ID Q84U91_VOLCA Unreviewed; 185 AA.
AC Q84U91; D8UAG6;
DT 01-JUN-2003, integrated into UniProtKB/TrEMBL.
DT 01-JUN-2003, sequence version 1.
DT 27-MAR-2024, entry version 88.
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:0000313|EMBL:AAO46872.1};
GN Synonyms=RBCS {ECO:0000256|HAMAP-Rule:MF_00860};
OS Volvox carteri (Green alga).
OC Eukaryota; Viridiplantae; Chlorophyta; core chlorophytes; Chlorophyceae;
OC CS clade; Chlamydomonadales; Volvocaceae; Volvox.
OX NCBI_TaxID=3067 {ECO:0000313|EMBL:AAO46872.1};
RN [1] {ECO:0000313|EMBL:AAO46872.1}
RP NUCLEOTIDE SEQUENCE.
RA Jakobiak T., Mages W., Stark K., Schmitt R.D.;
RT "rbcS genes of Volvox carteri.";
RL Submitted (DEC-2002) 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; AY205158; AAO46872.1; -; Genomic_DNA.
DR AlphaFoldDB; Q84U91; -.
DR OMA; FLRRWEW; -.
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 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}.
FT DOMAIN 56..171
FT /note="Ribulose bisphosphate carboxylase small subunit"
FT /evidence="ECO:0000259|SMART:SM00961"
SQ SEQUENCE 185 AA; 20742 MW; A5CE42B99071D1BF CRC64;
MAAVIAKSSV ATAVARPARS GVRPVAVLKP SVRATPVATP TQANKMMVWT PVNNKMFETF
SYLPPLSDEQ IAAQVDYIVA NGWIPCLEFA EADKAYVSNE STVRFGPVSC LYYDNRYWTM
WKLPMFGCRD PMQVLREIVA CTKAFPDAYV RLVAFDNVKQ VQIMGFLVQR PKSARDWQPA
NKRSV
//
