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Entry version 103 (13 Nov 2019)
Sequence version 1 (20 Dec 2005)
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Protein

Multidrug export protein EmrB

Gene

emrB

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

Part of the tripartite efflux system EmrAB-TolC, which confers resistance to antibiotics such as CCCP, FCCP, 2,4-dinitrophenol and nalidixic acid.2 Publications

<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

GO - Biological processi

  • response to antibiotic Source: UniProtKB-KW
  • response to toxic substance Source: EcoCyc
  • transmembrane transport Source: GO_Central

<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

Biological processAntibiotic resistance, Transport

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
EcoCyc:EMRB-MONOMER
ECOL316407:JW2661-MONOMER
MetaCyc:EMRB-MONOMER

Protein family/group databases

Transport Classification Database

More...
TCDBi
2.A.1.3.2 the major facilitator superfamily (mfs)

<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_and_taxonomy_section">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:
Multidrug export protein EmrB
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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:emrB
Ordered Locus Names:b2686, JW2661
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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_and_taxonomy_section">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_and_taxonomy_section">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 lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesEnterobacteriaceaeEscherichia
<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">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_manual">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_location_section">'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 – 12CytoplasmicSequence analysisAdd BLAST12
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular_location_section">'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>Transmembranei13 – 38HelicalSequence analysisAdd BLAST26
Topological domaini39 – 51ExtracellularSequence analysisAdd BLAST13
Transmembranei52 – 72HelicalSequence analysisAdd BLAST21
Topological domaini73 – 81CytoplasmicSequence analysis9
Transmembranei82 – 100HelicalSequence analysisAdd BLAST19
Topological domaini101 – 109ExtracellularSequence analysis9
Transmembranei110 – 128HelicalSequence analysisAdd BLAST19
Topological domaini129 – 136CytoplasmicSequence analysis8
Transmembranei137 – 159HelicalSequence analysisAdd BLAST23
Topological domaini160 – 164ExtracellularSequence analysis5
Transmembranei165 – 189HelicalSequence analysisAdd BLAST25
Topological domaini190 – 202CytoplasmicSequence analysisAdd BLAST13
Transmembranei203 – 223HelicalSequence analysisAdd BLAST21
Topological domaini224 – 233ExtracellularSequence analysis10
Transmembranei234 – 249HelicalSequence analysisAdd BLAST16
Topological domaini250 – 271CytoplasmicSequence analysisAdd BLAST22
Transmembranei272 – 295HelicalSequence analysisAdd BLAST24
Topological domaini296 – 305ExtracellularSequence analysis10
Transmembranei306 – 329HelicalSequence analysisAdd BLAST24
Topological domaini330 – 335CytoplasmicSequence analysis6
Transmembranei336 – 355HelicalSequence analysisAdd BLAST20
Topological domaini356 – 363ExtracellularSequence analysis8
Transmembranei364 – 387HelicalSequence analysisAdd BLAST24
Topological domaini388 – 407CytoplasmicSequence analysisAdd BLAST20
Transmembranei408 – 428HelicalSequence analysisAdd BLAST21
Topological domaini429 – 481ExtracellularSequence analysisAdd BLAST53
Transmembranei482 – 504HelicalSequence analysisAdd BLAST23
Topological domaini505 – 512CytoplasmicSequence analysis8

GO - Cellular componenti

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.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_00001733221 – 512Multidrug export protein EmrBAdd BLAST512

Proteomic databases

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

More...
PaxDbi
P0AEJ0

PRoteomics IDEntifications database

More...
PRIDEi
P0AEJ0

<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

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Part of the tripartite efflux system EmrAB-TolC, which is composed of an inner membrane transporter, EmrB, a periplasmic membrane fusion protein, EmrA, and an outer membrane component, TolC. The complex forms a large protein conduit and can translocate molecules across both the inner and outer membranes.

Interacts with EmrA. EmrAB complex forms a dimer in vitro.

2 Publications

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGrid)

More...
BioGridi
4263179, 251 interactors

ComplexPortal: manually curated resource of macromolecular complexes

More...
ComplexPortali
CPX-4268 EmrAB-TolC multidrug efflux transport system

STRING: functional protein association networks

More...
STRINGi
511145.b2686

<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

Compositional bias

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Family and Domains’ section describes the position of regions of compositional bias within the protein and the particular amino acids that are over-represented within those regions.<p><a href='/help/compbias' target='_top'>More...</a></p>Compositional biasi505 – 510Poly-Gly6

<p>This subsection of the ‘Family and domains’ section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
ENOG4105C0R Bacteria
ENOG410XNN3 LUCA

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
HOG000112190

InParanoid: Eukaryotic Ortholog Groups

More...
InParanoidi
P0AEJ0

KEGG Orthology (KO)

More...
KOi
K03446

Database for complete collections of gene phylogenies

More...
PhylomeDBi
P0AEJ0

Family and domain databases

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR004638 EmrB-like
IPR011701 MFS
IPR020846 MFS_dom
IPR036259 MFS_trans_sf
IPR001411 Tet-R_TetB/Drug-R_transptr

The PANTHER Classification System

More...
PANTHERi
PTHR23501 PTHR23501, 1 hit

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF07690 MFS_1, 1 hit

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF103473 SSF103473, 1 hit

TIGRFAMs; a protein family database

More...
TIGRFAMsi
TIGR00711 efflux_EmrB, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS50850 MFS, 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_length">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_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">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.

P0AEJ0-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MQQQKPLEGA QLVIMTIALS LATFMQVLDS TIANVAIPTI AGNLGSSLSQ
60 70 80 90 100
GTWVITSFGV ANAISIPLTG WLAKRVGEVK LFLWSTIAFA IASWACGVSS
110 120 130 140 150
SLNMLIFFRV IQGIVAGPLI PLSQSLLLNN YPPAKRSIAL ALWSMTVIVA
160 170 180 190 200
PICGPILGGY ISDNYHWGWI FFINVPIGVA VVLMTLQTLR GRETRTERRR
210 220 230 240 250
IDAVGLALLV IGIGSLQIML DRGKELDWFS SQEIIILTVV AVVAICFLIV
260 270 280 290 300
WELTDDNPIV DLSLFKSRNF TIGCLCISLA YMLYFGAIVL LPQLLQEVYG
310 320 330 340 350
YTATWAGLAS APVGIIPVIL SPIIGRFAHK LDMRRLVTFS FIMYAVCFYW
360 370 380 390 400
RAYTFEPGMD FGASAWPQFI QGFAVACFFM PLTTITLSGL PPERLAAASS
410 420 430 440 450
LSNFTRTLAG SIGTSITTTM WTNRESMHHA QLTESVNPFN PNAQAMYSQL
460 470 480 490 500
EGLGMTQQQA SGWIAQQITN QGLIISANEI FWMSAGIFLV LLGLVWFAKP
510
PFGAGGGGGG AH
Length:512
Mass (Da):55,624
Last modified:December 20, 2005 - 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:i070334E68B303EFF
GO

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Sequence’ section reports difference(s) between the canonical sequence (displayed by default in the entry) and the different sequence submissions merged in the entry. These various submissions may originate from different sequencing projects, different types of experiments, or different biological samples. Sequence conflicts are usually of unknown origin.<p><a href='/help/conflict' target='_top'>More...</a></p>Sequence conflicti325G → A in AAA23725 (PubMed:1409590).Curated1
Sequence conflicti501P → A in AAA23725 (PubMed:1409590).Curated1

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

More...
EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
M86657 Genomic DNA Translation: AAA23725.1
U00096 Genomic DNA Translation: AAC75733.1
AP009048 Genomic DNA Translation: BAA16548.1

Protein sequence database of the Protein Information Resource

More...
PIRi
G65048

NCBI Reference Sequences

More...
RefSeqi
NP_417171.1, NC_000913.3
WP_001295176.1, NZ_STEB01000042.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
AAC75733; AAC75733; b2686
BAA16548; BAA16548; BAA16548

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
947167

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ecj:JW2661
eco:b2686

Pathosystems Resource Integration Center (PATRIC)

More...
PATRICi
fig|1411691.4.peg.4053

<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
M86657 Genomic DNA Translation: AAA23725.1
U00096 Genomic DNA Translation: AAC75733.1
AP009048 Genomic DNA Translation: BAA16548.1
PIRiG65048
RefSeqiNP_417171.1, NC_000913.3
WP_001295176.1, NZ_STEB01000042.1

3D structure databases

Database of comparative protein structure models

More...
ModBasei
Search...

SWISS-MODEL Interactive Workspace

More...
SWISS-MODEL-Workspacei
Submit a new modelling project...

Protein-protein interaction databases

BioGridi4263179, 251 interactors
ComplexPortaliCPX-4268 EmrAB-TolC multidrug efflux transport system
STRINGi511145.b2686

Protein family/group databases

TCDBi2.A.1.3.2 the major facilitator superfamily (mfs)

Proteomic databases

PaxDbiP0AEJ0
PRIDEiP0AEJ0

Genome annotation databases

EnsemblBacteriaiAAC75733; AAC75733; b2686
BAA16548; BAA16548; BAA16548
GeneIDi947167
KEGGiecj:JW2661
eco:b2686
PATRICifig|1411691.4.peg.4053

Organism-specific databases

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

More...
EchoBASEi
EB1409

Phylogenomic databases

eggNOGiENOG4105C0R Bacteria
ENOG410XNN3 LUCA
HOGENOMiHOG000112190
InParanoidiP0AEJ0
KOiK03446
PhylomeDBiP0AEJ0

Enzyme and pathway databases

BioCyciEcoCyc:EMRB-MONOMER
ECOL316407:JW2661-MONOMER
MetaCyc:EMRB-MONOMER

Miscellaneous databases

Protein Ontology

More...
PROi
PR:P0AEJ0

Family and domain databases

InterProiView protein in InterPro
IPR004638 EmrB-like
IPR011701 MFS
IPR020846 MFS_dom
IPR036259 MFS_trans_sf
IPR001411 Tet-R_TetB/Drug-R_transptr
PANTHERiPTHR23501 PTHR23501, 1 hit
PfamiView protein in Pfam
PF07690 MFS_1, 1 hit
SUPFAMiSSF103473 SSF103473, 1 hit
TIGRFAMsiTIGR00711 efflux_EmrB, 1 hit
PROSITEiView protein in PROSITE
PS50850 MFS, 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 nameiEMRB_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: P0AEJ0
Secondary accession number(s): P27304, P77725
<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_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyiIntegrated into UniProtKB/Swiss-Prot: December 20, 2005
Last sequence update: December 20, 2005
Last modified: November 13, 2019
This is version 103 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

Complete proteome, Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families
  2. Escherichia coli
    Escherichia coli (strain K12): entries and cross-references to EcoGene
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