small subunit, chloroplastic 2 {ECO:0000255|HAMAP-Rule:MF_00860};
DE            Short=RuBisCO small subunit 2 {ECO:0000255|HAMAP-Rule:MF_00860};
DE   AltName: Full=Ribulose bisphosphate carboxylase small chain 1, chloroplastic;
DE            Short=RuBisCO small subunit 1;
DE   Flags: Precursor;
GN   Name=RBCS2 {ECO:0000255|HAMAP-Rule:MF_00860}; Synonyms=RBCS-1;
OS   Solanum tuberosum (Potato).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; lamiids; Solanales; Solanaceae; Solanoideae; Solaneae; Solanum.
OX   NCBI_TaxID=4113;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=cv. HH1201/7;
RX   PubMed=3422467; DOI=10.1073/pnas.85.3.846;
RA   Wolter F.P., Fritz C.C., Willmitzer L., Schell J., Schreier P.H.;
RT   "rbcS genes in Solanum tuberosum: conservation of transit peptide and exon
RT   shuffling during evolution.";
RL   Proc. Natl. Acad. Sci. U.S.A. 85:846-850(1988).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=cv. AM 80.5793;
RA   Fritz C.C., Wolter F.P., Schenkemeyer V., Herget T., Schreier P.H.;
RL   Submitted (DEC-1992) 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:0000255|HAMAP-Rule:MF_00860}.
CC   -!- SUBUNIT: Heterohexadecamer of 8 large and 8 small subunits.
CC       {ECO:0000255|HAMAP-Rule:MF_00860}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast {ECO:0000255|HAMAP-
CC       Rule:MF_00860}.
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_00860}.
CC   -!- SIMILARITY: Belongs to the RuBisCO small chain family.
CC       {ECO:0000255|HAMAP-Rule:MF_00860}.
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; X69759; CAA49413.1; -; Genomic_DNA.
DR   PIR; B31083; RKPOS1.
DR   AlphaFoldDB; P26574; -.
DR   SMR; P26574; -.
DR   STRING; 4113.PGSC0003DMT400050381; -.
DR   PRIDE; P26574; -.
DR   eggNOG; ENOG502QT0M; Eukaryota.
DR   InParanoid; P26574; -.
DR   Proteomes; UP000011115; Unassembled WGS sequence.
DR   ExpressionAtlas; P26574; baseline and differential.
DR   GO; GO:0009507; C:chloroplast; IEA:UniProtKB-SubCell.
DR   GO; GO:0009853; P:photorespiration; IEA:UniProtKB-KW.
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; IPR024680; RuBisCO_ssu_N.
DR   InterPro; IPR036385; RuBisCO_ssu_sf.
DR   PANTHER; PTHR31262; PTHR31262; 1.
DR   Pfam; PF12338; RbcS; 1.
DR   Pfam; PF00101; RuBisCO_small; 1.
DR   PRINTS; PR00152; RUBISCOSMALL.
DR   SMART; SM00961; RuBisCO_small; 1.
DR   SUPFAM; SSF55239; SSF55239; 1.
PE   3: Inferred from homology;
KW   Calvin cycle; Carbon dioxide fixation; Chloroplast; Photorespiration;
KW   Photosynthesis; Plastid; Reference proteome; Transit peptide.
FT   TRANSIT         1..57
FT                   /note="Chloroplast"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00860"
FT   CHAIN           58..181
FT                   /note="Ribulose bisphosphate carboxylase small subunit,
FT                   chloroplastic 2"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00860"
FT                   /id="PRO_0000031551"
SQ   SEQUENCE   181 AA;  20557 MW;  1052870C1FA9342A CRC64;
     MASSVISSAA VATRTNVTQA GSMIAPFTGL KSAATFPVSR KQNLDITSIA SNGGRVRCMQ
     VWPPINMKKY ETLSYLPDLT DEQLLKEVEY LLKNGWVPCL EFETEHGFVY RENHKSPGYY
     DGRYWTMWKL PMFGCTDATQ VLAEVQECKK SYPQAWIRII GFDNVRQVQC ISFIAYKPEG
     Y