ID   RBS3_WHEAT              Reviewed;         113 AA.
AC   P07398;
DT   01-APR-1988, integrated into UniProtKB/Swiss-Prot.
DT   01-APR-1988, sequence version 1.
DT   25-MAY-2022, entry version 108.
DE   RecName: Full=Ribulose bisphosphate carboxylase small subunit, chloroplastic 3 {ECO:0000255|HAMAP-Rule:MF_00860};
DE            Short=RuBisCO small subunit 3 {ECO:0000255|HAMAP-Rule:MF_00860};
DE   Flags: Fragment;
GN   Name=RBCS3 {ECO:0000255|HAMAP-Rule:MF_00860};
OS   Triticum aestivum (Wheat).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; Liliopsida; Poales; Poaceae; BOP clade;
OC   Pooideae; Triticodae; Triticeae; Triticinae; Triticum.
OX   NCBI_TaxID=4565;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RC   STRAIN=cv. Falcon; TISSUE=Seedling;
RX   PubMed=6324097; DOI=10.1093/nar/11.24.8719;
RA   Smith S.M., Bedbrook J.R., Speirs J.;
RT   "Characterisation of three cDNA clones encoding different mRNAs for the
RT   precursor to the small subunit of wheat ribulosebisphosphate carboxylase.";
RL   Nucleic Acids Res. 11:8719-8734(1983).
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; X00234; CAA25057.1; -; mRNA.
DR   PIR; A20899; RKWTS5.
DR   AlphaFoldDB; P07398; -.
DR   SMR; P07398; -.
DR   STRING; 4565.Traes_5AL_9C5A73F10.1; -.
DR   Proteomes; UP000019116; Unplaced.
DR   ExpressionAtlas; P07398; 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   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   PRINTS; PR00152; RUBISCOSMALL.
DR   SMART; SM00961; RuBisCO_small; 1.
DR   SUPFAM; SSF55239; SSF55239; 1.
PE   2: Evidence at transcript level;
KW   Calvin cycle; Carbon dioxide fixation; Chloroplast; Photorespiration;
KW   Photosynthesis; Plastid; Reference proteome.
FT   CHAIN           <1..113
FT                   /note="Ribulose bisphosphate carboxylase small subunit,
FT                   chloroplastic 3"
FT                   /id="PRO_0000198590"
FT   NON_TER         1
SQ   SEQUENCE   113 AA;  13055 MW;  A1A64509CC5B61AC CRC64;
     AYLPPLSTEA LLKQVDYLIR SKWVPCLEFS KVGFIFREHN ASPGYYDGRY WTMWKLPMFG
     CTDATQVINE VEEVKKEYPD AYVRIIGFDN MRQVQCVSFI AFKPPGCEES GKA