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Protein

Periplasmic nitrate reductase

Gene

napA

Organism
Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961)
Status
Reviewed-Annotation score: -Protein inferred from homologyi

Functioni

Catalytic subunit of the periplasmic nitrate reductase complex NapAB. Receives electrons from NapB and catalyzes the reduction of nitrate to nitrite.UniRule annotation

Catalytic activityi

2 ferrocytochrome + nitrate + 2 H+ = 2 ferricytochrome + nitrite.UniRule annotation

Cofactori

Protein has several cofactor binding sites:
  • [4Fe-4S] clusterUniRule annotationNote: Binds 1 [4Fe-4S] cluster.UniRule annotation
  • Mo-bis(molybdopterin guanine dinucleotide)UniRule annotationNote: Binds 1 molybdenum-bis(molybdopterin guanine dinucleotide) (Mo-bis-MGD) cofactor per subunit.UniRule annotation

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi48Iron-sulfur (4Fe-4S)UniRule annotation1
Metal bindingi51Iron-sulfur (4Fe-4S)UniRule annotation1
Metal bindingi55Iron-sulfur (4Fe-4S)UniRule annotation1
Metal bindingi83Iron-sulfur (4Fe-4S)UniRule annotation1
Binding sitei85Mo-bis(molybdopterin guanine dinucleotide)UniRule annotation1
Binding sitei152Mo-bis(molybdopterin guanine dinucleotide)UniRule annotation1
Binding sitei177Mo-bis(molybdopterin guanine dinucleotide)UniRule annotation1
Binding sitei181Mo-bis(molybdopterin guanine dinucleotide)UniRule annotation1
Binding sitei374Mo-bis(molybdopterin guanine dinucleotide); via amide nitrogenUniRule annotation1
Binding sitei378Mo-bis(molybdopterin guanine dinucleotide)UniRule annotation1
Binding sitei484Mo-bis(molybdopterin guanine dinucleotide); via amide nitrogenUniRule annotation1
Binding sitei533Mo-bis(molybdopterin guanine dinucleotide)UniRule annotation1
Binding sitei560Mo-bis(molybdopterin guanine dinucleotide)UniRule annotation1
Binding sitei794Substrate; via amide nitrogenUniRule annotation1
Binding sitei802Mo-bis(molybdopterin guanine dinucleotide)UniRule annotation1
Binding sitei819Mo-bis(molybdopterin guanine dinucleotide)UniRule annotation1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionOxidoreductase
Biological processElectron transport, Nitrate assimilation, Transport
Ligand4Fe-4S, Iron, Iron-sulfur, Metal-binding, Molybdenum

Enzyme and pathway databases

BioCyciVCHO:VCA0678-MONOMER

Names & Taxonomyi

Protein namesi
Recommended name:
Periplasmic nitrate reductaseUniRule annotation (EC:1.9.6.1UniRule annotation)
Gene namesi
Name:napAUniRule annotation
Ordered Locus Names:VC_A0678
OrganismiVibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961)
Taxonomic identifieri243277 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaVibrionalesVibrionaceaeVibrio
Proteomesi
  • UP000000584 Componenti: Chromosome 2

Subcellular locationi

  • Periplasm UniRule annotation

GO - Cellular componenti

  • nitrate reductase complex Source: TIGR
  • periplasmic space Source: UniProtKB-SubCell

Keywords - Cellular componenti

Periplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Signal peptidei1 – 29Tat-type signalUniRule annotationAdd BLAST29
ChainiPRO_000004600930 – 829Periplasmic nitrate reductaseUniRule annotationAdd BLAST800

Post-translational modificationi

Predicted to be exported by the Tat system. The position of the signal peptide cleavage has not been experimentally proven.UniRule annotation

Interactioni

Subunit structurei

Component of the periplasmic nitrate reductase NapAB complex composed of NapA and NapB.UniRule annotation

Protein-protein interaction databases

STRINGi243277.VCA0678

Structurei

3D structure databases

ProteinModelPortaliQ9KLR4
SMRiQ9KLR4
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Domaini41 – 974Fe-4S Mo/W bis-MGD-typeUniRule annotationAdd BLAST57

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni214 – 221Mo-bis(molybdopterin guanine dinucleotide) bindingUniRule annotation8
Regioni245 – 249Mo-bis(molybdopterin guanine dinucleotide) bindingUniRule annotation5
Regioni264 – 266Mo-bis(molybdopterin guanine dinucleotide) bindingUniRule annotation3
Regioni510 – 511Mo-bis(molybdopterin guanine dinucleotide) bindingUniRule annotation2
Regioni718 – 727Mo-bis(molybdopterin guanine dinucleotide) bindingUniRule annotation10

Sequence similaritiesi

Belongs to the prokaryotic molybdopterin-containing oxidoreductase family. NasA/NapA/NarB subfamily.UniRule annotation

Keywords - Domaini

Signal

Phylogenomic databases

eggNOGiENOG4107QIW Bacteria
COG0243 LUCA
KOiK02567
OMAiTQHWRQQ

Family and domain databases

HAMAPiMF_01630 Nitrate_reduct_NapA, 1 hit
InterProiView protein in InterPro
IPR009010 Asp_de-COase-like_dom_sf
IPR006657 MoPterin_dinucl-bd_dom
IPR006656 Mopterin_OxRdtase
IPR006963 Mopterin_OxRdtase_4Fe-4S_dom
IPR027467 MopterinOxRdtase_cofactor_BS
IPR010051 Periplasm_NO3_reductase_lsu
IPR006311 TAT_signal
PANTHERiPTHR11615:SF123 PTHR11615:SF123, 1 hit
PfamiView protein in Pfam
PF04879 Molybdop_Fe4S4, 1 hit
PF00384 Molybdopterin, 1 hit
PF01568 Molydop_binding, 1 hit
SMARTiView protein in SMART
SM00926 Molybdop_Fe4S4, 1 hit
SUPFAMiSSF50692 SSF50692, 1 hit
TIGRFAMsiTIGR01706 NAPA, 1 hit
PROSITEiView protein in PROSITE
PS51669 4FE4S_MOW_BIS_MGD, 1 hit
PS00551 MOLYBDOPTERIN_PROK_1, 1 hit
PS51318 TAT, 1 hit

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

Q9KLR4-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKMTRRAFVK ANAAASAAAV AGITLPASAT NLIASSDQTA IHWDKAPCRF
60 70 80 90 100
CGTGCSVLVG TQDGRVVATQ GDPEAPVNKG LNCIKGYFLS KIMYGQDRLK
110 120 130 140 150
TPLLRMKDGQ YHKDGEFTPV SWDTAFDVMA EKWKASLKTK GPTSVGMFGS
160 170 180 190 200
GQWTVMEGYA AVKLMKAGFR SNNIDPNARH CMASAVVGFM RTFGIDEPMG
210 220 230 240 250
CYDDFEHADA FVLWGSNMAE MHPVLWTRIT DRRLSHPHVK VNVLSTYYHR
260 270 280 290 300
SFELADHGYI FHPQSDLAIA NFIANYIIQN DAVNWDFVNK HTHFKQAVTD
310 320 330 340 350
IGYGLRDDHP LQKKAKNANS GDVSDISFEE YKKSVAPYTV EKASEISGVS
360 370 380 390 400
PDKLITLAKQ YADPNTKVMS LWTMGMNQHT RGVWMQSLVY NLHLLTGKIA
410 420 430 440 450
TPGNSPFSLT GQPSACGTAR EVGTFAHRLP ADMVVANPKH RAIAEKVWKL
460 470 480 490 500
PEGTIPEKPG FHAVQQDRML KDGVLNCYWV QCNNNMQAGP NINEERLPGY
510 520 530 540 550
RNPENFIVVS DAYPTVTAQA ADLVLPTAMW VEKEGAYGNA ERRTQVWYQQ
560 570 580 590 600
VKTVGESHSD SWQVIEFSKR FKVEDVWPEE LLAKAPQYRG KTLYDVLFKN
610 620 630 640 650
GQVDKFPLSE ARELNDDAHH FGFYIQKGLF EEYAEFGRGH GHDLAPYDVY
660 670 680 690 700
HQVRGLRWPV VDGKETKWRF KEGSDPYAKA GSGWDFYGKP DGKAWIISSP
710 720 730 740 750
YEAPPEMPNE EYDLWLCTGR VLEHWHTGTM TRRVPELYKA VPDALCFMHH
760 770 780 790 800
EDAQARGLRR GDEVLISNSR GEVRVRVETR GRNKPPKGLV FVPFFDARIL
810 820
VNKLILDATD PLSKQTDFKK CPVKITKVA
Length:829
Mass (Da):93,106
Last modified:October 1, 2000 - v1
Checksum:i6B9BEE7A10D99975
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AE003853 Genomic DNA Translation: AAF96578.1
PIRiD82430
RefSeqiNP_233066.1, NC_002506.1
WP_000784576.1, NC_002506.1

Genome annotation databases

EnsemblBacteriaiAAF96578; AAF96578; VC_A0678
GeneIDi2612423
KEGGivch:VCA0678
PATRICifig|243277.26.peg.3302

Similar proteinsi

Entry informationi

Entry nameiNAPA_VIBCH
AccessioniPrimary (citable) accession number: Q9KLR4
Entry historyiIntegrated into UniProtKB/Swiss-Prot: February 7, 2006
Last sequence update: October 1, 2000
Last modified: March 28, 2018
This is version 105 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families

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