RBS2_AMAHP
ID RBS2_AMAHP Reviewed; 184 AA.
AC Q9XGX5;
DT 23-JAN-2002, integrated into UniProtKB/Swiss-Prot.
DT 01-NOV-1999, sequence version 1.
DT 03-AUG-2022, entry version 82.
DE RecName: Full=Ribulose bisphosphate carboxylase small subunit, chloroplastic 2 {ECO:0000255|HAMAP-Rule:MF_00860};
DE Short=RuBisCO small subunit 2 {ECO:0000255|HAMAP-Rule:MF_00860};
DE Flags: Precursor;
GN Name=RBCS2 {ECO:0000255|HAMAP-Rule:MF_00860};
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=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; AF150666; AAD37439.1; -; mRNA.
DR AlphaFoldDB; Q9XGX5; -.
DR SMR; Q9XGX5; -.
DR PRIDE; Q9XGX5; -.
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..59
FT /note="Chloroplast"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00860"
FT CHAIN 60..184
FT /note="Ribulose bisphosphate carboxylase small subunit,
FT chloroplastic 2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00860"
FT /id="PRO_0000031461"
SQ SEQUENCE 184 AA; 20440 MW; 518B32BE00E01D17 CRC64;
MASSMMSNAA TAVAVAATSG GAQANMVAPF NGLKSIASFP VTRKSNDITS IASNGGRVQC
MQVWPPVGKK KFETLSYLPP LSDAQLLAQV QYLLNKGWIP CIEFELEHPF VYRENHRSPG
YQDGRYWTMW KLPMYGCTDP AQVLNEVEEA KKAYPTAFIR IIGFDNKRQV QCVSFIAYKP
ADSY
