AC   MF_00859;
DC   Protein; auto
c?   <OC:Bacteria> or <OG:Plastid>
TR   HAMAP; MF_00859; -; 1; level=0
XX
Names: RuBisCO_S_bact
XX
ID   RBS
DE   RecName: Full=Ribulose bisphosphate carboxylase small subunit;
DE            Short=RuBisCO small subunit;
case <OC:Cyanobacteriota>
GN   Name=cbbS; Synonyms=rbcS;
else case <OC:Eukaryota>
GN   Name=rbcS;
else
GN   Name=cbbS;
end case
XX
case <OG:Chloroplast> or <OC:Cyanobacteriota>
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 in the photorespiration process. Both reactions occur
CC       simultaneously and in competition at the same active site. Although the
CC       small subunit is not catalytic it is essential for maximal activity.
else
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.
end case
CC   -!- SUBUNIT: Heterohexadecamer of 8 large and 8 small subunits.
case <OC:Cyanobacteriota>
CC   -!- SUBCELLULAR LOCATION: Carboxysome.
end case
case <OC:Eukaryota>
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast.
end case
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   -!- SIMILARITY: Belongs to the RuBisCO small chain family.
XX
DR   Pfam; PF00101; RuBisCO_small; 1; trigger=no
XX
KW   Calvin cycle
KW   Carbon dioxide fixation
case <OC:Cyanobacteriota>
KW   Carboxysome
end case
case <OC:Eukaryota>
KW   Chloroplast
end case
case <OG:Chloroplast> or <OC:Cyanobacteriota> or <Property:PHOTOSYN>
KW   Photorespiration
KW   Photosynthesis
end case
XX
GO   GO:0015977; P:carbon fixation
GO   GO:0016984; F:ribulose-bisphosphate carboxylase activity
GO   GO:0019253; P:reductive pentose-phosphate cycle
case <OC:Cyanobacteriota>
GO   GO:0031470; C:carboxysome
end case
case <OC:Cyanobacteriota> or <OG:Chloroplast> or <Property:PHOTOSYN>
GO   GO:0009507; C:chloroplast
end case
XX
FT   None
XX
Size: 85-200;
Related: None;
Template: Q31NB2; P04716; P45686; P27998; P23756;
Scope:
 Bacteria; Cyanobacteriota
 Bacteria; Pseudomonadota
 Bacteria; Actinomycetota
 Bacteria; Verrucomicrobiota
 Plastid
Fusion:
 Nter: None
 Cter: None
Duplicate: None
Plasmid: None
Comments: None
XX
# Revision 1.5 2023/02/17
//