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GO:0016987: sigma factor activity (Molecular function)

"Sigma factors act as the promoter specificity subunit of eubacterial and plant plastid multisubunit RNA polymerases, whose core subunit composition is often described as alpha(2)-beta-beta-prime. Although sigma does not bind DNA on its own, when combined with the core to form the holoenzyme, the sigma factor binds specifically to promoter elements. The sigma subunit is released once elongation begins." [GOC:txnOH-2018]


There are 505 sequences with this label.

Enriched clusters
Name Species % in cluster p-value corrected p-value action
Cluster_109 Azolla filiculoides 3.09 % 0.000129 0.00465
Cluster_102 Amborella trichopoda 1.82 % 0.000333 0.004031
Cluster_60 Ceratopteris richardii 1.06 % 0.005094 0.027218
Cluster_127 Ophioglossum reticulatum 0.87 % 0.00252 0.011441
Sequences (505) (download table)

Info: GO-associations disabled for items with more than 300 associated sequences !
InterPro Domains

Family Terms