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Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
The VP16 activation domain establishes an active mediator lacking CDK8 in vivo.
J. Biol. Chem. 282, 2163-2173 (2007)
VP16 has been widely used to unravel the mechanisms underlying gene transcription. Much of the previous work has been conducted in reconstituted in vitro systems. Here we study the formation of transcription complexes at stable reporters under the control of an inducible Tet-VP16 activator in living cells. In this simplified model for gene activation VP16 recruits the general factors and the cofactors Mediator, GCN5, CBP, and PC4, within minutes to the promoter region. Activation is accompanied by only minor changes in histone acetylation and H3K4 methylation but induces a marked promoter-specific increase in H3K79 methylation. Mediated through contacts with VP16 several subunits of the cleavage and polyadenylation factor (CPSF/CstF) are concentrated at the promoter region. We provide in vitro and in vivo evidence that VP16 activates transcription through a specific MED25-associated Mediator, which is deficient in CDK8.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
ISSN (print) / ISBN
0021-9258
e-ISSN
1083-351X
Zeitschrift
Journal of Biological Chemistry, The
Quellenangaben
Band: 282,
Seiten: 2163-2173
Verlag
American Society for Biochemistry and Molecular Biology
Nichtpatentliteratur
Publikationen
Begutachtungsstatus
Peer reviewed
Institut(e)
Institute of Molecular Immunology (IMI)