RBS_SILLB
ID RBS_SILLB Reviewed; 177 AA.
AC P18960;
DT 01-NOV-1990, integrated into UniProtKB/Swiss-Prot.
DT 01-NOV-1990, sequence version 1.
DT 25-MAY-2022, entry version 97.
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 Flags: Precursor;
GN Name=RBCS {ECO:0000255|HAMAP-Rule:MF_00860};
OS Silene latifolia subsp. alba (White campion) (Lychnis alba).
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC Caryophyllales; Caryophyllaceae; Sileneae; Silene;
OC Silene subgen. Behenantha; Silene sect. Melandrium.
OX NCBI_TaxID=52853;
RN [1]
RP NUCLEOTIDE SEQUENCE [MRNA].
RX AGRICOLA=IND87019918; DOI=10.1007/BF00020327;
RA Smeekens S., van Oosten J., de Groot M., Weisbeek P.J.;
RT "Silene cDNA clones for a divergent chlorophyll-a/b-binding protein and a
RT small subunit of ribulose bisphosphate carboxylase.";
RL Plant Mol. Biol. 7:433-440(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; M16888; AAB39037.1; -; mRNA.
DR PIR; B30836; RKQHS.
DR AlphaFoldDB; P18960; -.
DR SMR; P18960; -.
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 2: Evidence at transcript level;
KW Calvin cycle; Carbon dioxide fixation; Chloroplast; Photorespiration;
KW Photosynthesis; Plastid; Transit peptide.
FT TRANSIT 1..55
FT /note="Chloroplast"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00860"
FT CHAIN 56..177
FT /note="Ribulose bisphosphate carboxylase small subunit,
FT chloroplastic"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00860"
FT /id="PRO_0000031549"
SQ SEQUENCE 177 AA; 19698 MW; 0D0DD565E6C1629E CRC64;
MASLMSNAAV VTASTAAQAN MVAPFSGLKS TSAFPVSRKS NVDITSLATN GGRVNCMQVW
PPRNLKKFET LSYLPTLSEE SLLKEINYLL IKGWVPCLEF EVGPAHVYRE NNKSPGYYDG
RYWTMWKLPM FGCTDASQVA AEVVECKNAY PDAHVRIIGF DNKRQVQCIS FIAYKPE
