TY - JOUR A1 - Eckert, Dawid A1 - Buhl, Sandra A1 - Weber, Susanne A1 - Jäger, Richard A1 - Schorle, Hubert T1 - The AP-2 family of transcription factors T2 - Genome Biol. (Genome Biology) N2 - The AP-2 family of transcription factors consists of five different proteins in humans and mice: AP-2alpha, AP-2beta, AP-2gamma, AP-2delta and AP-2epsilon. Frogs and fish have known orthologs of some but not all of these proteins, and homologs of the family are also found in protochordates, insects and nematodes. The proteins have a characteristic helix-span-helix motif at the carboxyl terminus, which, together with a central basic region, mediates dimerization and DNA binding. The amino terminus contains the transactivation domain. AP-2 proteins are first expressed in primitive ectoderm of invertebrates and vertebrates; in vertebrates, they are also expressed in the emerging neural-crest cells, and AP-2alpha-/- animals have impairments in neural-crest-derived facial structures. AP-2beta is indispensable for kidney development and AP-2gamma is necessary for the formation of trophectoderm cells shortly after implantation; AP-2alpha and AP-2gamma levels are elevated in human mammary carcinoma and seminoma. The general functions of the family appear to be the cell-type-specific stimulation of proliferation and the suppression of terminal differentiation during embryonic development. Y1 - 2005 UR - https://pub.h-brs.de/frontdoor/index/index/docId/3749 SN - 1474-760X VL - 6 IS - 13 SP - 246 PB - BioMed Central ER -