HAMAP rule MF_00855

General rule information [?]

PURL	https://purl.expasy.org/hamap/rule/MF_00855
Accession	MF_00855
Dates	20-AUG-2020 (Created) 17-FEB-2023 (Last updated, Version 5)
Name	RbcX
Scope(s)	Bacteria Cyanobacteriota
Template(s)	Q44212; Q44177; [ Recover all ]
Triggered by	HAMAP; MF_00855 (Get profile general information and statistics)

Propagated annotation [?]

Identifier, protein and gene names [?]

Identifier	RBCX
Protein name	RecName: Full=RuBisCO chaperone RbcX;
Gene name	Name=rbcX;

Comments [?]

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 [?]

Gene Ontology [?]

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

Cross-references [?]

Pfam	PF02341; RcbX; 1;

Features [?]

Additional information [?]