Q1Q759 · Q1Q759_KUEST
- ProteinNADH-quinone oxidoreductase subunit B
- GenenuoB
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids212 (go to sequence)
- Protein existenceInferred from homology
- Annotation score3/5
Function
function
NDH-1 shuttles electrons from NADH, via FMN and iron-sulfur (Fe-S) centers, to quinones in the respiratory chain. The immediate electron acceptor for the enzyme in this species is believed to be ubiquinone. Couples the redox reaction to proton translocation (for every two electrons transferred, four hydrogen ions are translocated across the cytoplasmic membrane), and thus conserves the redox energy in a proton gradient.
Catalytic activity
- a quinone + NADH + 5 H+(in) = a quinol + NAD+ + 4 H+(out)
CHEBI:132124 + CHEBI:57945 + 5 H+ (in)CHEBI:15378= CHEBI:24646 + CHEBI:57540 + 4 H+ (out)CHEBI:15378
Cofactor
Note: Binds 1 [4Fe-4S] cluster.
Features
Showing features for binding site.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Binding site | 55 | [4Fe-4S] cluster (UniProtKB | ChEBI) | |||
Binding site | 56 | [4Fe-4S] cluster (UniProtKB | ChEBI) | |||
Binding site | 121 | [4Fe-4S] cluster (UniProtKB | ChEBI) | |||
Binding site | 150 | [4Fe-4S] cluster (UniProtKB | ChEBI) | |||
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | plasma membrane | |
Molecular Function | 4 iron, 4 sulfur cluster binding | |
Molecular Function | iron ion binding | |
Molecular Function | NADH dehydrogenase (ubiquinone) activity | |
Molecular Function | NADH:ubiquinone reductase (non-electrogenic) activity | |
Molecular Function | quinone binding | |
Biological Process | aerobic respiration | |
Biological Process | electron transport coupled proton transport |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameNADH-quinone oxidoreductase subunit B
- EC number
- Alternative names
Gene names
Organism names
- Organism
- Strains
- Taxonomic lineageBacteria > Planctomycetota > Candidatus Brocadiia > Candidatus Brocadiales > Candidatus Brocadiaceae > Candidatus Kuenenia
Accessions
- Primary accessionQ1Q759
Proteomes
Subcellular Location
UniProt Annotation
GO Annotation
Cell membrane ; Peripheral membrane protein
Keywords
- Cellular component
PTM/Processing
Keywords
- PTM
Interaction
Subunit
NDH-1 is composed of 14 different subunits. Subunits NuoB, C, D, E, F, and G constitute the peripheral sector of the complex.
Structure
Family & Domains
Features
Showing features for domain.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Domain | 55-164 | NADH:ubiquinone oxidoreductase-like 20kDa subunit | |||
Sequence similarities
Belongs to the complex I 20 kDa subunit family.
Phylogenomic databases
Family and domain databases
Sequence
- Sequence statusComplete
- Length212
- Mass (Da)23,999
- Last updated2006-05-16 v1
- ChecksumDDEFE4E029A19CBF
Keywords
- Technical term
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
CT573071 EMBL· GenBank· DDBJ | CAJ73410.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
CP049055 EMBL· GenBank· DDBJ | QII11979.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
LT934425 EMBL· GenBank· DDBJ | SOH06461.1 EMBL· GenBank· DDBJ | Genomic DNA |