Q5K2W1 · Q5K2W1_9CYAN
- ProteinRuBisCO chaperone RbcX
- GenerbcX
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids135 (go to sequence)
- Protein existenceInferred from homology
- Annotation score2/5
Function
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 RbcX22-bound RbcL dimers then assemble into the RbcL8 core (RbcL8-(RbcX2)8). RbcS binding triggers the release of RbcX2.
GO annotations
all annotations | all molecular function | virus receptor activity | dna binding | rna binding | cytoskeletal motor activity | catalytic activity | gtpase activity | structural molecule activity | transporter activity | cytoskeletal protein binding | lipid binding | cyclase activity | antioxidant activity | oxidoreductase activity | transferase activity | hydrolase activity | lyase activity | isomerase activity | ligase activity | protein tag activity | cargo receptor activity | histone binding | protein folding chaperone | translation regulator activity | nutrient reservoir activity | receptor ligand activity | molecular transducer activity | molecular adaptor activity | toxin activity | cell adhesion mediator activity | molecular function regulator activity | virus coreceptor activity | catalytic activity, acting on a protein | catalytic activity, acting on dna | catalytic activity, acting on rna | molecular carrier activity | transcription regulator activity | general transcription initiation factor activity | molecular sensor activity | molecular sequestering activity | atp-dependent activity | other molecular function | all biological process | mitotic cell cycle | cytokinesis | cytoplasmic translation | immune system process | muscle system process | circulatory system process | renal system process | respiratory system process | carbohydrate metabolic process | generation of precursor metabolites and energy | dna replication | dna repair | dna recombination | chromatin organization | dna-templated transcription | regulation of dna-templated transcription | trna metabolic process | protein folding | protein glycosylation | amino acid metabolic process | modified amino acid metabolic process | lipid metabolic process | vitamin metabolic process | sulfur compound metabolic process | intracellular protein transport | nucleocytoplasmic transport | autophagy | inflammatory response | mitochondrion organization | cytoskeleton organization | microtubule-based movement | peroxisome organization | lysosome organization | chromosome segregation | cell adhesion | establishment or maintenance of cell polarity | programmed cell death | photosynthesis | mrna metabolic process | snrna metabolic process | vesicle-mediated transport | reproductive process | digestive system process | signaling | cell differentiation | protein catabolic process | extracellular matrix organization | regulatory ncrna-mediated gene silencing | telomere organization | cell junction organization | wound healing | ribosome biogenesis | cilium organization | anatomical structure development | cell motility | nervous system process | endocrine process | protein maturation | transmembrane transport | nucleobase-containing small molecule metabolic process | hepaticobiliary system process | membrane organization | protein-containing complex assembly | cell wall organization or biogenesis | nitrogen cycle metabolic process | protein localization to plasma membrane | defense response to other organism | detoxification | meiotic nuclear division | mitotic nuclear division | mitochondrial gene expression | carbohydrate derivative metabolic process | other biological process | all cellular component | nuclear chromosome | extracellular region | extracellular space | cell wall | nucleus | nuclear envelope | nucleoplasm | chromosome | nucleolus | mitochondrion | lysosome | endosome | vacuole | peroxisome | endoplasmic reticulum | golgi apparatus | lipid droplet | microtubule organizing center | cytosol | ribosome | cytoskeleton | plasma membrane | cilium | plastid | thylakoid | external encapsulating structure | extracellular matrix | cytoplasmic vesicle | organelle | other cellular component | |||
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Aspect | Term | |
---|---|---|
Cellular Component | carboxysome | |
Cellular Component | cytoplasm | |
Molecular Function | protein folding chaperone | |
Biological Process | carbon fixation | |
Biological Process | photosynthesis | |
Biological Process | ribulose bisphosphate carboxylase complex assembly |
Keywords
- Molecular function
- Biological process
Names & Taxonomy
Protein names
- Recommended nameRuBisCO chaperone RbcX
Gene names
Organism names
- Organism
- Strains
- Taxonomic lineageBacteria > Cyanobacteriota > Cyanophyceae > Nostocales > Aphanizomenonaceae > Nodularia
Accessions
- Primary accessionQ5K2W1
Subcellular Location
UniProt Annotation
GO Annotation
Note: Most protein is cytoplasmic, but some is in the carboxysome.
Keywords
- Cellular component
Interaction
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.
Structure
Family & Domains
Features
Showing features for region, compositional bias.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Region | 97-135 | Disordered | |||
Compositional bias | 100-114 | Basic and acidic residues | |||
Compositional bias | 115-129 | Polar residues | |||
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.
Sequence similarities
Belongs to the RbcX family.
Family and domain databases
Sequence
- Sequence statusComplete
- Length135
- Mass (Da)15,595
- Last updated2005-02-15 v1
- ChecksumD8E971FF444B3A59
Features
Showing features for compositional bias.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Compositional bias | 100-114 | Basic and acidic residues | |||
Compositional bias | 115-129 | Polar residues | |||
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
DQ185302 EMBL· GenBank· DDBJ | ABB77525.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
KF010335 EMBL· GenBank· DDBJ | AGU03178.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
AJ783695 EMBL· GenBank· DDBJ | CAH04080.1 EMBL· GenBank· DDBJ | Genomic DNA |