RBS1_AMAHP
ID RBS1_AMAHP Reviewed; 183 AA.
AC Q42516;
DT 15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT 01-NOV-1996, sequence version 1.
DT 25-MAY-2022, entry version 95.
DE RecName: Full=Ribulose bisphosphate carboxylase small subunit, chloroplastic 1 {ECO:0000255|HAMAP-Rule:MF_00860};
DE Short=RuBisCO small subunit 1 {ECO:0000255|HAMAP-Rule:MF_00860};
DE Flags: Precursor;
GN Name=RBCS1 {ECO:0000255|HAMAP-Rule:MF_00860}; Synonyms=RBCS;
OS Amaranthus hypochondriacus (Prince-of-Wales feather) (Amaranthus hybridus
OS var. hypochondriacus).
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC Caryophyllales; Amaranthaceae; Amaranthus.
OX NCBI_TaxID=28502;
RN [1]
RP NUCLEOTIDE SEQUENCE [MRNA].
RC STRAIN=Aztec race; TISSUE=Leaf;
RA Villegas-Sepulveda N., Jofre y Garfias A., Jimenez-Moraila B.,
RA Herrera-Estrella A., Simpson J.;
RL Submitted (MAY-1995) to the EMBL/GenBank/DDBJ databases.
RN [2]
RP NUCLEOTIDE SEQUENCE [MRNA].
RC STRAIN=R103;
RA Corey A.C., Dempsey D.A., Klessig D.F., Berry J.O.;
RT "Three RbcS cDNAs from the C4 dicotyledonous plant Amaranthus
RT hypochondriacus.";
RL (er) Plant Gene Register PGR99-101(1999).
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; X87171; CAA60636.1; -; mRNA.
DR EMBL; AF150665; AAD37438.1; -; mRNA.
DR PIR; S54818; S54818.
DR AlphaFoldDB; Q42516; -.
DR SMR; Q42516; -.
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..58
FT /note="Chloroplast"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00860"
FT CHAIN 59..183
FT /note="Ribulose bisphosphate carboxylase small subunit,
FT chloroplastic 1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00860"
FT /id="PRO_0000031460"
SQ SEQUENCE 183 AA; 20300 MW; 456743436B086B87 CRC64;
MASSMLSNAA MATTAATAGA QASMVAPFNG LKSFATFPIT KKSSNDFSSL PSNGGRVQCM
QVWPPVGKKK FETLSYLPPL SDAQLLAQVQ YLLNKGWIPC IEFELEHPFV YRENHRSPGY
QDGRYWTMWK LPMYGCTDPA QVLNEVEEAK KAYPSAFIRI IGFDNKRQVQ CVSFIAYKPA
GGL
