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Entry version 111 (02 Jun 2021)
Sequence version 1 (01 Mar 2005)
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Protein

RNA polymerase sigma factor SigA

Gene

sigA

Organism
Staphylococcus aureus (strain NCTC 8325 / PS 47)
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

Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released. This sigma factor is the primary sigma factor during exponential growth.

UniRule annotation1 Publication

Regions

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the <a href="http://www.uniprot.org/help/function_section">Function</a> 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 bindingi329 – 348H-T-H motifUniRule 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

GO - Biological processi

<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, Sigma factor
Biological processTranscription, Transcription regulation

<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:
RNA polymerase sigma factor SigAUniRule annotation
<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:sigAUniRule annotation
Synonyms:plaC, rpoD
Ordered Locus Names:SAOUHSC_01662
<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>OrganismiStaphylococcus aureus (strain NCTC 8325 / PS 47)
<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 identifieri93061 [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 lineageiBacteriaFirmicutesBacilliBacillalesStaphylococcaceaeStaphylococcus
<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
  • UP000008816 <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 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

Keywords - Cellular componenti

Cytoplasm

<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_00000939161 – 368RNA polymerase sigma factor SigAAdd BLAST368

<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

Interacts transiently with the RNA polymerase catalytic core formed by RpoA, RpoB, RpoC and RpoZ (2 alpha, 1 beta, 1 beta' and 1 omega subunit) to form the RNA polymerase holoenzyme that can initiate transcription (By similarity).

Interacts (via sigma-70 factor domain 4) with the phage G1 protein gp67; this inhibits rRNA synthesis. Interaction with phage G1 protein gp67 does not inhibit transcription in general, but selectively inhibits transcription from promoters that require interaction of the RNA polymerase alpha subunit with DNA sequences upstream of the -35 promoter element.

UniRule annotation1 Publication

Protein-protein interaction databases

STRING: functional protein association networks

More...
STRINGi
1280.SAXN108_1583

<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

1368
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
P0A0J0

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

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni16 – 90Sigma-70 factor domain-1Add BLAST75
Regioni69 – 90DisorderedSequence analysisAdd BLAST22
Regioni135 – 205Sigma-70 factor domain-2Add BLAST71
Regioni214 – 291Sigma-70 factor domain-3Add BLAST78
Regioni303 – 356Sigma-70 factor domain-4Add BLAST54

Motif

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Family and Domains' section describes a short (usually not more than 20 amino acids) conserved sequence motif of biological significance.<p><a href='/help/motif' target='_top'>More...</a></p>Motifi159 – 162Interaction with polymerase core subunit RpoC4

<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

In the autoinhibited state, sigma-70 factor domain-1 packs closely together with sigma-70 factor domains-2 and -4, contrary to the extended conformation that is seen when the protein is part of the RNA polymerase holoenzyme.By similarity
The sigma-70 factor domain-2 mediates sequence-specific interaction with the -10 element in promoter DNA, and plays an important role in melting the double-stranded DNA and the formation of the transcription bubble. The sigma-70 factor domain-2 mediates interaction with the RNA polymerase subunits RpoB and RpoC (By similarity).By similarity
The sigma-70 factor domain-4 contains a helix-turn-helix (H-T-H) motif that mediates interaction with the -35 element in promoter DNA. The domain also mediates interaction with the RNA polymerase subunit RpoA. Interactions between sigma-70 factor domain-4 and anti-sigma factors prevents interaction of sigma factors with the RNA polymerase catalytic core (By similarity).By similarity

<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 sigma-70 factor family. RpoD/SigA subfamily.UniRule annotation

Phylogenomic databases

evolutionary genealogy of genes: Non-supervised Orthologous Groups

More...
eggNOGi
COG0568, Bacteria

The HOGENOM Database of Homologous Genes from Fully Sequenced Organisms

More...
HOGENOMi
CLU_014793_3_3_9

Identification of Orthologs from Complete Genome Data

More...
OMAi
YQRWLAE

Family and domain databases

Gene3D Structural and Functional Annotation of Protein Families

More...
Gene3Di
1.10.10.10, 2 hits
1.10.220.120, 1 hit

HAMAP database of protein families

More...
HAMAPi
MF_00963, Sigma70_RpoD_SigA, 1 hit

Integrated resource of protein families, domains and functional sites

More...
InterProi
View protein in InterPro
IPR014284, RNA_pol_sigma-70_dom
IPR000943, RNA_pol_sigma70
IPR009042, RNA_pol_sigma70_r1_2
IPR007627, RNA_pol_sigma70_r2
IPR007624, RNA_pol_sigma70_r3
IPR007630, RNA_pol_sigma70_r4
IPR007127, RNA_pol_sigma_70_r1_1
IPR042189, RNA_pol_sigma_70_r1_1_sf
IPR013325, RNA_pol_sigma_r2
IPR013324, RNA_pol_sigma_r3/r4-like
IPR012760, RNA_pol_sigma_RpoD_C
IPR028630, Sigma70_RpoD
IPR036388, WH-like_DNA-bd_sf

Pfam protein domain database

More...
Pfami
View protein in Pfam
PF03979, Sigma70_r1_1, 1 hit
PF00140, Sigma70_r1_2, 1 hit
PF04542, Sigma70_r2, 1 hit
PF04539, Sigma70_r3, 1 hit
PF04545, Sigma70_r4, 1 hit

Protein Motif fingerprint database; a protein domain database

More...
PRINTSi
PR00046, SIGMA70FCT

Superfamily database of structural and functional annotation

More...
SUPFAMi
SSF88659, SSF88659, 2 hits
SSF88946, SSF88946, 1 hit

TIGRFAMs; a protein family database

More...
TIGRFAMsi
TIGR02393, RpoD_Cterm, 1 hit
TIGR02937, sigma70-ECF, 1 hit

PROSITE; a protein domain and family database

More...
PROSITEi
View protein in PROSITE
PS00715, SIGMA70_1, 1 hit
PS00716, SIGMA70_2, 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.

P0A0J0-1 [UniParc]FASTAAdd to basket
« Hide
        10         20         30         40         50
MSDNTVKIKK QTIDPTLTLE DVKKQLIEKG KKEGHLSHEE IAEKLQNFDI
60 70 80 90 100
DSDQMDDFFD QLNDNDISLV NEKDSSDTDE KLNPSDLSAP PGVKINDPVR
110 120 130 140 150
MYLKEIGRVN LLSAQEEIEL AKRIEQGDEV AKSRLAEANL RLVVSIAKRY
160 170 180 190 200
VGRGMLFLDL IQEGNMGLIK AVEKFDFNKG FKFSTYATWW IRQAITRAIA
210 220 230 240 250
DQARTIRIPV HMVETINKLI RVQRQLLQDL GRDPAPEEIG EEMDLPAEKV
260 270 280 290 300
REILKIAQEP VSLETPIGEE DDSHLGDFIE DQEAQSPSDH AAYELLKEQL
310 320 330 340 350
EDVLDTLTDR EENVLRLRFG LDDGRTRTLE EVGKVFGVTR ERIRQIEAKA
360
LRKLRHPSRS KRLKDFMD
Length:368
Mass (Da):42,171
Last modified:March 1, 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:iAB029CA4F5A93A55
GO

Natural variant

Feature keyPosition(s)DescriptionActionsGraphical viewLength
<p>This subsection of the 'Sequence' section describes natural variant(s) of the protein sequence.<p><a href='/help/variant' target='_top'>More...</a></p>Natural varianti209P → S in plaC1 mutation; results in a narrower specificity for promoters. 1

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
M63177 Genomic DNA Translation: AAB59090.1
CP000253 Genomic DNA Translation: ABD30737.1

Protein sequence database of the Protein Information Resource

More...
PIRi
S34442

NCBI Reference Sequences

More...
RefSeqi
WP_001283055.1, NZ_LS483365.1
YP_500173.1, NC_007795.1

Genome annotation databases

Ensembl bacterial and archaeal genome annotation project

More...
EnsemblBacteriai
ABD30737; ABD30737; SAOUHSC_01662

Database of genes from NCBI RefSeq genomes

More...
GeneIDi
3920074
58067415

KEGG: Kyoto Encyclopedia of Genes and Genomes

More...
KEGGi
sao:SAOUHSC_01662

Pathosystems Resource Integration Center (PATRIC)

More...
PATRICi
fig|93061.5.peg.1512

<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
M63177 Genomic DNA Translation: AAB59090.1
CP000253 Genomic DNA Translation: ABD30737.1
PIRiS34442
RefSeqiWP_001283055.1, NZ_LS483365.1
YP_500173.1, NC_007795.1

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
4G6DX-ray2.00A297-368[»]
4G8XX-ray3.00A/C297-357[»]
4G94X-ray2.00A297-357[»]
SMRiP0A0J0
ModBaseiSearch...
PDBe-KBiSearch...

Protein-protein interaction databases

STRINGi1280.SAXN108_1583

Genome annotation databases

EnsemblBacteriaiABD30737; ABD30737; SAOUHSC_01662
GeneIDi3920074
58067415
KEGGisao:SAOUHSC_01662
PATRICifig|93061.5.peg.1512

Phylogenomic databases

eggNOGiCOG0568, Bacteria
HOGENOMiCLU_014793_3_3_9
OMAiYQRWLAE

Miscellaneous databases

Protein Ontology

More...
PROi
PR:P0A0J0

Family and domain databases

Gene3Di1.10.10.10, 2 hits
1.10.220.120, 1 hit
HAMAPiMF_00963, Sigma70_RpoD_SigA, 1 hit
InterProiView protein in InterPro
IPR014284, RNA_pol_sigma-70_dom
IPR000943, RNA_pol_sigma70
IPR009042, RNA_pol_sigma70_r1_2
IPR007627, RNA_pol_sigma70_r2
IPR007624, RNA_pol_sigma70_r3
IPR007630, RNA_pol_sigma70_r4
IPR007127, RNA_pol_sigma_70_r1_1
IPR042189, RNA_pol_sigma_70_r1_1_sf
IPR013325, RNA_pol_sigma_r2
IPR013324, RNA_pol_sigma_r3/r4-like
IPR012760, RNA_pol_sigma_RpoD_C
IPR028630, Sigma70_RpoD
IPR036388, WH-like_DNA-bd_sf
PfamiView protein in Pfam
PF03979, Sigma70_r1_1, 1 hit
PF00140, Sigma70_r1_2, 1 hit
PF04542, Sigma70_r2, 1 hit
PF04539, Sigma70_r3, 1 hit
PF04545, Sigma70_r4, 1 hit
PRINTSiPR00046, SIGMA70FCT
SUPFAMiSSF88659, SSF88659, 2 hits
SSF88946, SSF88946, 1 hit
TIGRFAMsiTIGR02393, RpoD_Cterm, 1 hit
TIGR02937, sigma70-ECF, 1 hit
PROSITEiView protein in PROSITE
PS00715, SIGMA70_1, 1 hit
PS00716, SIGMA70_2, 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 nameiSIGA_STAA8
<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: P0A0J0
Secondary accession number(s): P26766, Q2FY12
<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: March 1, 2005
Last sequence update: March 1, 2005
Last modified: June 2, 2021
This is version 111 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
  2. SIMILARITY comments
    Index of protein domains and families
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