Functional interplay between TFIIH and KAT2A regulates higher-order chromatin structure and class II gene expression

Jérémy Sandoz, Zita Nagy, Philippe Catez, Gizem Caliskan, Sylvain Geny, Jean-Baptiste Renaud, Jean-Paul Concordet, Arnaud Poterszman, Laszlo Tora, Jean-Marc Egly, Nicolas May and Frédéric Coin ()
Additional contact information
Jérémy Sandoz: Institut de Génétique et de Biologie Moléculaire et Cellulaire Illkirch Cedex
Zita Nagy: Institut de Génétique et de Biologie Moléculaire et Cellulaire Illkirch Cedex
Philippe Catez: Institut de Génétique et de Biologie Moléculaire et Cellulaire Illkirch Cedex
Gizem Caliskan: Institut de Génétique et de Biologie Moléculaire et Cellulaire Illkirch Cedex
Sylvain Geny: INSERM U1154, CNRS UMR7196, Muséum national d’Histoire naturelle
Jean-Baptiste Renaud: INSERM U1154, CNRS UMR7196, Muséum national d’Histoire naturelle
Jean-Paul Concordet: INSERM U1154, CNRS UMR7196, Muséum national d’Histoire naturelle
Arnaud Poterszman: Institut de Génétique et de Biologie Moléculaire et Cellulaire Illkirch Cedex
Laszlo Tora: Institut de Génétique et de Biologie Moléculaire et Cellulaire Illkirch Cedex
Jean-Marc Egly: Institut de Génétique et de Biologie Moléculaire et Cellulaire Illkirch Cedex
Nicolas May: Institut de Génétique et de Biologie Moléculaire et Cellulaire Illkirch Cedex
Frédéric Coin: Institut de Génétique et de Biologie Moléculaire et Cellulaire Illkirch Cedex

Nature Communications, 2019, vol. 10, issue 1, 1-14

Abstract: Abstract The TFIIH subunit XPB is involved in combined Xeroderma Pigmentosum and Cockayne syndrome (XP-B/CS). Our analyses reveal that XPB interacts functionally with KAT2A, a histone acetyltransferase (HAT) that belongs to the hSAGA and hATAC complexes. XPB interacts with KAT2A-containing complexes on chromatin and an XP-B/CS mutation specifically elicits KAT2A-mediated large-scale chromatin decondensation. In XP-B/CS cells, the abnormal recruitment of TFIIH and KAT2A to chromatin causes inappropriate acetylation of histone H3K9, leading to aberrant formation of transcription initiation complexes on the promoters of several hundred genes and their subsequent overexpression. Significantly, this cascade of events is similarly sensitive to KAT2A HAT inhibition or to the rescue with wild-type XPB. In agreement, the XP-B/CS mutation increases KAT2A HAT activity in vitro. Our results unveil a tight connection between TFIIH and KAT2A that controls higher-order chromatin structure and gene expression and provide new insights into transcriptional misregulation in a cancer-prone DNA repair-deficient disorder.

Date: 2019
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DOI: 10.1038/s41467-019-09270-2

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