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GO Related Resource Count : 49,239

GO Term Detail GO ID: GO:0016987

Term Information
Category molecular_function
Name sigma factor activity
Synonyms sigma transcription factor
Definition A sigma factor is the promoter specificity subunit of eubacterial-type multisubunit RNA polymerases, those whose core subunit composition is often described as alpha(2)-beta-beta-prime. (This type of multisubunit RNA polymerase complex is known to be found in eubacteria and plant plastids). Although sigma does not bind DNA on its own, when combined with the core to form the holoenzyme, this binds specifically to promoter sequences, with the sigma factor making sequence specific contacts with the promoter elements. The sigma subunit is released from the elongating form of the polymerase and is thus free to act catalytically for multiple RNA polymerase core enzymes.
Term Comment
AmiGO 2 GO:0016987
Associated Resources
Organism Species Resources Count
Associated with this GO Term directly / Associated with this GO Term and this descendants
Prokaryotes (E. coli) 35 / 35
Tree View
At 'A / B resources (genes)' of the tree view, 'A' is a number of resources (genes) associated with this GO Term directly.'B' is the sum of resources (genes) associated with this GO Term and its descendants. If 'B' is bigger, it might take a lot of time to display the link of 'B'.

In "Associated GO Gene Product List", it show gene products associated with this GO Term directly.
Please click here if you want to show gene products associated with this GO Term and its descendants in "Associated GO Gene Product List". (It might take a lot of time to display.) Change List

163,018 items 1 - 20 / 163018
Related Gene Product List
Symbol Ascending Order Full name Species Data source Evidence
1 Gp1 Sphingomonas phage PAU InterPro IEA
103 Uncharacterized protein Halovirus HCTV-1 InterPro IEA
103 Uncharacterized protein Halovirus HCTV-5 InterPro IEA
103R Uncharacterized protein Invertebrate iridovirus 22 InterPro IEA
1075 RNA polymerase sigma factor 54 Moorella glycerini InterPro IEA
1076 RNA polymerase sigma factor 54 Moorella glycerini InterPro IEA
108 Uncharacterized protein Halovirus HVTV-1 InterPro IEA
109R Uncharacterized protein Invertebrate iridescent virus 22 InterPro IEA
112R Uncharacterized protein Invertebrate iridovirus 25 InterPro IEA
12 Gp12 Streptomyces phage phiC31 InterPro IEA
12 Gp12 Streptomyces phage phiBT1 InterPro IEA
1285 RNA polymerase sigma factor, region 3/4 Syntrophomonas zehnderi OL-4 InterPro IEA
1354 RNA polymerase sigma-I type Moorella glycerini InterPro IEA
UniProt IEA
1362 RNA polymerase sigma-B/F/G type Syntrophomonas zehnderi OL-4 InterPro IEA
UniProt IEA
137 RNA polymerase sigma factor Moorella glycerini InterPro IEA
UniProt IEA
1546 RNA polymerase sigma factor Moorella glycerini InterPro IEA
UniProt IEA
1554 RNA polymerase sigma factor Syntrophomonas zehnderi OL-4 InterPro IEA
UniProt IEA
1555 RNA polymerase sigma factor Syntrophomonas zehnderi OL-4 InterPro IEA
UniProt IEA
1599 RNA polymerase sigma factor, FliA/WhiG Syntrophomonas zehnderi OL-4 InterPro IEA
UniProt IEA
16-3p086 p086 Rhizobium phage 16-3 InterPro IEA
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