Sharing the SAGA.
Fiche publication
Date publication
septembre 2017
Journal
Trends in biochemical sciences
Auteurs
Membres identifiés du Cancéropôle Est :
Dr TORA Laszlo
Tous les auteurs :
Helmlinger D, Tora L
Lien Pubmed
Résumé
Transcription initiation is a major regulatory step in eukaryotic gene expression. Co-activators establish transcriptionally competent promoter architectures and chromatin signatures to allow the formation of the pre-initiation complex (PIC), comprising RNA polymerase II (Pol II) and general transcription factors (GTFs). Many GTFs and co-activators are multisubunit complexes, in which individual components are organized into functional modules carrying specific activities. Recent advances in affinity purification and mass spectrometry analyses have revealed that these complexes often share functional modules, rather than containing unique components. This observation appears remarkably prevalent for chromatin-modifying and remodeling complexes. Here, we use the modular organization of the evolutionary conserved Spt-Ada-Gcn5 acetyltransferase (SAGA) complex as a paradigm to illustrate how co-activators share and combine a relatively limited set of functional tools.
Mots clés
assembly, chromatin, functional module, multisubunit complex, protein–protein interaction, transcription
Référence
Trends Biochem. Sci.. 2017 Sep;: