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UniProtKB/Swiss-Prot entry P29918


[Entry info] [Name and origin] [References] [Comments] [Cross-references] [Keywords] [Features] [Sequence] [Tools]

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Entry information
Entry name NQO6_PARDE
Primary accession number P29918
Secondary accession numbers None
Integrated into Swiss-Prot on April 1, 1993
Sequence was last modified on April 1, 1993 (Sequence version 1)
Annotations were last modified on    September 2, 2008 (Entry version 45)
Name and origin of the protein
Protein name NADH-quinone oxidoreductase chain 6
Synonyms EC 1.6.99.5
NADH dehydrogenase I, chain 6
NDH-1, chain 6
Gene name
Name: nqo6
From
Paracoccus denitrificans [TaxID: 266] 
Taxonomy Bacteria; Proteobacteria; Alphaproteobacteria; Rhodobacterales; Rhodobacteraceae; Paracoccus.
Protein existence 3: Inferred from homology;
References
[1]
NUCLEOTIDE SEQUENCE [GENOMIC DNA].
STRAIN=ATCC 13543 / NRRL B-3784;
DOI=10.1021/bi00145a009; PubMed=1637825 [NCBI, ExPASy, EBI, Israel, Japan]
Xu X., Matsuno-Yagi A., Yagi T.;
"Gene cluster of the energy-transducing NADH-quinone oxidoreductase of Paracoccus denitrificans: characterization of four structural gene products.";
Biochemistry 31:6925-6932(1992).
Comments
  • 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: NADH + quinone = NAD+ + quinol.
  • COFACTOR: Binds 1 4Fe-4S cluster (Potential).
  • SUBUNIT: NDH-1 is composed of at least 14 different subunits, nqo1 to nqo14. The complex has a L-shaped structure, with the hydrophobic arm (subunits nqo7, nqo8, nqo10 to nqo14) embedded in the inner membrane and the hydrophilic peripheral arm (subunits nqo1 to nqo6, nqo9) protruding into the bacterial cytoplasm. The hydrophilic domain contains all the redox centers.
  • SUBCELLULAR LOCATION: Cell inner membrane; Peripheral membrane protein.
  • 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
M93015; AAA03036.1; ALT_SEQ; Unassigned_DNA.[EMBL / GenBank / DDBJ] [CoDingSequence]
PIR E42573; E42573.
3D structure databases
ModBase P29918.
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.
BLOCKS P29918.
Other
ProtoNet P29918.
UniRef View cluster of proteins with at least 50% / 90% / 100% identity.
Keywords
4Fe-4S; Cell inner membrane; Cell membrane; Iron; Iron-sulfur; Membrane; Metal-binding; NAD; Oxidoreductase; Quinone; Ubiquinone.
Features
SEVIEWER logo Feature table viewer
KeyFrom   To Length Description FTId
CHAIN   1   173  173     NADH-quinone oxidoreductase chain 6. PRO_0000118762
METAL   53    53        Iron-sulfur (4Fe-4S) (Potential). 
METAL   54    54        Iron-sulfur (4Fe-4S) (Potential). 
METAL   118   118        Iron-sulfur (4Fe-4S) (Potential). 
METAL   148   148        Iron-sulfur (4Fe-4S) (Potential). 
Sequence information
Length: 173 AA [This is the length of the unprocessed precursor] Molecular weight: 19117 Da [This is the MW of the unprocessed precursor] CRC64: 587B86578797CAEF [This is a checksum on the sequence]
        10         20         30         40         50         60 
MTGLNTAGAD RDLATAELNR ELQDKGFLLT TTEDIINWAR NGSLHWMTFG LACCAVEMMQ 

        70         80         90        100        110        120 
TSMPRYDLER FGTAPRASPR QSDLMIVAGT LTNKMAPALR KVYDQMPEPR YVISMGSCAN 

       130        140        150        160        170 
GGGYYHYSYS VVRGCDRIVP VDIYVPGCPP TAEALLYGIL QLQRRASGAP ARW 

P29918 in FASTA format

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Tools Sequence analysis tools: ProtParam, ProtScale, Compute pI/Mw, PeptideMass, PeptideCutter, Dotlet (Java)
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