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Entry version 91 (02 Jun 2021)
Sequence version 1 (22 Nov 2005)
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Protein

Toxic protein HokC

Gene

hokC

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

Toxic component of a type I toxin-antitoxin (TA) system. When overexpressed kills cells within minutes; causes collapse of the transmembrane potential and arrest of respiration (PubMed:10361310).

Its toxic effect is probably neutralized by antisense antitoxin RNA SokC (PubMed:10361310).

1 Publication1 Publication

Miscellaneous

Interrupted by an IS186 element, which silences the locus in strain K12 MG1655.1 Publication

<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 processToxin-antitoxin system

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

More...
BioCyci
EcoCyc:MONOMER0-1564

Protein family/group databases

Transport Classification Database

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TCDBi
1.E.53.1.1, the toxic hok/gef protein (hok/gef) family

<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:
Toxic protein HokC
Alternative name(s):
Protein Gef
<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:hokC1 Publication
Synonyms:gef1 Publication
Ordered Locus Names:b4412, JW5002
ORF Names:b0018.1
<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 lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesEnterobacteriaceaeEscherichia
<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 – 5Cytoplasmic1 Publication5
<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>Transmembranei6 – 24Helical; Signal-anchor for type II membrane proteinCuratedAdd BLAST19
Topological domaini25 – 50Periplasmic1 PublicationAdd BLAST26

Keywords - Cellular componenti

Cell inner membrane, Cell membrane, Membrane

<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi

Mutagenesis

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/manual/pathology%5Fand%5Fbiotech%5Fsection">'Pathology and Biotech'</a> section describes the effect of the experimental mutation of one or more amino acid(s) on the biological properties of the protein.<p><a href='/help/mutagen' target='_top'>More...</a></p>Mutagenesisi15C → S: No action on toxicity. 1 Publication1
Mutagenesisi25T → K: Non-toxic. 1 Publication1
Mutagenesisi29L → P: Non-toxic. 1 Publication1
Mutagenesisi30C → S: Prevents dimer formation. 1 Publication1
Mutagenesisi41V → A: Non-toxic. 1 Publication1
Mutagenesisi49S → E: Non-toxic. 1 Publication1

<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_00001990311 – 50Toxic protein HokCAdd BLAST50

Keywords - PTMi

Disulfide bond

Proteomic databases

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

More...
PaxDbi
P0ACG4

PRoteomics IDEntifications database

More...
PRIDEi
P0ACG4

<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%5Fsection">'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%5Fsection">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Homodimer; disulfide-linked.

1 Publication

Protein-protein interaction databases

The Biological General Repository for Interaction Datasets (BioGRID)

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BioGRIDi
4259470, 3 interactors

STRING: functional protein association networks

More...
STRINGi
511145.b4412

<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

<p>This subsection of the 'Family and domains' section provides general information on the biological role of a domain. The term 'domain' is intended here in its wide acceptation, it may be a structural domain, a transmembrane region or a functional domain. Several domains are described in this subsection.<p><a href='/help/domain_cc' target='_top'>More...</a></p>Domaini

The periplasmic portion confers toxicity; dimerization is not required for toxicity.1 Publication

<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

Belongs to the Hok/Gef family.Curated

Keywords - Domaini

Signal-anchor, Transmembrane, Transmembrane helix

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
ENOG50339S1, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_177638_2_0_6

Database for complete collections of gene phylogenies

More...
PhylomeDBi
P0ACG4

Family and domain databases

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR000021, Hok/gef_toxin
IPR018084, Hok/gef_toxin_CS

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF01848, HOK_GEF, 1 hit

Protein Motif fingerprint database; a protein domain database

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PRINTSi
PR00281, HOKGEFTOXIC

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00556, HOK_GEF, 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.

P0ACG4-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MKQHKAMIVA LIVICITAVV AALVTRKDLC EVHIRTGQTE VAVFTAYESE
Length:50
Mass (Da):5,502
Last modified:November 22, 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:i9EC371A1043F682D
GO

Sequence databases

Select the link destinations:

EMBL nucleotide sequence database

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EMBLi

GenBank nucleotide sequence database

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GenBanki

DNA Data Bank of Japan; a nucleotide sequence database

More...
DDBJi
Links Updated
X17311 Genomic DNA Translation: CAB37348.1
U00096 Genomic DNA Translation: AAT48122.1
AP009048 Genomic DNA Translation: BAE76031.1

NCBI Reference Sequences

More...
RefSeqi
WP_000809168.1, NZ_LN832404.1
YP_025292.1, NC_000913.3

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
AAT48122; AAT48122; b4412
BAE76031; BAE76031; BAE76031

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
2847744
56812745

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
ecj:JW5002
eco:b4412

Pathosystems Resource Integration Center (PATRIC)

More...
PATRICi
fig|511145.12.peg.15

<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
X17311 Genomic DNA Translation: CAB37348.1
U00096 Genomic DNA Translation: AAT48122.1
AP009048 Genomic DNA Translation: BAE76031.1
RefSeqiWP_000809168.1, NZ_LN832404.1
YP_025292.1, NC_000913.3

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

BioGRIDi4259470, 3 interactors
STRINGi511145.b4412

Protein family/group databases

TCDBi1.E.53.1.1, the toxic hok/gef protein (hok/gef) family

Proteomic databases

PaxDbiP0ACG4
PRIDEiP0ACG4

Genome annotation databases

EnsemblBacteriaiAAT48122; AAT48122; b4412
BAE76031; BAE76031; BAE76031
GeneIDi2847744
56812745
KEGGiecj:JW5002
eco:b4412
PATRICifig|511145.12.peg.15

Organism-specific databases

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

More...
EchoBASEi
EB0368

Phylogenomic databases

eggNOGiENOG50339S1, Bacteria
HOGENOMiCLU_177638_2_0_6
PhylomeDBiP0ACG4

Enzyme and pathway databases

BioCyciEcoCyc:MONOMER0-1564

Miscellaneous databases

Protein Ontology

More...
PROi
PR:P0ACG4

Family and domain databases

InterProiView protein in InterPro
IPR000021, Hok/gef_toxin
IPR018084, Hok/gef_toxin_CS
PfamiView protein in Pfam
PF01848, HOK_GEF, 1 hit
PRINTSiPR00281, HOKGEFTOXIC
PROSITEiView protein in PROSITE
PS00556, HOK_GEF, 1 hit

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 nameiHOKC_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: P0ACG4
Secondary accession number(s): P22982, P75618, Q2MCH5
<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: November 22, 2005
Last sequence update: November 22, 2005
Last modified: June 2, 2021
This is version 91 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

Reference proteome

Documents

  1. SIMILARITY comments
    Index of protein domains and families
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