ID   RBS7_ACEPE              Reviewed;         183 AA.
AC   Q38693;
DT   15-DEC-1998, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   25-MAY-2022, entry version 86.
DE   RecName: Full=Ribulose bisphosphate carboxylase small subunit, chloroplastic 7 {ECO:0000255|HAMAP-Rule:MF_00860};
DE            Short=RuBisCO small subunit 7 {ECO:0000255|HAMAP-Rule:MF_00860};
DE   AltName: Full=rbcS1;
DE   Flags: Precursor;
GN   Name=RBCS7 {ECO:0000255|HAMAP-Rule:MF_00860}; Synonyms=RBCS-7;
OS   Acetabularia peniculus (Green alga) (Polyphysa peniculus).
OC   Eukaryota; Viridiplantae; Chlorophyta; Ulvophyceae; TCBD clade;
OC   Dasycladales; Polyphysaceae; Acetabularia.
OX   NCBI_TaxID=35862;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Frank S., Menzel D.;
RT   "Characterization of two genes for isoforms of the small subunit of
RT   ribulose-1,5-bisphosphate carboxylase oxygenase (rbcS) from the marine
RT   unicellular green alga Acetabularia cliftonii (Dasycladales).";
RL   Submitted (DEC-1993) 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: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; Z28636; CAA82265.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q38693; -.
DR   SMR; Q38693; -.
DR   PRIDE; Q38693; -.
DR   GO; GO:0009507; C:chloroplast; IEA:UniProtKB-SubCell.
DR   GO; GO:0016829; F:lyase activity; IEA:UniProtKB-KW.
DR   GO; GO:0004497; F:monooxygenase activity; IEA:UniProtKB-KW.
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; IPR036385; RuBisCO_ssu_sf.
DR   PANTHER; PTHR31262; PTHR31262; 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; Lyase; Monooxygenase;
KW   Oxidoreductase; Photorespiration; Photosynthesis; Plastid; Transit peptide.
FT   TRANSIT         1..43
FT                   /note="Chloroplast"
FT                   /evidence="ECO:0000250"
FT   CHAIN           44..183
FT                   /note="Ribulose bisphosphate carboxylase small subunit,
FT                   chloroplastic 7"
FT                   /id="PRO_0000031453"
SQ   SEQUENCE   183 AA;  20553 MW;  59C8075B96500696 CRC64;
     MAAAMMNKTV VVGKESVKGG VAPKVAMSRG GFLNSGIMKK DRDMMVWQPF NNKMFETFSY
     LPPLTDEQIS KQVDYILANS WTPCLEFAAS DQAYAGNENC IRMGPVASTY QDNRYWTMWK
     LPMFGCTDGS QVLSDMQACT KAFPDAYIRL VCFDANRQVQ ICGFLVHRPP SATDYRLPAD
     RQV