FUNCTION: NDH-1 shuttles electrons from NADH, via FMN and iron-sulfur (Fe-S) centers, to quinones in the respiratory chain. 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 (By similarity).
CATALYTIC ACTIVITY: NADH + quinone = NAD⁺ + quinol.
COFACTOR: Binds 1 4Fe-4S cluster (Potential).
SUBUNIT: Composed of 13 different subunits (By similarity).
SIMILARITY: Belongs to the complex I 20 kDa subunit family.

Copyright

Copyrighted by the UniProt Consortium, see http://www.uniprot.org/terms. Distributed under the Creative Commons Attribution-NoDerivs License.

Cross-references

Sequence databases

EMBL

AE016826; AAO26878.1; -; Genomic_DNA.

[EMBL / GenBank / DDBJ] [CoDingSequence]

RefSeq

NP_777773.1; -.

3D structure databases

ModBase

Q89AU5.

Enzyme and pathway databases

BioCyc

BAPH224915:BBP_144-MON; -.

Ontologies

GO:0051539;	Molecular function: 4 iron, 4 sulfur cluster binding (inferred from electronic annotation from InterPro).
GO:0005506;	Molecular function: iron ion binding (inferred from electronic annotation from UniProtKB-KW).
GO:0008137;	Molecular function: NADH dehydrogenase (ubiquinone) activity (inferred from electronic annotation from InterPro).
GO:0048038;	Molecular function: quinone binding (inferred from electronic annotation from UniProtKB-KW).
GO:0006120;	Biological process: mitochondrial electron transport, NADH to ubiquinone (inferred from electronic annotation from InterPro).
QuickGo view.

Family and domain databases

InterPro

IPR006138; NADH_DHase_20kDa_su.
IPR014406; NiFe_hyd_3_ssu/Q_oxred_NuoB.
IPR006137; OxRdtase_q6.
Graphical view of domain structure.

PANTHER

PTHR11995:SF2; NADH_DH_20kDa; 1.
PTHR11995; NiFe_hyd_3_ssu/Q_oxred_NuoB; 1.

Pfam

PF01058; Oxidored_q6; 1.
Pfam graphical view of domain structure.

TIGRFAMs

TIGR01957; nuoB_fam; 1.

PROSITE

PS01150; COMPLEX1_20K; 1.

Genome annotation databases

GeneID

1058400; -.

GenomeReviews

AE016826_GR; bbp_144.

KEGG

bab:bbp144; -.

Phylogenomic databases

HOGENOM

Q89AU5; -.

Genome annotation databases

CMR

Q89AU5; bbp_144.

Other

UniRef

View cluster of proteins with at least 50% / 90% / 100% identity.

Keywords

4Fe-4S; Complete proteome; Iron; Iron-sulfur; Metal-binding; NAD; Oxidoreductase; Quinone.

Features

Feature table viewer

`Key`	`From To`	`Length`	`Description`	`FTId`
`CHAIN`	`1 222`	`222`	`NADH-quinone oxidoreductase subunit B.`	`PRO_0000118771`
`METAL`	`67 67`		`Iron-sulfur (4Fe-4S) (Potential).`
`METAL`	`68 68`		`Iron-sulfur (4Fe-4S) (Potential).`
`METAL`	`133 133`		`Iron-sulfur (4Fe-4S) (Potential).`
`METAL`	`162 162`		`Iron-sulfur (4Fe-4S) (Potential).`

Sequence information

Length: 222 AA [This is the length of the unprocessed precursor]

Molecular weight: 25606 Da [This is the MW of the unprocessed precursor]

CRC64: ED00C35665AD2BDB [This is a checksum on the sequence]

        10         20         30         40         50         60 
MKYTLTRVNI SDDDQNYPRE KKIQVSDPTK KYIQKNVFMG TLSKVLHNLV NWGRKNSLWP 

        70         80         90        100        110        120 
YNFGLSCCYV EMVTSFTSVH DISRFGSEVL RASPRQADFM VIAGTPFIKM VPIIQRLYDQ 

       130        140        150        160        170        180 
MLEPKWVISM GSCANSGGMY DIYSVVQGVD KFLPVDVYIP GCPPRPEAYI HGLMLLQKSI 

       190        200        210        220 
SKERRPLSWI IGEQGIYKAN FNSEKKNLRK MRNLVKYSQD KN

Q89AU5 in FASTA format

View entry in original UniProtKB/Swiss-Prot format
View entry in raw text format (no links)
Report form for errors/updates in this UniProtKB/Swiss-Prot entry

	BLAST submission on ExPASy/SIB or at NCBI (USA)		Sequence analysis tools: ProtParam, ProtScale, Compute pI/Mw, PeptideMass, PeptideCutter, Dotlet (Java)
	ScanProsite, MotifScan		Submit a homology modeling request to SWISS-MODEL
	NPSA Sequence analysis tools