ID   A9PI67_POPTR            Unreviewed;       170 AA.
AC   A9PI67;
DT   05-FEB-2008, integrated into UniProtKB/TrEMBL.
DT   05-FEB-2008, sequence version 1.
DT   27-MAR-2024, entry version 95.
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=RBCS {ECO:0000256|HAMAP-Rule:MF_00860};
GN   ORFNames=POPTR_018G091401 {ECO:0000313|EMBL:RQP02913.1};
OS   Populus trichocarpa (Western balsam poplar) (Populus balsamifera subsp.
OS   trichocarpa).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; fabids; Malpighiales; Salicaceae; Saliceae; Populus.
OX   NCBI_TaxID=3694 {ECO:0000313|EMBL:ABK96070.1};
RN   [1] {ECO:0000313|EMBL:RQP02913.1, ECO:0000313|Proteomes:UP000006729}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=cv. Nisqually {ECO:0000313|Proteomes:UP000006729}, and
RC   Nisqually-1 {ECO:0000313|EMBL:RQP02913.1};
RX   PubMed=16973872; DOI=10.1126/science.1128691;
RA   Tuskan G.A., Difazio S., Jansson S., Bohlmann J., Grigoriev I.,
RA   Hellsten U., Putnam N., Ralph S., Rombauts S., Salamov A., Schein J.,
RA   Sterck L., Aerts A., Bhalerao R.R., Bhalerao R.P., Blaudez D., Boerjan W.,
RA   Brun A., Brunner A., Busov V., Campbell M., Carlson J., Chalot M.,
RA   Chapman J., Chen G.L., Cooper D., Coutinho P.M., Couturier J., Covert S.,
RA   Cronk Q., Cunningham R., Davis J., Degroeve S., Dejardin A.,
RA   Depamphilis C., Detter J., Dirks B., Dubchak I., Duplessis S., Ehlting J.,
RA   Ellis B., Gendler K., Goodstein D., Gribskov M., Grimwood J., Groover A.,
RA   Gunter L., Hamberger B., Heinze B., Helariutta Y., Henrissat B.,
RA   Holligan D., Holt R., Huang W., Islam-Faridi N., Jones S.,
RA   Jones-Rhoades M., Jorgensen R., Joshi C., Kangasjarvi J., Karlsson J.,
RA   Kelleher C., Kirkpatrick R., Kirst M., Kohler A., Kalluri U., Larimer F.,
RA   Leebens-Mack J., Leple J.C., Locascio P., Lou Y., Lucas S., Martin F.,
RA   Montanini B., Napoli C., Nelson D.R., Nelson C., Nieminen K., Nilsson O.,
RA   Pereda V., Peter G., Philippe R., Pilate G., Poliakov A., Razumovskaya J.,
RA   Richardson P., Rinaldi C., Ritland K., Rouze P., Ryaboy D., Schmutz J.,
RA   Schrader J., Segerman B., Shin H., Siddiqui A., Sterky F., Terry A.,
RA   Tsai C.J., Uberbacher E., Unneberg P., Vahala J., Wall K., Wessler S.,
RA   Yang G., Yin T., Douglas C., Marra M., Sandberg G., Van de Peer Y.,
RA   Rokhsar D.;
RT   "The genome of black cottonwood, Populus trichocarpa (Torr. & Gray).";
RL   Science 313:1596-1604(2006).
RN   [2] {ECO:0000313|EMBL:ABK96070.1}
RP   NUCLEOTIDE SEQUENCE.
RC   TISSUE=Young and mature leaves {ECO:0000313|EMBL:ABK96070.1};
RX   PubMed=18230180; DOI=10.1186/1471-2164-9-57;
RA   Ralph S.G., Chun H.J., Cooper D., Kirkpatrick R., Kolosova N., Gunter L.,
RA   Tuskan G.A., Douglas C.J., Holt R.A., Jones S.J., Marra M.A., Bohlmann J.;
RT   "Analysis of 4,664 high-quality sequence-finished poplar full-length cDNA
RT   clones and their utility for the discovery of genes responding to insect
RT   feeding.";
RL   BMC Genomics 9:57-57(2008).
RN   [3] {ECO:0000313|EMBL:RQP02913.1}
RP   NUCLEOTIDE SEQUENCE.
RC   STRAIN=Nisqually-1 {ECO:0000313|EMBL:RQP02913.1};
RA   Tuskan G., Difazio S., Jansson S., Bohlmann J., Grigoriev I., Hellsten U.,
RA   Putnam N., Ralph S., Rombauts S., Salamov A., Schein J., Sterck L.,
RA   Aerts A., Bhalerao R., Bhalerao R., Blaudez D., Boerjan W., Brun A.,
RA   Brunner A., Busov V., Campbell M., Carlson J., Chalot M., Chapman J.,
RA   Chen G., Cooper D., Coutinho P., Couturier J., Covert S., Cronk Q.,
RA   Cunningham R., Davis J., Degroeve S., Dejardin A., Depamphilis C.,
RA   Detter J., Dirks B., Dubchak I., Duplessis S., Ehlting J., Ellis B.,
RA   Gendler K., Goodstein D., Gribskov M., Grimwood J., Groover A., Gunter L.,
RA   Hamberger B., Heinze B., Helariutta Y., Henrissat B., Holligan D., Holt R.,
RA   Huang W., Islam-Faridi N., Jones S., Jones-Rhoades M., Jorgensen R.,
RA   Joshi C., Kangasjarvi J., Karlsson J., Kelleher C., Kirkpatrick R.,
RA   Kirst M., Kohler A., Kalluri U., Larimer F., Leebens-Mack J., Leple J.,
RA   Locascio P., Lou Y., Lucas S., Martin F., Montanini B., Napoli C.,
RA   Nelson D., Nelson C., Nieminen K., Nilsson O., Pereda V., Peter G.,
RA   Philippe R., Pilate G., Poliakov A., Razumovskaya J., Richardson P.,
RA   Rinaldi C., Ritland K., Rouze P., Ryaboy D., Schmutz J., Schrader J.,
RA   Segerman B., Shin H., Siddiqui A., Sterky F., Terry A., Tsai C.,
RA   Uberbacher E., Unneberg P., Vahala J., Wall K., Wessler S., Yang G.,
RA   Yin T., Douglas C., Marra M., Sandberg G., Van De Peer Y., Rokhsar D.;
RT   "WGS assembly of Populus trichocarpa.";
RL   Submitted (JUL-2017) 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_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}.
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DR   EMBL; EF148086; ABK96070.1; -; mRNA.
DR   EMBL; CM009307; RQP02913.1; -; Genomic_DNA.
DR   AlphaFoldDB; A9PI67; -.
DR   STRING; 3694.A9PI67; -.
DR   EnsemblPlants; Potri.018G091401.1.v4.1; Potri.018G091401.1.v4.1; Potri.018G091401.v4.1.
DR   Gramene; Potri.018G091401.1.v4.1; Potri.018G091401.1.v4.1; Potri.018G091401.v4.1.
DR   InParanoid; A9PI67; -.
DR   OrthoDB; 5482775at2759; -.
DR   Proteomes; UP000006729; Chromosome 18.
DR   ExpressionAtlas; A9PI67; 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; IPR036385; RuBisCO_ssu_sf.
DR   PANTHER; PTHR31262; RIBULOSE BISPHOSPHATE CARBOXYLASE SMALL CHAIN 1, CHLOROPLASTIC; 1.
DR   PANTHER; PTHR31262:SF28; RIBULOSE BISPHOSPHATE CARBOXYLASE SMALL SUBUNIT, CHLOROPLASTIC 1; 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   2: Evidence at transcript level;
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:UP000006729}.
FT   DOMAIN          60..168
FT                   /note="Ribulose bisphosphate carboxylase small subunit"
FT                   /evidence="ECO:0000259|SMART:SM00961"
SQ   SEQUENCE   170 AA;  19202 MW;  2105A61A4803E122 CRC64;
     MSAGIFAASA VAAPGYHGLR ALPTKQPFAT KNSVARSSRT VSNGSKTFCM KTWNPINNKK
     FEALSYLPPL SEDSIAKEID YMMKKGWIPC LEFDEVGSVR REHSRMPGYY DGRYWTLWKL
     PMFGCTDSSQ VLEEIHECKK AYPDAYIRCL AFDNKHQGQC MAFVIQKPGN
//