What does sigma factor mean?
Definitions for sigma factor
sig·ma fac·tor
This dictionary definitions page includes all the possible meanings, example usage and translations of the word sigma factor.
Wikidata
Sigma factor
A sigma 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 consists 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.
U.S. National Library of Medicine
Sigma Factor
A protein which is a subunit of RNA polymerase. It effects initiation of specific RNA chains from DNA.
Numerology
Chaldean Numerology
The numerical value of sigma factor in Chaldean Numerology is: 1
Pythagorean Numerology
The numerical value of sigma factor in Pythagorean Numerology is: 4
Translations for sigma factor
From our Multilingual Translation Dictionary
- σ因子Chinese
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"sigma factor." Definitions.net. STANDS4 LLC, 2024. Web. 8 Jun 2024. <https://www.definitions.net/definition/sigma+factor>.
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