A8A268 (NAPA_ECOHS) Reviewed, UniProtKB/Swiss-Prot

Names and origin

Protein names

Recommended name:
Periplasmic nitrate reductase
EC=1.7.99.4

Gene names

Name:	napA
Ordered Locus Names:	EcHS_A2344

Organism

Escherichia coli O9:H4 (strain HS) [Complete proteome] [HAMAP]

Taxonomic identifier

331112 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Enterobacteriales › Enterobacteriaceae › Escherichia

Protein attributes

Sequence length	828 AA.
Sequence status	Complete.
Sequence processing	The displayed sequence is further processed into a mature form.
Protein existence	Inferred from homology

General annotation (Comments)

Function	Catalytic subunit of the periplasmic nitrate reductase (NAP). Only expressed at high levels during aerobic growth. NapAB complex receives electrons from the membrane-anchored tetraheme protein napC, thus allowing electron flow between membrane and periplasm. Essential function for nitrate assimilation and may have a role in anaerobic metabolism By similarity. HAMAP MF_01630
Catalytic activity	Nitrite + acceptor = nitrate + reduced acceptor. HAMAP MF_01630
Cofactor	Binds 1 4Fe-4S cluster By similarity. HAMAP MF_01630 Binds 1 molybdenum ion per subunit By similarity. HAMAP MF_01630 Binds 2 molybdopterin guanine dinucleotide (MGD) groups per subunit By similarity.
Subunit structure	Interacts with napB By similarity. HAMAP MF_01630
Subcellular location	Periplasm By similarity HAMAP MF_01630.
Post-translational modification	Predicted to be exported by the Tat system. The position of the signal peptide cleavage has not been experimentally proven. HAMAP MF_01630
Sequence similarities	Belongs to the prokaryotic molybdopterin-containing oxidoreductase family. NasA/napA/narB subfamily.

Ontologies

Keywords
Biological process	Electron transport Nitrate assimilation Transport
Cellular component	Periplasm
Domain	Signal
Ligand	4Fe-4S Iron Iron-sulfur Metal-binding Molybdenum
Molecular function	Oxidoreductase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	electron transport chain Inferred from electronic annotation. Source: UniProtKB-KW nitrate assimilation Inferred from electronic annotation. Source: UniProtKB-KW transport Inferred from electronic annotation. Source: UniProtKB-KW
Cellular component	periplasmic space Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	4 iron, 4 sulfur cluster binding Inferred from electronic annotation. Source: UniProtKB-KW electron carrier activity Inferred from electronic annotation. Source: InterPro molybdenum ion binding Inferred from electronic annotation. Source: InterPro nitrate reductase activity Inferred from electronic annotation. Source: EC
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Signal peptide	1 – 31	31	Tat-type signal Potential
	Chain	32 – 828	797	Periplasmic nitrate reductase HAMAP MF_01630		PRO_1000069717
Sites
	Metal binding	46	1	Iron-sulfur (4Fe-4S) By similarity
	Metal binding	49	1	Iron-sulfur (4Fe-4S) By similarity
	Metal binding	53	1	Iron-sulfur (4Fe-4S) By similarity
	Metal binding	81	1	Iron-sulfur (4Fe-4S) By similarity

Sequences

	Sequence		Length	Mass (Da)
	A8A268 [UniParc]. Last modified October 23, 2007. Version 1. Checksum: CE2D7AF500FEAF7A	FASTA	828	93,056
	10 20 30 40 50 60 MKLSRRSFMK ANAVAAAAAA AGLSVPGVAR AVVGQQEAIK WDKAPCRFCG TGCGVLVGTQ 70 80 90 100 110 120 QGRVVACQGD PDAPVNRGLN CIKGYFLPKI MYGKDRLTQP LLRMKNGKYD KEGEFTPITW 130 140 150 160 170 180 DQAFDVMEEK FKTALKEKGP ESIGMFGSGQ WTIWEGYAAS KLFKAGFRSN NIDPNARHCM 190 200 210 220 230 240 ASAVVGFMRT FGMDEPMGCY DDIEQADAFV LWGANMAEMH PILWSRITNR RLSNQNVTVA 250 260 270 280 290 300 VLSTYQHRSF ELADNGIIFT PQSDLVILNY IANYIIQNNA INQDFFSKHV NLRKGATDIG 310 320 330 340 350 360 YGLRPTHPLE KAAKNPGSDA SEPMSFEDYK AFVAEYTLEK TAEMTGVPKD QLEQLAQLYA 370 380 390 400 410 420 DPNKKVISYW TMGFNQHTRG VWANNLVYNL HLLTGKISQP GCGPFSLTGQ PSACGTAREV 430 440 450 460 470 480 GTFAHRLPAD MVVTNEKHRD ICEKKWNIPS GTIPAKIGLH AVAQDRALKD GKLNVYWTMC 490 500 510 520 530 540 TNNMQAGPNI NEERMPGWRD PRNFIIVSDP YPTVSALAAD LILPTAMWVE KEGAYGNAER 550 560 570 580 590 600 RTQFWRQQVQ APGEAKSDLW QLVQFSRRFK TEEVWPEELL AKKPELRGKT LYEVLYATPE 610 620 630 640 650 660 VSKFPVSELA EDQLNDESRE LGFYLQKGLF EEYAWFGRGH GHDLAPFDDY HKARGLRWPV 670 680 690 700 710 720 VNGKETQWRY SEGNDPYVKA GEGYKFYGKP DGKAVIFALP FEPAAEAPDE EYDLWLSTGR 730 740 750 760 770 780 VLEHWHTGSM TRRVPELHRA FPEAVLFIHP LDAKARDLRR GDKVKVVSRR GEVISIVETR 790 800 810 820 GRNRPPQGLV YMPFFDAAQL VNKLTLDATD PLSKETDFKK CAVKLEKV

References

[1]

"The pangenome structure of Escherichia coli: comparative genomic analysis of E. coli commensal and pathogenic isolates." Rasko D.A., Rosovitz M.J., Myers G.S.A., Mongodin E.F., Fricke W.F., Gajer P., Crabtree J., Sebaihia M., Thomson N.R., Chaudhuri R., Henderson I.R., Sperandio V., Ravel J. J. Bacteriol. 190:6881-6893(2008) [PubMed: 18676672] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: HS.

Cross-references

Sequence databases
EMBL GenBank DDBJ	CP000802 Genomic DNA. Translation: ABV06622.1.
RefSeq	YP_001459005.1. NC_009800.1.
3D structure databases
ProteinModelPortal	A8A268.
SMR	A8A268. Positions 1-35, 37-827.
ModBase	Search...
Protein-protein interaction databases
STRING	A8A268.
Protocols and materials databases
StructuralBiologyKnowledgebase	Search...
Genome annotation databases
EnsemblBacteria	EBESCT00000053883; EBESCP00000051868; EBESCG00000052931.
GeneID	5592269.
GenomeReviews	Gene locus EcHS_A2344 in contig CP000802_GR.
KEGG	ecx:EcHS_A2344.
PATRIC	18314676. VBIEscCol77814_2300.
Organism-specific databases
CMR	Search...
Phylogenomic databases
eggNOG	COG0243.
GeneTree	EBGT00050000009000.
HOGENOM	HBG715033.
OMA	NMLYNIH.
ProtClustDB	PRK13532.
Family and domain databases
HAMAP	MF_01630. Nitrate_reduct. [Tree]
InterPro	IPR009010. Asp_de-COase-like_fold. IPR006657. MoPterin_dinucl-bd_dom. IPR006656. Mopterin_OxRdtase. IPR006963. Mopterin_OxRdtase_Fe4S4_dom. IPR006655. Mopterin_OxRdtase_prok_CS. IPR010051. Periplasm_NO3_reductase_lsu. IPR006311. TAT_signal. IPR019546. TAT_signal_bac_arc. [Graphical view]
Gene3D	G3DSA:2.40.40.20. Asp_decarboxylase-like_fold. 1 hit.
KO	K02567.
Pfam	PF04879. Molybdop_Fe4S4. 1 hit. PF00384. Molybdopterin. 1 hit. PF01568. Molydop_binding. 1 hit. [Graphical view]
SMART	SM00926. Molybdop_Fe4S4. 1 hit. [Graphical view]
SUPFAM	SSF50692. Asp_decarb_fold. 1 hit.
TIGRFAMs	TIGR01706. NAPA. 1 hit. TIGR01409. TAT_signal_seq. 1 hit.
PROSITE	PS00551. MOLYBDOPTERIN_PROK_1. 1 hit. PS00490. MOLYBDOPTERIN_PROK_2. False negative. PS00932. MOLYBDOPTERIN_PROK_3. False negative. PS51318. TAT. 1 hit. [Graphical view]
ProtoNet	Search...

Entry information

Entry name

NAPA_ECOHS

Accession

Primary (citable) accession number: A8A268

Entry history

Integrated into UniProtKB/Swiss-Prot:	February 5, 2008
Last sequence update:	October 23, 2007
Last modified:	January 25, 2012
This is version 31 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation program

Prokaryotic Protein Annotation Program