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- Q306436 subject Q7216294.
- Q306436 abstract "A sigma factor (σ factor) is a protein needed only for initiation of RNA synthesis. It is a bacterial transcription initiation factor that enables specific binding of RNA polymerase to gene promoters. The specific sigma factor used to initiate transcription of a given gene will vary, depending on the gene and on the environmental signals needed to initiate transcription of that gene.Every molecule of RNA polymerase holoenzyme contains exactly one sigma factor subunit, which in the model bacterium Escherichia coli is one of those listed below. The number of sigma factors varies between bacterial species. E. coli has seven sigma factors. Sigma factors are distinguished by their characteristic molecular weights. For example, σ70 refers to the sigma factor with a molecular weight of 70 kDa.RNA polymerase holoenzyme complex consisting of core RNA polymerase and a sigma factor executes transcription of a DNA template strand. Once initiation of RNA transcription is complete, the sigma factor can leave the complex.".
- Q306436 symbol "Sigma70_r1_1".
- Q306436 symbol "Sigma70_r1_2".
- Q306436 symbol "Sigma70_r2".
- Q306436 symbol "Sigma70_r3".
- Q306436 symbol "Sigma70_r4".
- Q306436 symbol "Sigma70_r4_2".
- Q306436 thumbnail PDB_1ku2_EBI.jpg?width=300.
- Q306436 wikiPageWikiLink Q10876.
- Q306436 wikiPageWikiLink Q1264018.
- Q306436 wikiPageWikiLink Q1295754.
- Q306436 wikiPageWikiLink Q177900.
- Q306436 wikiPageWikiLink Q18391363.
- Q306436 wikiPageWikiLink Q18391366.
- Q306436 wikiPageWikiLink Q212410.
- Q306436 wikiPageWikiLink Q224093.
- Q306436 wikiPageWikiLink Q25419.
- Q306436 wikiPageWikiLink Q272631.
- Q306436 wikiPageWikiLink Q367473.
- Q306436 wikiPageWikiLink Q422496.
- Q306436 wikiPageWikiLink Q4774459.
- Q306436 wikiPageWikiLink Q483261.
- Q306436 wikiPageWikiLink Q7216294.
- Q306436 wikiPageWikiLink Q7326144.
- Q306436 wikiPageWikiLink Q7375543.
- Q306436 wikiPageWikiLink Q8047.
- Q306436 symbol "Sigma70_r1_1".
- Q306436 symbol "Sigma70_r1_2".
- Q306436 symbol "Sigma70_r2".
- Q306436 symbol "Sigma70_r3".
- Q306436 symbol "Sigma70_r4".
- Q306436 symbol "Sigma70_r4_2".
- Q306436 type Biomolecule.
- Q306436 type Protein.
- Q306436 type Thing.
- Q306436 type Q206229.
- Q306436 type Q8054.
- Q306436 comment "A sigma factor (σ factor) is a protein needed only for initiation of RNA synthesis. It is a bacterial transcription initiation factor that enables specific binding of RNA polymerase to gene promoters.".
- Q306436 label "Sigma factor".
- Q306436 depiction PDB_1ku2_EBI.jpg.