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HAMAP rule MF_01133

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General rule information [?]

Accession MF_01133
Dates 25-SEP-2003 (Created)
1-JUN-2023 (Last updated, Version 35)
Name RuBisCO_L_type3
Templates O93627 (RBL_THEKO); Q58632 (RBL_METJA); O28635 (RBL_ARCFU); Q8THG2 (RBL_METAC): [Recover all]

Propagated annotation [?]

Identifier, protein and gene names [?]

Protein name
RecName: Full=Ribulose bisphosphate carboxylase;
Gene name

Comments [?]

Function Catalyzes the addition of molecular CO(2) and H(2)O to ribulose 1,5-bisphosphate (RuBP), generating two molecules of 3-phosphoglycerate (3-PGA). Functions in an archaeal AMP degradation pathway, together with AMP phosphorylase and R15P isomerase.
Catalytic activity RHEA:23124: 2 (2R)-3-phosphoglycerate + 2 H(+) = CO2 + D-ribulose 1,5-bisphosphate + H2O
RHEA:36631: D-ribulose 1,5-bisphosphate + O2 = (2R)-3-phosphoglycerate + 2-phosphoglycolate + 2 H(+)
case <FTGroup:1>
Cofactor Mg(2+)
Note: Binds 1 Mg(2+) ion per subunit.
end case
Subunit Homodimer or homodecamer. In contrast to form I RuBisCO, the form III RuBisCO is composed solely of large subunits.
Miscellaneous Because the Archaea possessing a type III RuBisCO are all anaerobic, it is most likely that only the carboxylase activity of RuBisCO, and not the competitive oxygenase activity (by which RuBP reacts with O(2) to form one molecule of 3-phosphoglycerate and one molecule of 2-phosphoglycolate), is biologically relevant in these strains.
Similarity Belongs to the RuBisCO large chain family. Type III subfamily.

Keywords [?]

case <FTGroup:1>
end case

Gene Ontology [?]

case <FTGroup:1>
GO:0000287; Molecular function: magnesium ion binding.
end case
GO:0016984; Molecular function: ribulose-bisphosphate carboxylase activity.
GO:0006196; Biological process: AMP catabolic process.

Cross-references [?]

Pfam PF00016; RuBisCO_large; 1;
PF02788; RuBisCO_large_N; 1;
NCBIfam TIGR03326; rubisco_III; 1;

Features [?]

From: RBL_THEKO (O93627)
Key     From     To       Description   Tag   Condition   FTGroup
BINDING     367     369       /ligand="substrate     S-x-G  
BINDING     389     392       /ligand="substrate     Q-x-G-G  
ACT_SITE     163     163       Proton acceptor     K  
ACT_SITE     281     281       Proton acceptor     H  
BINDING     189     189       /ligand="Mg(2+)" /ligand_id="ChEBI:CHEBI:18420" /note="via carbamate group     K   1
BINDING     191     191       /ligand="Mg(2+)" /ligand_id="ChEBI:CHEBI:18420     D   1
BINDING     192     192       /ligand="Mg(2+)" /ligand_id="ChEBI:CHEBI:18420     E   1
BINDING     165     165       /ligand="substrate     K  
BINDING     282     282       /ligand="substrate     R  
BINDING     314     314       /ligand="substrate     H  
SITE     322     322       Transition state stabilizer     K  
MOD_RES     189     189       N6-carboxylysine     K  

Additional information [?]

Size range 410-450 amino acids
Related rules MF_01338 (RBL); MF_01339 (RBL2)
Fusion None