RBS_NICPL
ID RBS_NICPL Reviewed; 180 AA.
AC P26573;
DT 01-AUG-1992, integrated into UniProtKB/Swiss-Prot.
DT 01-AUG-1992, sequence version 1.
DT 25-MAY-2022, entry version 88.
DE RecName: Full=Ribulose bisphosphate carboxylase small subunit, chloroplastic {ECO:0000255|HAMAP-Rule:MF_00860};
DE Short=RuBisCO small subunit {ECO:0000255|HAMAP-Rule:MF_00860};
DE AltName: Full=Ribulose bisphosphate carboxylase small chain 8B, chloroplastic;
DE Short=RuBisCO small subunit 8B;
DE Flags: Precursor;
GN Name=RBCS {ECO:0000255|HAMAP-Rule:MF_00860}; Synonyms=RBCS-8B;
OS Nicotiana plumbaginifolia (Leadwort-leaved tobacco) (Tex-Mex tobacco).
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC asterids; lamiids; Solanales; Solanaceae; Nicotianoideae; Nicotianeae;
OC Nicotiana.
OX NCBI_TaxID=4092;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA Poulsen C., Fluhr R., Kauffman J.M., Boutry M., Chua N.H.;
RT "Characterization of an rbcS gene from Nicotiana plumbaginifolia and
RT expression of an rbcS-CAT chimeric gene in homologous and heterologous
RT nuclear background.";
RL Mol. Gen. Genet. 205:193-200(1986).
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}.
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DR EMBL; M36685; AAA34110.1; -; Genomic_DNA.
DR EMBL; X13711; CAA31994.1; -; Genomic_DNA.
DR PIR; S08318; RKNTSV.
DR AlphaFoldDB; P26573; -.
DR SMR; P26573; -.
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; Transit peptide.
FT TRANSIT 1..56
FT /note="Chloroplast"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00860"
FT CHAIN 57..180
FT /note="Ribulose bisphosphate carboxylase small subunit,
FT chloroplastic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00860"
FT /id="PRO_0000031534"
SQ SEQUENCE 180 AA; 20358 MW; 80E780E5FD2EE438 CRC64;
MASSVLSSAA VATRSNVAQA NMVAPFTGLK SAASFPVSRK QNLDITSIAS NGGRVQCMQV
WPPINKKKYE TLSYLPDLSQ EQLLSEIEYL LKSGWVPCLE FETERGFVYR EHHHSPGYYD
GRYWTMWKLP MFGCTDATQV LAEVEEAKKA YPQAWVRIIG FDNVRQVQCI SFIAYKPEGY
