ID I1I3X4_BRADI Unreviewed; 175 AA. AC I1I3X4; DT 13-JUN-2012, integrated into UniProtKB/TrEMBL. DT 13-JUN-2012, sequence version 1. DT 27-MAR-2024, entry version 66. DE RecName: Full=Ribulose bisphosphate carboxylase small subunit, chloroplastic {ECO:0000256|HAMAP-Rule:MF_00860}; DE Short=RuBisCO small subunit {ECO:0000256|HAMAP-Rule:MF_00860}; GN Name=100845819 {ECO:0000313|EnsemblPlants:KQJ96661}; GN Synonyms=RBCS {ECO:0000256|HAMAP-Rule:MF_00860}; GN ORFNames=BRADI_3g26391v3 {ECO:0000313|EMBL:KQJ96661.1}; OS Brachypodium distachyon (Purple false brome) (Trachynia distachya). OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta; OC Spermatophyta; Magnoliopsida; Liliopsida; Poales; Poaceae; BOP clade; OC Pooideae; Stipodae; Brachypodieae; Brachypodium. OX NCBI_TaxID=15368 {ECO:0000313|EMBL:KQJ96661.1}; RN [1] {ECO:0000313|EMBL:KQJ96661.1, ECO:0000313|EnsemblPlants:KQJ96661} RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=Bd21 {ECO:0000313|EMBL:KQJ96661.1, RC ECO:0000313|EnsemblPlants:KQJ96661}; RX PubMed=20148030; DOI=10.1038/nature08747; RG International Brachypodium Initiative; RT "Genome sequencing and analysis of the model grass Brachypodium RT distachyon."; RL Nature 463:763-768(2010). RN [2] {ECO:0000313|EMBL:KQJ96661.1} RP NUCLEOTIDE SEQUENCE. RC STRAIN=Bd21 {ECO:0000313|EMBL:KQJ96661.1}; RG The International Brachypodium Initiative; RA Lucas S., Harmon-Smith M., Lail K., Tice H., Grimwood J., Bruce D., RA Barry K., Shu S., Lindquist E., Wang M., Pitluck S., Vogel J.P., RA Garvin D.F., Mockler T.C., Schmutz J., Rokhsar D., Bevan M.W.; RT "WGS assembly of Brachypodium distachyon."; RL Submitted (JUN-2017) to the EMBL/GenBank/DDBJ databases. RN [3] {ECO:0000313|EnsemblPlants:KQJ96661} RP IDENTIFICATION. RC STRAIN=cv. Bd21 {ECO:0000313|EnsemblPlants:KQJ96661}; RG EnsemblPlants; RL Submitted (AUG-2018) to UniProtKB. 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_00860, CC ECO:0000256|RuleBase:RU003627}. CC -!- SUBUNIT: Heterohexadecamer of 8 large and 8 small subunits. CC {ECO:0000256|HAMAP-Rule:MF_00860, ECO:0000256|RuleBase:RU003627}. CC -!- SUBCELLULAR LOCATION: Plastid, chloroplast {ECO:0000256|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:0000256|HAMAP-Rule:MF_00860}. CC -!- SIMILARITY: Belongs to the RuBisCO small chain family. CC {ECO:0000256|HAMAP-Rule:MF_00860, ECO:0000256|RuleBase:RU003627}. 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; CM000882; KQJ96661.1; -; Genomic_DNA. DR RefSeq; XP_003573910.1; XM_003573862.2. DR AlphaFoldDB; I1I3X4; -. DR STRING; 15368.I1I3X4; -. DR EnsemblPlants; KQJ96661; KQJ96661; BRADI_3g26391v3. DR GeneID; 100845819; -. DR Gramene; KQJ96661; KQJ96661; BRADI_3g26391v3. DR KEGG; bdi:100845819; -. DR eggNOG; ENOG502QT0M; Eukaryota. DR HOGENOM; CLU_098114_1_0_1; -. DR InParanoid; I1I3X4; -. DR OMA; FELGNPF; -. DR OrthoDB; 5482775at2759; -. DR Proteomes; UP000008810; Chromosome 3. DR ExpressionAtlas; I1I3X4; baseline and differential. DR GO; GO:0009507; C:chloroplast; IEA:UniProtKB-SubCell. DR GO; GO:0016984; F:ribulose-bisphosphate carboxylase activity; IEA:UniProtKB-UniRule. DR GO; GO:0009853; P:photorespiration; 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; IPR024680; RuBisCO_ssu_N. DR InterPro; IPR036385; RuBisCO_ssu_sf. DR PANTHER; PTHR31262; RIBULOSE BISPHOSPHATE CARBOXYLASE SMALL CHAIN 1, CHLOROPLASTIC; 1. DR PANTHER; PTHR31262:SF10; RIBULOSE BISPHOSPHATE CARBOXYLASE SMALL SUBUNIT, CHLOROPLASTIC 2; 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; RuBisCO, small subunit; 1. PE 3: Inferred from homology; KW Calvin cycle {ECO:0000256|ARBA:ARBA00022567, ECO:0000256|HAMAP- KW Rule:MF_00860}; KW Carbon dioxide fixation {ECO:0000256|ARBA:ARBA00023300, ECO:0000256|HAMAP- KW Rule:MF_00860}; Chloroplast {ECO:0000256|HAMAP-Rule:MF_00860}; KW Photorespiration {ECO:0000256|ARBA:ARBA00023238, ECO:0000256|HAMAP- KW Rule:MF_00860}; KW Photosynthesis {ECO:0000256|ARBA:ARBA00022531, ECO:0000256|HAMAP- KW Rule:MF_00860}; KW Plastid {ECO:0000256|HAMAP-Rule:MF_00860, ECO:0000256|RuleBase:RU003627}; KW Reference proteome {ECO:0000313|Proteomes:UP000008810}; KW Transit peptide {ECO:0000256|ARBA:ARBA00022946}. FT DOMAIN 58..166 FT /note="Ribulose bisphosphate carboxylase small subunit" FT /evidence="ECO:0000259|SMART:SM00961" SQ SEQUENCE 175 AA; 19456 MW; 1E66E5A0551143E5 CRC64; MAPTVMSSAA TAVAPFQGLK STAGLPIGRR SASAGLGSVS NGGRIRCMQV WPIEGIKKFE TLSYLPPLTV ESLLKQIEYL IRSKWVPCLE FSKVGFVFRE HGNSPGYYDG RYWTMWKLPM FGCTDATQVL KELEEVKKEY PDAYVRIIGF DNTRQVQCIS FIAFKPPGCE ESGKA //