Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
Class of DNA-binding proteins that regulate gene transcription
Activating transcription factor, ATF, is a group of bZIPtranscription factors, which act as homodimers or heterodimers with a range of other bZIP factors. First, they have been described as members of the CREB/ATF family, whereas it turned out later that some of them might be more similar to AP-1-like factors such as c-Jun or c-Fos. In general, ATFs are known to respond to extracellular signals and this suggests an important role that they have in maintaining homeostasis. Some of these ATFs, such as ATF3, ATF4, and ATF6 are known to play a role in stress responses. Another example of ATFs function would be ATFx that can suppress apoptosis.
van Dam H, Castellazzi M (2001). "Distinct roles of Jun : Fos and Jun : ATF dimers in oncogenesis". Oncogene. 20 (19): 2453–64. doi:10.1038/sj.onc.1204239. PMID11402340.
Karin, Michael; Smeal, Tod (1992). "Control of transcription factors by signal transduction pathways: the beginning of the end". Trends Biochem Sci. 17 (10): 418–22. doi:10.1016/0968-0004(92)90012-x. PMID1455510.
Hai, Tsonwin; Hartman, Matthew G. (2001-07-25). "The molecular biology and nomenclature of the activating transcription factor/cAMP responsive element binding family of transcription factors: activating transcription factor proteins and homeostasis". Gene. 273 (1): 1–11. doi:10.1016/S0378-1119(01)00551-0. ISSN0378-1119. PMID11483355.