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UniProtKB - P27896 (NARQ_ECOLI)

Entry version 172 (10 Feb 2021)
Sequence version 1 (01 Aug 1992)
Previous versions | rss
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Protein

Nitrate/nitrite sensor protein NarQ

Gene

narQ

Organism
Escherichia coli (strain K12)
Status
Reviewed-Annotation score:

Annotation score:4 out of 5

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>-Experimental evidence at protein leveli <p>This indicates the type of evidence that supports the existence of the protein. Note that the 'protein existence' evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni

Acts as a sensor for nitrate/nitrite and transduces signal of nitrate/nitrite availability to the NarL/NarP proteins. NarQ probably activates NarL and NarP by phosphorylation. NarQ probably negatively regulates the NarL protein by dephosphorylation.

<p>This subsection of the <a href="http://www.uniprot.org/help/function%5Fsection">Function</a> section describes the catalytic activity of an enzyme, i.e. a chemical reaction that the enzyme catalyzes.<p><a href='/help/catalytic_activity' target='_top'>More...</a></p>Catalytic activityi

  • ATP + protein L-histidine = ADP + protein N-phospho-L-histidine. EC:2.7.13.3

<p>The <a href="http://www.geneontology.org/">Gene Ontology (GO)</a> project provides a set of hierarchical controlled vocabulary split into 3 categories:<p><a href='/help/gene_ontology' target='_top'>More...</a></p>GO - Molecular functioni

  • ATP binding Source: UniProtKB-KW
  • phosphorelay sensor kinase activity Source: EcoCyc
  • protein dimerization activity Source: InterPro
Complete GO annotation on QuickGO ...

GO - Biological processi

Complete GO annotation on QuickGO ...

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

Molecular functionKinase, Transferase
Biological processNitrate assimilation, Two-component regulatory system
LigandATP-binding, Nucleotide-binding

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...BioCyci		EcoCyc:NARQ-MONOMER

BRENDA Comprehensive Enzyme Information System

More...BRENDAi		2.7.13.3, 2026

<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Nitrate/nitrite sensor protein NarQ (EC:2.7.13.3)
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: 'Name', 'Synonyms', 'Ordered locus names' and 'ORF names'.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
Name:narQ
Ordered Locus Names:b2469, JW2453
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>OrganismiEscherichia coli (strain K12)
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the 'taxonomic identifier' or 'taxid'.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri83333 [NCBI]
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineageiBacteria › Proteobacteria › Gammaproteobacteria › Enterobacterales › Enterobacteriaceae › Escherichia ›
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
  • UP000000318 <p>A UniProt <a href="http://www.uniprot.org/manual/proteomes%5Fmanual">proteome</a> can consist of several components.<br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome
  • UP000000625 Componenti: Chromosome

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular%5Flocation%5Fsection">'Subcellular location'</a> section describes the subcellular compartment where each non-membrane region of a membrane-spanning protein is found.<p><a href='/help/topo_dom' target='_top'>More...</a></p>Topological domaini1 – 13CytoplasmicSequence analysisAdd BLAST13
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular%5Flocation%5Fsection">'Subcellular location'</a> section describes the extent of a membrane-spanning region of the protein. It denotes the presence of both alpha-helical transmembrane regions and the membrane spanning regions of beta-barrel transmembrane proteins.<p><a href='/help/transmem' target='_top'>More...</a></p>Transmembranei14 – 34HelicalSequence analysisAdd BLAST21
Topological domaini35 – 146PeriplasmicSequence analysisAdd BLAST112
Transmembranei147 – 167HelicalSequence analysisAdd BLAST21
Topological domaini168 – 566CytoplasmicSequence analysisAdd BLAST399

GO - Cellular componenti

Complete GO annotation on QuickGO ...

Keywords - Cellular componenti

Cell inner membrane, Cell membrane, Membrane

<p>This section describes post-translational modifications (PTMs) and/or processing events.<p><a href='/help/ptm_processing_section' target='_top'>More...</a></p>PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the mature protein following processing or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00000748101 – 566Nitrate/nitrite sensor protein NarQAdd BLAST566

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'PTM / Processing' section specifies the position and type of each modified residue excluding <a href="http://www.uniprot.org/manual/lipid">lipids</a>, <a href="http://www.uniprot.org/manual/carbohyd">glycans</a> and <a href="http://www.uniprot.org/manual/crosslnk">protein cross-links</a>.<p><a href='/help/mod_res' target='_top'>More...</a></p>Modified residuei370Phosphohistidine; by autocatalysisPROSITE-ProRule annotation1

Keywords - PTMi

Phosphoprotein

Proteomic databases

PaxDb, a database of protein abundance averages across all three domains of life

More...PaxDbi		P27896

PRoteomics IDEntifications database

More...PRIDEi		P27896

<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

GO - Molecular functioni

Complete GO annotation on QuickGO ...

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

More...BioGRIDi		4260928, 11 interactors
851287, 2 interactors

Database of interacting proteins

More...DIPi		DIP-10318N

Protein interaction database and analysis system

More...IntActi		P27896, 12 interactors

STRING: functional protein association networks

More...STRINGi		511145.b2469

<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei

Secondary structure

1566
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details

3D structure databases

SWISS-MODEL Repository - a database of annotated 3D protein structure models

More...SMRi		P27896

Database of comparative protein structure models

More...ModBasei		Search...

Protein Data Bank in Europe - Knowledge Base

More...PDBe-KBi		Search...

<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Domains and Repeats

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/family%5Fand%5Fdomains%5Fsection">Family and Domains</a> section describes the position and type of a domain, which is defined as a specific combination of secondary structures organized into a characteristic three-dimensional structure or fold.<p><a href='/help/domain' target='_top'>More...</a></p>Domaini174 – 227HAMPPROSITE-ProRule annotationAdd BLAST54
Domaini364 – 559Histidine kinasePROSITE-ProRule annotationAdd BLAST196

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...eggNOGi		COG3850, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...HOGENOMi		CLU_000445_20_10_6

InParanoid: Eukaryotic Ortholog Groups

More...InParanoidi		P27896

Database for complete collections of gene phylogenies

More...PhylomeDBi		P27896

Family and domain databases

Conserved Domains Database

More...CDDi		cd06225, HAMP, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

More...Gene3Di		1.20.120.960, 1 hit
3.30.565.10, 1 hit

Integrated resource of protein families, domains and functional sites

More...InterProi		View protein in InterPro
IPR003660, HAMP_dom
IPR003594, HATPase_C
IPR036890, HATPase_C_sf
IPR005467, His_kinase_dom
IPR029095, NarX-like_N
IPR042295, NarX-like_N_sf
IPR016380, Sig_transdc_His_kin_NarX/NarQ
IPR011712, Sig_transdc_His_kin_sub3_dim/P

Pfam protein domain database

More...Pfami		View protein in Pfam
PF00672, HAMP, 1 hit
PF02518, HATPase_c, 1 hit
PF07730, HisKA_3, 1 hit
PF13675, PilJ, 1 hit

PIRSF; a whole-protein classification database

More...PIRSFi		PIRSF003167, STHK_NarX/NarQ, 1 hit

Simple Modular Architecture Research Tool; a protein domain database

More...SMARTi		View protein in SMART
SM00304, HAMP, 1 hit
SM00387, HATPase_c, 1 hit

Superfamily database of structural and functional annotation

More...SUPFAMi		SSF55874, SSF55874, 1 hit

PROSITE; a protein domain and family database

More...PROSITEi		View protein in PROSITE
PS50885, HAMP, 1 hit
PS50109, HIS_KIN, 1 hit

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence%5Flength">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>. The information is filed in different subsections. The current subsections and their content are listed below:<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences%5Fsection">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

P27896-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MIVKRPVSAS LARAFFYIVL LSILSTGIAL LTLASSLRDA EAINIAGSLR 
        60         70         80         90        100
MQSYRLGYDL QSGSPQLNAH RQLFQQALHS PVLTNLNVWY VPEAVKTRYA 
       110        120        130        140        150
HLNANWLEMN NRLSKGDLPW YQANINNYVN QIDLFVLALQ HYAERKMLLV 
       160        170        180        190        200
VAISLAGGIG IFTLVFFTLR RIRHQVVAPL NQLVTASQRI EHGQFDSPPL 
       210        220        230        240        250
DTNLPNELGL LAKTFNQMSS ELHKLYRSLE ASVEEKTRDL HEAKRRLEVL 
       260        270        280        290        300
YQCSQALNTS QIDVHCFRHI LQIVRDNEAA EYLELNVGEN WRISEGQPNP 
       310        320        330        340        350
ELPMQILPVT MQETVYGELH WQNSHVSSSE PLLNSVSSML GRGLYFNQAQ 
       360        370        380        390        400
KHFQQLLLME ERATIARELH DSLAQVLSYL RIQLTLLKRS IPEDNATAQS 
       410        420        430        440        450
IMADFSQALN DAYRQLRELL TTFRLTLQQA DLPSALREML DTLQNQTSAK 
       460        470        480        490        500
LTLDCRLPTL ALDAQMQVHL LQIIREAVLN AMKHANASEI AVSCVTAPDG 
       510        520        530        540        550
NHTVYIRDNG IGIGEPKEPE GHYGLNIMRE RAERLGGTLT FSQPSGGGTL 
       560 
VSISFRSAEG EESQLM
Length:566
Mass (Da):63,697
Last modified:August 1, 1992 - v1
<p>The checksum is a form of redundancy check that is calculated from the sequence. It is useful for tracking sequence updates.</p> <p>It should be noted that while, in theory, two different sequences could have the same checksum value, the likelihood that this would happen is extremely low.</p> <p>However UniProtKB may contain entries with identical sequences in case of multiple genes (paralogs).</p> <p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64) using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1. The algorithm is described in the ISO 3309 standard. </p> <p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br /> <strong>Cyclic redundancy and other checksums</strong><br /> <a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p> Checksum:i1D08EA5BD328ACE2
GO

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...EMBLi

GenBank nucleotide sequence database

More...GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...DDBJi
Links Updated
M94724 Genomic DNA Translation: AAA24202.1
X65714 Genomic DNA Translation: CAA46630.1
U00096 Genomic DNA Translation: AAC75522.1
AP009048 Genomic DNA Translation: BAA16343.1
U12598 Genomic DNA Translation: AAA20583.1

Protein sequence database of the Protein Information Resource

More...PIRi		D65022

NCBI Reference Sequences

More...RefSeqi		NP_416964.1, NC_000913.3
WP_001300881.1, NZ_CP014272.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...EnsemblBacteriai		AAC75522; AAC75522; b2469
BAA16343; BAA16343; BAA16343

Database of genes from NCBI RefSeq genomes

More...GeneIDi		57729465
946948

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...KEGGi		ecj:JW2453
eco:b2469

Pathosystems Resource Integration Center (PATRIC)

More...PATRICi		fig|511145.12.peg.2563

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M94724 Genomic DNA Translation: AAA24202.1
X65714 Genomic DNA Translation: CAA46630.1
U00096 Genomic DNA Translation: AAC75522.1
AP009048 Genomic DNA Translation: BAA16343.1
U12598 Genomic DNA Translation: AAA20583.1
PIRiD65022
RefSeqiNP_416964.1, NC_000913.3
WP_001300881.1, NZ_CP014272.1

3D structure databases

Select the link destinations:

Protein Data Bank Europe

More...PDBei

Protein Data Bank RCSB

More...RCSB PDBi

Protein Data Bank Japan

More...PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
5IJIX-ray1.94A1-230[»]
5JEFX-ray2.42A/B1-230[»]
5JEQX-ray1.90A1-230[»]
5JGPX-ray2.70A1-230[»]
6XYNX-ray2.30A1-230[»]
6YUEX-ray2.40A1-230[»]
SMRiP27896
ModBaseiSearch...
PDBe-KBiSearch...

Protein-protein interaction databases

BioGRIDi4260928, 11 interactors
851287, 2 interactors
DIPiDIP-10318N
IntActiP27896, 12 interactors
STRINGi511145.b2469

Proteomic databases

PaxDbiP27896
PRIDEiP27896

Genome annotation databases

EnsemblBacteriaiAAC75522; AAC75522; b2469
BAA16343; BAA16343; BAA16343
GeneIDi57729465
946948
KEGGiecj:JW2453
eco:b2469
PATRICifig|511145.12.peg.2563

Organism-specific databases

EchoBASE - an integrated post-genomic database for E. coli

More...EchoBASEi		EB1429

Phylogenomic databases

eggNOGiCOG3850, Bacteria
HOGENOMiCLU_000445_20_10_6
InParanoidiP27896
PhylomeDBiP27896

Enzyme and pathway databases

BioCyciEcoCyc:NARQ-MONOMER
BRENDAi2.7.13.3, 2026

Miscellaneous databases

Protein Ontology

More...PROi		PR:P27896

Family and domain databases

CDDicd06225, HAMP, 1 hit
Gene3Di1.20.120.960, 1 hit
3.30.565.10, 1 hit
InterProiView protein in InterPro
IPR003660, HAMP_dom
IPR003594, HATPase_C
IPR036890, HATPase_C_sf
IPR005467, His_kinase_dom
IPR029095, NarX-like_N
IPR042295, NarX-like_N_sf
IPR016380, Sig_transdc_His_kin_NarX/NarQ
IPR011712, Sig_transdc_His_kin_sub3_dim/P
PfamiView protein in Pfam
PF00672, HAMP, 1 hit
PF02518, HATPase_c, 1 hit
PF07730, HisKA_3, 1 hit
PF13675, PilJ, 1 hit
PIRSFiPIRSF003167, STHK_NarX/NarQ, 1 hit
SMARTiView protein in SMART
SM00304, HAMP, 1 hit
SM00387, HATPase_c, 1 hit
SUPFAMiSSF55874, SSF55874, 1 hit
PROSITEiView protein in PROSITE
PS50885, HAMP, 1 hit
PS50109, HIS_KIN, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...ProtoNeti		Search...

MobiDB: a database of protein disorder and mobility annotations

More...MobiDBi		Search...

<p>This section provides general information on the entry.<p><a href='/help/entry_information_section' target='_top'>More...</a></p>Entry informationi

<p>This subsection of the 'Entry information' section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry nameiNARQ_ECOLI
<p>This subsection of the 'Entry information' section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called 'Primary (citable) accession number'.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>AccessioniPrimary (citable) accession number: P27896
<p>This subsection of the 'Entry information' section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification ('Last modified'). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical%5Fand%5Fisoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: August 1, 1992
Last sequence update: August 1, 1992
Last modified: February 10, 2021
This is version 172 of the entry and version 1 of the sequence. See complete history.
<p>This subsection of the 'Entry information' section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

<p>This section contains any relevant information that doesn't fit in any other defined sections<p><a href='/help/miscellaneous_section' target='_top'>More...</a></p>Miscellaneousi

Keywords - Technical termi

3D-structure, Reference proteome

Documents

  1. PDB cross-references
    Index of Protein Data Bank (PDB) cross-references
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