Q7YJW8 · NDHK_CALFG
- ProteinNAD(P)H-quinone oxidoreductase subunit K, chloroplastic
- GenendhK
- StatusUniProtKB reviewed (Swiss-Prot)
- Amino acids225 (go to sequence)
- Protein existenceInferred from homology
- Annotation score3/5
Function
function
NDH shuttles electrons from NAD(P)H:plastoquinone, via FMN and iron-sulfur (Fe-S) centers, to quinones in the photosynthetic chain and possibly in a chloroplast respiratory chain. The immediate electron acceptor for the enzyme in this species is believed to be plastoquinone. Couples the redox reaction to proton translocation, and thus conserves the redox energy in a proton gradient.
Catalytic activity
- a plastoquinone + NADH + (n+1) H+(in) = a plastoquinol + NAD+ + n H+(out)
a plastoquinone RHEA-COMP:9562
+ CHEBI:57945 + (n+1) H+ (in)CHEBI:15378= a plastoquinol RHEA-COMP:9561
+ CHEBI:57540 + n H+ (out)CHEBI:15378 - a plastoquinone + NADPH + (n+1) H+(in) = a plastoquinol + NADP+ + n H+(out)
Cofactor
Note: Binds 1 [4Fe-4S] cluster.
Features
Showing features for binding site.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Binding site | 43 | [4Fe-4S] cluster (UniProtKB | ChEBI) | |||
Binding site | 44 | [4Fe-4S] cluster (UniProtKB | ChEBI) | |||
Binding site | 108 | [4Fe-4S] cluster (UniProtKB | ChEBI) | |||
Binding site | 139 | [4Fe-4S] cluster (UniProtKB | ChEBI) | |||
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | chloroplast thylakoid membrane | |
Cellular Component | respiratory chain complex I | |
Molecular Function | 4 iron, 4 sulfur cluster binding | |
Molecular Function | iron ion binding | |
Molecular Function | NADH dehydrogenase (ubiquinone) activity | |
Molecular Function | quinone binding | |
Biological Process | aerobic respiration | |
Biological Process | electron transport coupled proton transport | |
Biological Process | photosynthesis, light reaction |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameNAD(P)H-quinone oxidoreductase subunit K, chloroplastic
- EC number
- Alternative names
Gene names
Encoded on
- Chloroplast
Organism names
- Taxonomic lineageEukaryota > Viridiplantae > Streptophyta > Embryophyta > Tracheophyta > Spermatophyta > Magnoliopsida > Magnoliidae > Laurales > Calycanthaceae > Calycanthus
Accessions
- Primary accessionQ7YJW8
Subcellular Location
UniProt Annotation
GO Annotation
Plastid, chloroplast thylakoid membrane ; Peripheral membrane protein
Keywords
- Cellular component
PTM/Processing
Features
Showing features for chain.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Chain | PRO_0000358525 | 1-225 | NAD(P)H-quinone oxidoreductase subunit K, chloroplastic | ||
Keywords
- PTM
Interaction
Subunit
NDH is composed of at least 16 different subunits, 5 of which are encoded in the nucleus.
Structure
Sequence
- Sequence statusComplete
- Length225
- Mass (Da)25,265
- Last updated2008-12-16 v2
- MD5 ChecksumB09419357C5844927A0CB0608F7DD279
Sequence caution
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
AJ428413 EMBL· GenBank· DDBJ | CAD28725.1 EMBL· GenBank· DDBJ | Genomic DNA | Different initiation |