Reviewed, UniProtKB/Swiss-Prot P0AFC8 (NUOB_ECOL6)

Names and origin

Protein names

Recommended name:
    NADH-quinone oxidoreductase subunit B
    EC=1.6.99.5
Alternative name(s):
    NADH dehydrogenase I subunit B
    NDH-1 subunit B
    NUO2

Gene names

Name:	nuoB
Ordered Locus Names:	c2828

Organism

Escherichia coli O6 [Complete proteome] [HAMAP]

Taxonomic identifier

217992 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Enterobacteriales › Enterobacteriaceae › Escherichia

Protein attributes

Sequence length	220 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is not processed.
Protein existence	Inferred from homology.

General annotation (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 By similarity.
Catalytic activity	NADH + quinone = NAD+ + quinol. HAMAP MF_01356
Cofactor	Binds 1 4Fe-4S cluster By similarity.
Subunit structure	NDH-1 is composed of 13 different subunits. Subunits nuoB, CD, E, F, and G constitute the peripheral sector of the complex By similarity.
Subcellular location	Cell inner membrane; Peripheral membrane protein; Cytoplasmic side By similarity.
Sequence similarities	Belongs to the complex I 20 kDa subunit family.

Ontologies

Keywords
Biological process	Transport
Cellular component	Cell inner membrane Cell membrane Membrane
Ligand	4Fe-4S Iron Iron-sulfur Metal-binding NAD Ubiquinone
Molecular function	Oxidoreductase
PTM	Quinone
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	oxidation reduction Inferred from electronic annotation. Source: HAMAP photosynthesis, light reaction Inferred from electronic annotation. Source: HAMAP transport Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	plasma membrane Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	4 iron, 4 sulfur cluster binding Inferred from electronic annotation. Source: UniProtKB-KW NADH dehydrogenase (ubiquinone) activity Inferred from electronic annotation. Source: InterPro iron ion binding Inferred from electronic annotation. Source: HAMAP quinone binding Inferred from electronic annotation. Source: UniProtKB-KW
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 220	220	NADH-quinone oxidoreductase subunit B HAMAP MF_01356		PRO_0000118767
Sites
	Metal binding	63	1	Iron-sulfur (4Fe-4S) Potential
	Metal binding	64	1	Iron-sulfur (4Fe-4S) Potential
	Metal binding	129	1	Iron-sulfur (4Fe-4S) Potential
	Metal binding	158	1	Iron-sulfur (4Fe-4S) Potential

Sequences

	Sequence		Length	Mass (Da)
	P0AFC8-1 [UniParc]. Last modified December 20, 2005. Version 1. Checksum: EBD6268505993880	FASTA	220	25,056
	10 20 30 40 50 60 MDYTLTRIDP NGENDRYPLQ KQEIVTDPLE QEVNKNVFMG KLNDMVNWGR KNSIWPYNFG 70 80 90 100 110 120 LSCCYVEMVT SFTAVHDVAR FGAEVLRASP RQADLMVVAG TCFTKMAPVI QRLYDQMLEP 130 140 150 160 170 180 KWVISMGACA NSGGMYDIYS VVQGVDKFIP VDVYIPGCPP RPEAYMQALM LLQESIGKER 190 200 210 220 RPLSWVVGDQ GVYRANMQSE RERKRGERIA VTNLRTPDEI

References

[1]

"Extensive mosaic structure revealed by the complete genome sequence of uropathogenic Escherichia coli." Welch R.A., Burland V., Plunkett G. III, Redford P., Roesch P., Rasko D., Buckles E.L., Liou S.-R., Boutin A., Hackett J., Stroud D., Mayhew G.F., Rose D.J., Zhou S., Schwartz D.C., Perna N.T., Mobley H.L.T., Donnenberg M.S., Blattner F.R. Proc. Natl. Acad. Sci. U.S.A. 99:17020-17024(2002) [PubMed: 12471157] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: O6:H1 / CFT073 / ATCC 700928 / UPEC.

Cross-references

Sequence databases
EMBLGenBankDDBJ	AE014075 Genomic DNA. Translation: AAN81282.1.
RefSeq	NP_754714.1.
3D structure databases
ModBase	Search...
Genome annotation databases
GeneID	1038369.
GenomeReviews	Gene locus c2828 in contig AE014075_GR.
KEGG	ecc:c2828.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	P0AFC8.
OMA	P0AFC8. IAGTPFI.
Enzyme and pathway databases
BRENDA	1.6.99.5. 292881.
Family and domain databases
HAMAP	MF_01356. [Tree]
InterPro	IPR006137. NADH_UbQ_OxRdtase-like_20kDa. IPR006138. NADH_UbQ_OxRdtase_su-20kDa. IPR014406. NiFe_hyd_3_ssu/Q_oxred_NuoB. [Graphical view]
PANTHER	PTHR11995:SF2. NADH_DH_20kDa. 1 hit. PTHR11995. NiFe_hyd_3_ssu/Q_oxred_NuoB. 1 hit.
Pfam	PF01058. Oxidored_q6. 1 hit. [Graphical view]
TIGRFAMs	TIGR01957. nuoB_fam. 1 hit.
PROSITE	PS01150. COMPLEX1_20K. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

NUOB_ECOL6

Accession

Primary (citable) accession number: P0AFC8
Secondary accession number(s): P33598 , P78090, P78186, P78187

Entry history

Integrated into UniProtKB/Swiss-Prot:	December 20, 2005
Last sequence update:	December 20, 2005
Last modified:	June 16, 2009
This is version 27 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)