HAMAP rule MF_00855
General rule information
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Accession | MF_00855 |
Dates | 20-AUG-2020 (Created) 17-FEB-2023 (Last updated, Version 4) |
Name | RbcX |
Scope | Bacteria; Cyanobacteriota |
Templates | Q44212 (RBCX_ANASC); Q44177 (RBCX_SYNP2): [Recover all] |
Triggered by |
Propagated annotation
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Identifier, protein and gene names
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Identifier |
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Protein name |
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Gene name |
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Comments
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Function | An RbcL-specific chaperone. The central cleft of the RbcX homodimer (RbcX2) binds the C-terminus of an RbcL monomer, stabilizing the C-terminus and probably preventing its reassociation with chaperonin GroEL-ES. At the same time the peripheral region of RbcX2 binds a second RbcL monomer, bridging the RbcL homodimers in the correct orientation. The RbcX2(2)-bound RbcL dimers then assemble into the RbcL8 core (RbcL8-(RbcX2)8). RbcS binding triggers the release of RbcX2. |
Subunit | Homodimer. Interacts with the exposed C-terminal peptide of RbcL via its central cleft, contacts a second RbcL monomer via its peripheral polar surface. |
Subcellular location | Carboxysome. Cytoplasm. Note=Most protein is cytoplasmic, but some is in the carboxysome. |
Domain | The homodimer has 2 functional domains, a central cleft essential for production of soluble RbcL in which the RbcL peptide binds, and a polar surface which plays a role in correct RbcL subunit arrangement. |
Similarity | Belongs to the RbcX family. |
Keywords
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Gene Ontology
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GO:0015977; Biological process: carbon fixation.
GO:0031470; Cellular component: carboxysome.
GO:0005737; Cellular component: cytoplasm.
GO:0110102; Biological process: ribulose bisphosphate carboxylase complex assembly.
GO:0031470; Cellular component: carboxysome.
GO:0005737; Cellular component: cytoplasm.
GO:0110102; Biological process: ribulose bisphosphate carboxylase complex assembly.
Cross-references
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Pfam | PF02341; RcbX; 1; |
Additional information
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Size range | 120-183 amino acids |
Related rules | None |
Fusion | None |