Reviewed, UniProtKB/Swiss-Prot A1SWQ0 (NAPA_PSYIN)

Names and origin

Protein names

Recommended name:
    Periplasmic nitrate reductase
    EC=1.7.99.4

Gene names

Name:	napA
Ordered Locus Names:	Ping_2174

Organism

Psychromonas ingrahamii (strain 37) [Complete proteome] [HAMAP]

Taxonomic identifier

357804 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Alteromonadales › Psychromonadaceae › Psychromonas

Protein attributes

Sequence length	831 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 – 29	29	Tat-type signal Potential
	Chain	30 – 831	802	Periplasmic nitrate reductase HAMAP MF_01630		PRO_5000206772
Sites
	Metal binding	48	1	Iron-sulfur (4Fe-4S) By similarity
	Metal binding	51	1	Iron-sulfur (4Fe-4S) By similarity
	Metal binding	55	1	Iron-sulfur (4Fe-4S) By similarity
	Metal binding	83	1	Iron-sulfur (4Fe-4S) By similarity

Sequences

	Sequence		Length	Mass (Da)
	A1SWQ0-1 [UniParc]. Last modified February 6, 2007. Version 1. Checksum: 504DD2EF62D524E5	FASTA	831	93,213
	10 20 30 40 50 60 MKFTRREFMK AQAAASAAAV AGIALPATAS NLIASQDLTK IKWEKAPCRF CGTGCSVLVG 70 80 90 100 110 120 TQHGRVVATQ GDPESPVNKG LNCVKGYFLS KIMYGKDRLT TPLLRMTEGV YDKNGQFEPV 130 140 150 160 170 180 SWDAAFDIMA DKFKDALKKK GPTAVGMFGS GQWTLWEGYA ASKLMKAGFR TNNLDPNARH 190 200 210 220 230 240 CMASAVGGFM RTFGIDEPMG CYDDLENADV FVLWGSNMAE MHPILWSRLA DRRLSNPDVS 250 260 270 280 290 300 VHVLSTYTHR SFELADNGMI FTPQSDLAIL NFIANYIIQN DAVDKDFIEK HTNFRKGVTD 310 320 330 340 350 360 IGYGLRPTDP LQKAAENPDS GASSPITFEE FAEYVSEFDV DYAVKMSGVP AEKLIELAKV 370 380 390 400 410 420 YADPAKKVVS YWTMGFNQHT RGVWANNLMY NVHLLTGKIS KPGSGPFSLT GQPSACGTAR 430 440 450 460 470 480 EVGTFSHRLP ADLVVANPKH RAIAEKLWKL PEGTIEPKPG YHAVLQNRML KDSKLNAYWV 490 500 510 520 530 540 MCNNNVQAGA NINEEIIPGY RNPENFIVVS DPYPTVTAQM GDLILPTAMW VEKEGAYGNA 550 560 570 580 590 600 ERRTQFWHQQ VKAPEGAKSD LWQLVEFSKR FKIEEVWTED LIAKMPEVRG ETLFDVLYKN 610 620 630 640 650 660 GQVDAFGLDE VADERLNDEA RDFGFYIQKG LFEEYASFGR GHGHDLAPFD QYHEARGLRW 670 680 690 700 710 720 PVVNGKETLW RFREGYDPYV EKGSEVQFYG HPDKKAVIFA LPYEPPAESP DQEYDLWLST 730 740 750 760 770 780 GRVLEHWHSG SMTRRVPELY KAFPDAVVFM HPDDATARGV RRGDEIVLAS RRGELTSRVE 790 800 810 820 830 TRGRNRPPRG LVFMPWFDAK QLVNKITLDA TDPLSKQTDY KKCAVKITKK V

References

[1]

"Complete sequence of Psychromonas ingrahamii 37." Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S., Thompson L.S., Brettin T., Bruce D., Han C., Tapia R., Schmutz J., Larimer F. , Land M., Hauser L., Kyrpides N., Ivanova N., Staley J., Richardson P. Submitted (JAN-2007) to the EMBL/GenBank/DDBJ databases Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBLGenBankDDBJ	CP000510 Genomic DNA. Translation: ABM03915.1.
RefSeq	YP_943514.1.
3D structure databases
SMR	A1SWQ0. Positions 41-829.
ModBase	Search...
Genome annotation databases
GeneID	4625329.
GenomeReviews	Gene locus Ping_2174 in contig CP000510_GR.
KEGG	pin:Ping_2174.
Organism-specific databases
CMR	Search...
Phylogenomic databases
OMA	A1SWQ0. NMLYNIH.
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. 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. [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_PSYIN

Accession

Primary (citable) accession number: A1SWQ0

Entry history

Integrated into UniProtKB/Swiss-Prot:	February 5, 2008
Last sequence update:	February 6, 2007
Last modified:	June 16, 2009
This is version 25 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)