Reviewed, UniProtKB/Swiss-Prot Q8ZNH6 (NAPA_SALTY)

Names and origin

Protein names

Recommended name:
    Periplasmic nitrate reductase
    EC=1.7.99.4

Gene names

Name:	napA
Ordered Locus Names:	STM2259

Organism

Salmonella typhimurium [Complete proteome] [HAMAP]

Taxonomic identifier

90371 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Enterobacteriales › Enterobacteriaceae › Salmonella

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.
Catalytic activity	Nitrite + acceptor = nitrate + reduced acceptor. HAMAP MF_01630
Cofactor	Binds 1 4Fe-4S cluster By similarity. Binds 1 molybdenum ion per subunit By similarity. Binds 2 molybdopterin guanine dinucleotide (MGD) groups per subunit By similarity.
Subunit structure	Interacts with napB By similarity.
Subcellular location	Periplasm By similarity.
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	Mo-molybdopterin cofactor biosynthetic process Inferred from electronic annotation. Source: HAMAP electron transport chain Inferred from electronic annotation. Source: UniProtKB-KW nitrate assimilation Inferred from electronic annotation. Source: HAMAP 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: HAMAP iron ion binding Inferred from electronic annotation. Source: HAMAP molybdenum ion binding Inferred from electronic annotation. Source: UniProtKB-KW nitrate reductase activity Inferred from electronic annotation. Source: HAMAP
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_0000046002
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)
	Q8ZNH6-1 [UniParc]. Last modified March 1, 2002. Version 1. Checksum: 0CF99BC8B2509A85	FASTA	828	92,874
	10 20 30 40 50 60 MKLSRRSFMK ANAVAAAAAA AGLSVPGVAR AVVGQQEAIK WDKAPCRFCG TGCGVLVGTQ 70 80 90 100 110 120 QGRVVACQGD PDAPVNRGLN CIKGYFLPKI MYGKDRLTQP MLRMKDGSYH KDGEFTPVSW 130 140 150 160 170 180 EQAFDVMEEK FKTSLKEKGP EAIGMFGSGQ WTIWEGYAAA KLFKAGFRSN NIDPNARHCM 190 200 210 220 230 240 ASAVVGFMRT FGMDEPMGCY DDIEQADAFV LWGSNMAEMH PILWSRITNR RLSDPNVKVA 250 260 270 280 290 300 VLSTFQHRSF ELADNGIVFT PQSDLVILNY IANYIIQNNA VNQDFFTKHV NLRKGATDIG 310 320 330 340 350 360 YGLRPTHPLE KAAKNPGSDA SEPMSFDEYK AFVAEYTLDK TAEMTGVPKD QLEQLAQLYA 370 380 390 400 410 420 DPNKRVISYW TMGFNQHTRG VWANNLVYNL HLLTGKISQP GCGPFSLTGQ PSACGTAREV 430 440 450 460 470 480 GTFSHRLPAD MVVTNEKHRD ICEKHWQIPA GTIPAKVGLH AVAQDRALKD GKLNVYWVMC 490 500 510 520 530 540 NNNMQAGPNI NEDRMPGWRD PRNFIIVSDP YPTVSALSAD LILPTAMWVE KEGAYGNAER 550 560 570 580 590 600 RTQFWRQQIK APGEAKSDLW QLVQFSRRFK TEEVWPEALL AQKPELRGKT LYDVLFATPA 610 620 630 640 650 660 VSKFPLSELK EDQLNDESRE LGFYLQKGLF EEYAWFGRGH GHDLAPFDDY HNARGLRWPV 670 680 690 700 710 720 VEGKETQWRY SEGNDPYVKA GEGYKFYGKP DGKAVIFALP FEPAAESPDN EYDLWLSTGR 730 740 750 760 770 780 VLEHWHTGSM TRRVPELHRA FPEAVVFIHP LDAKARDLRR GDKVKVSSRR GEVISIVETR 790 800 810 820 GRNRPPQGLV YMPFFDAAQL VNNLTLDATD PLSKETDFKK CAVKLAKV

References

[1]

"Complete genome sequence of Salmonella enterica serovar Typhimurium LT2." McClelland M., Sanderson K.E., Spieth J., Clifton S.W., Latreille P., Courtney L., Porwollik S., Ali J., Dante M., Du F., Hou S., Layman D., Leonard S., Nguyen C., Scott K., Holmes A., Grewal N., Mulvaney E. , Ryan E., Sun H., Florea L., Miller W., Stoneking T., Nhan M., Waterston R., Wilson R.K. Nature 413:852-856(2001) [PubMed: 11677609] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. Strain: LT2 / SGSC1412 / ATCC 700720.

Cross-references

Sequence databases
EMBLGenBankDDBJ	AE008801 Genomic DNA. Translation: AAL21161.1.
RefSeq	NP_461202.1.
3D structure databases
HSSP	HSSP built from PDB template 1OGY based on UniProtKB Q53176.
SMR	Q8ZNH6. Positions 37-827.
ModBase	Search...
Genome annotation databases
GeneID	1253781.
GenomeReviews	Gene locus STM2259 in contig AE006468_GR.
KEGG	stm:STM2259.
Organism-specific databases
CMR	Search...
Phylogenomic databases
HOGENOM	Q8ZNH6.
OMA	Q8ZNH6. NMLYNIH.
Enzyme and pathway databases
BioCyc	STYP99287:STM2259-MON.
BRENDA	1.7.99.4. 2.
Family and domain databases
HAMAP	MF_01630. [Tree]
InterPro	IPR009010. Asp_de-COase-like_fold. IPR006656. Mopterin_OxRdtase. IPR006963. Mopterin_OxRdtase_Fe4S4. IPR006655. Mopterin_OxRdtase_prok_CS. IPR006657. MPT_dinuc_bd. IPR010051. NO3_reductase_lsu_periplasm. IPR006311. Tat. IPR019546. TAT_signal. IPR017909. Twin_arg_translocation_Tat. [Graphical view]
Gene3D	G3DSA:2.40.40.20. Asp_decarboxylase-like_fold. 1 hit.
Pfam	PF04879. Molybdop_Fe4S4. 1 hit. PF00384. Molybdopterin. 1 hit. PF01568. Molydop_binding. 1 hit. PF10518. TAT_signal. 1 hit. [Graphical view]
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_SALTY

Accession

Primary (citable) accession number: Q8ZNH6

Entry history

Integrated into UniProtKB/Swiss-Prot:	February 7, 2006
Last sequence update:	March 1, 2002
Last modified:	June 16, 2009
This is version 47 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)