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Entry version 100 (08 May 2019)
Sequence version 1 (01 Oct 2001)
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Protein

Antitoxin PezA

Gene

pezA

Organism
Streptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4)
Status
Reviewed-Annotation score:

Annotation score:3 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

Antitoxin component of a type II toxin-antitoxin (TA) system. Upon expression in E.coli neutralizes the toxic effect of cognate toxin PezT. Represses transcription of its own operon, PezT acts as a corepressor, considerably increasing repression.2 Publications

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the ‘Function’ section specifies the position and type of each DNA-binding domain present within the protein.<p><a href='/help/dna_bind' target='_top'>More...</a></p>DNA bindingi17 – 36H-T-H motifPROSITE-ProRule annotationAdd BLAST20

<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

<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 functionDNA-binding, Repressor
Biological processToxin-antitoxin system, Transcription, Transcription regulation

Enzyme and pathway databases

BioCyc Collection of Pathway/Genome Databases

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BioCyci
SPNE170187:G1FZB-1079-MONOMER

<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:
Antitoxin PezA
<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:pezA
Ordered Locus Names:SP_1050
<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>OrganismiStreptococcus pneumoniae serotype 4 (strain ATCC BAA-334 / TIGR4)
<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 identifieri170187 [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 lineageiBacteriaFirmicutesBacilliLactobacillalesStreptococcaceaeStreptococcus
<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
  • UP000000585 <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

<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_00004109661 – 158Antitoxin PezAAdd BLAST158

Proteomic databases

PRoteomics IDEntifications database

More...
PRIDEi
Q97QZ2

<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

<p>This subsection of the ‘Expression’ section reports the experimentally proven effects of inducers and repressors (usually chemical compounds or environmental factors) on the level of protein (or mRNA) expression (up-regulation, down-regulation, constitutive expression).<p><a href='/help/induction' target='_top'>More...</a></p>Inductioni

Conflicting data is available; found to be a member of the pezAT operon (upon ectopic expression in E.coli); in S.pneumoniae strain 0100993 is found in a monocistronic operon.

<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

Probably a homodimer, forms a PezA2PezT2 heterotetramer. The heterotetramer is much more stable than either of the proteins alone, and a specific mechanism may be necessary to liberate the toxin.2 Publications

Protein-protein interaction databases

Database of interacting proteins

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DIPi
DIP-58970N

Protein interaction database and analysis system

More...
IntActi
Q97QZ2, 2 interactors

STRING: functional protein association networks

More...
STRINGi
170187.SP_1050

<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

1158
Legend: HelixTurnBeta strandPDB Structure known for this area
Show more details

3D structure databases

Select the link destinations:

Protein Data Bank Europe

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PDBei

Protein Data Bank RCSB

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RCSB PDBi

Protein Data Bank Japan

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PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
2P5TX-ray3.20A/C/E/G1-158[»]

Database of protein disorder

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DisProti
DP00812

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

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SMRi
Q97QZ2

Database of comparative protein structure models

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ModBasei
Search...

MobiDB: a database of protein disorder and mobility annotations

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MobiDBi
Search...

Miscellaneous databases

Relative evolutionary importance of amino acids within a protein sequence

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EvolutionaryTracei
Q97QZ2

<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_and_domains_section">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>Domaini6 – 60HTH cro/C1-typePROSITE-ProRule annotationAdd BLAST55

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

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eggNOGi
COG1396 LUCA

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
HOG000267565

KEGG Orthology (KO)

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KOi
K18830

Identification of Orthologs from Complete Genome Data

More...
OMAi
KEFAMIG

Family and domain databases

Conserved Domains Database

More...
CDDi
cd00093 HTH_XRE, 1 hit

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.10.8.130, 1 hit

Integrated resource of protein families, domains and functional sites

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InterProi
View protein in InterPro
IPR035569 Antitoxin_epsilon/PezA_dom_sf
IPR001387 Cro/C1-type_HTH
IPR010982 Lambda_DNA-bd_dom_sf

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF01381 HTH_3, 1 hit

Simple Modular Architecture Research Tool; a protein domain database

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SMARTi
View protein in SMART
SM00530 HTH_XRE, 1 hit

Superfamily database of structural and functional annotation

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SUPFAMi
SSF47413 SSF47413, 1 hit

PROSITE; a protein domain and family database

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PROSITEi
View protein in PROSITE
PS50943 HTH_CROC1, 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>.<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.

Q97QZ2-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MIGKNIKSLR KTHDLTQLEF ARIVGISRNS LSRYENGTSS VSTELIDIIC
60 70 80 90 100
QKFNVSYVDI VGEDKMLNPV EDYELTLKIE IVKERGANLL SRLYRYQDSQ
110 120 130 140 150
GISIDDESNP WILMSDDLSD LIHTNIYLVE TFDEIERYSG YLDGIERMLE

ISEKRMVA
Length:158
Mass (Da):18,248
Last modified:October 1, 2001 - 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:i0ABB5257446881C5
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

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DDBJi
Links Updated
AE005672 Genomic DNA Translation: AAK75164.1

Protein sequence database of the Protein Information Resource

More...
PIRi
C95121

NCBI Reference Sequences

More...
RefSeqi
WP_000579608.1, NZ_AKVY01000001.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
AAK75164; AAK75164; SP_1050

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
spn:SP_1050

<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
AE005672 Genomic DNA Translation: AAK75164.1
PIRiC95121
RefSeqiWP_000579608.1, NZ_AKVY01000001.1

3D structure databases

Select the link destinations:
PDBei
RCSB PDBi
PDBji
Links Updated
PDB entryMethodResolution (Å)ChainPositionsPDBsum
2P5TX-ray3.20A/C/E/G1-158[»]
DisProtiDP00812
SMRiQ97QZ2
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

DIPiDIP-58970N
IntActiQ97QZ2, 2 interactors
STRINGi170187.SP_1050

Proteomic databases

PRIDEiQ97QZ2

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiAAK75164; AAK75164; SP_1050
KEGGispn:SP_1050

Phylogenomic databases

eggNOGiCOG1396 LUCA
HOGENOMiHOG000267565
KOiK18830
OMAiKEFAMIG

Enzyme and pathway databases

BioCyciSPNE170187:G1FZB-1079-MONOMER

Miscellaneous databases

EvolutionaryTraceiQ97QZ2

Family and domain databases

CDDicd00093 HTH_XRE, 1 hit
Gene3Di1.10.8.130, 1 hit
InterProiView protein in InterPro
IPR035569 Antitoxin_epsilon/PezA_dom_sf
IPR001387 Cro/C1-type_HTH
IPR010982 Lambda_DNA-bd_dom_sf
PfamiView protein in Pfam
PF01381 HTH_3, 1 hit
SMARTiView protein in SMART
SM00530 HTH_XRE, 1 hit
SUPFAMiSSF47413 SSF47413, 1 hit
PROSITEiView protein in PROSITE
PS50943 HTH_CROC1, 1 hit

ProtoNet; Automatic hierarchical classification of proteins

More...
ProtoNeti
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 nameiPEZA_STRPN
<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: Q97QZ2
<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: June 28, 2011
Last sequence update: October 1, 2001
Last modified: May 8, 2019
This is version 100 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, Complete proteome

Documents

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