Q56586 · NQRA_VIBAL
- ProteinNa(+)-translocating NADH-quinone reductase subunit A
- GenenqrA
- StatusUniProtKB reviewed (Swiss-Prot)
- Organism
- Amino acids446 (go to sequence)
- Protein existenceEvidence at protein level
- Annotation score3/5
Function
function
NQR complex catalyzes the reduction of ubiquinone-1 to ubiquinol by two successive reactions, coupled with the transport of Na+ ions from the cytoplasm to the periplasm. NqrA to NqrE are probably involved in the second step, the conversion of ubisemiquinone to ubiquinol.
Catalytic activity
- a ubiquinone + H+ + n Na+(in) + NADH = a ubiquinol + n Na+(out) + NAD+
a ubiquinone RHEA-COMP:9565 + CHEBI:15378 + n Na+ (in)CHEBI:29101+ CHEBI:57945 = a ubiquinol RHEA-COMP:9566 + n Na+ (out)CHEBI:29101+ CHEBI:57540
Activity regulation
This reaction is tightly coupled to the Na+ pumping activity and specifically requires Na+ for activity. Inhibited by korormicin and 2-N-heptyl-4-hydroxyquinoline N-oxide (HQNO).
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 | |
---|---|---|
Molecular Function | oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor | |
Biological Process | sodium ion transport |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Protein family/group databases
Names & Taxonomy
Protein names
- Recommended nameNa(+)-translocating NADH-quinone reductase subunit A
- EC number
- Short namesNa(+)-NQR subunit A ; Na(+)-translocating NQR subunit A
- Alternative names
Gene names
Organism names
- Organism
- Strain
- Taxonomic lineageBacteria > Pseudomonadota > Gammaproteobacteria > Vibrionales > Vibrionaceae > Vibrio
Accessions
- Primary accessionQ56586
PTM/Processing
Features
Showing features for chain.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Chain | PRO_0000214203 | 1-446 | Na+-translocating NADH-quinone reductase subunit A | |||
Sequence: MITIKKGLDLPIAGTPSQVINDGKTIKKVALLGEEYVGMRPTMHVRVGDEVKKAQVLFEDKKNPGVKFTAPAAGKVIEVNRGAKRVLQSVVIEVAGEEQVTFDKFEAAQLSGLDREVIKTQLVDSGLWTALRTRPFSKVPAIESSTKAIFVTAMDTNPLAAKPELIINEQQEAFIAGLDILSALTEGKVYVCKSGTSLPRSSQSNVEEHVFDGPHPAGLAGTHMHFLYPVNAENVAWSINYQDVIAFGKLFLTGELYTDRVVSLAGPVVNNPRLVRTVIGASLDDLTDNELMPGEVRVISGSVLTGTHATGPHAYLGRYHQQVSVLREGREKELFGWAMPGKNKFSVTRSFLGHVFKGQLFNMTTTTNGSDRSMVPIGNYERVMPLDMEPTLLLRDLCAGDTDSAQALGALELDEEDLALCTFVCPGKYEYGTLLRECLDTIEKEG |
Interaction
Subunit
Composed of six subunits; NqrA, NqrB, NqrC, NqrD, NqrE and NqrF.
Protein-protein interaction databases
Structure
Sequence
- Sequence statusComplete
- Length446
- Mass (Da)48,623
- Last updated1996-11-01 v1
- Checksum6D65ACAA53FE515C
Features
Showing features for sequence conflict.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Sequence conflict | 337 | in Ref. 4; AA sequence | ||||
Sequence: W → L |
Keywords
- Technical term
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
Z37111 EMBL· GenBank· DDBJ | CAA85476.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
AB008030 EMBL· GenBank· DDBJ | BAA22910.1 EMBL· GenBank· DDBJ | Genomic DNA |