A mechanism for epigenetic control of DNA replication.

A mechanism for epigenetic control of DNA replication.
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DOI:
10.1101/gad.306464.117
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发表时间:
2018-02-01
影响因子:
10.5
通讯作者:
Sansam CL
Sansam CL
中科院分区:
生物学1区
文献类型:
--
作者:
Sansam CG;Pietrzak K;Majchrzycka B;Kerlin MA;Chen J;Rankin S;Sansam CL

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TICRR/TRESLIN is an essential protein required for the initiation of DNA replication. Here, Sansam et al. report that TICRR physically interacts with the acetyl-histone binding bromodomain and extraterminal (BET) proteins BRD2 and BRD4. Abrogation of this interaction impairs TICRR binding to acetylated chromatin and disrupts the spatiotemporal order of DNA replication. DNA replication origins in hyperacetylated euchromatin fire preferentially during early S phase. However, how acetylation controls DNA replication timing is unknown. TICRR/TRESLIN is an essential protein required for the initiation of DNA replication. Here, we report that TICRR physically interacts with the acetyl-histone binding bromodomain (BRD) and extraterminal (BET) proteins BRD2 and BRD4. Abrogation of this interaction impairs TICRR binding to acetylated chromatin and disrupts normal S-phase progression. Our data reveal a novel function for BET proteins and establish the TICRR–BET interaction as a potential mechanism for epigenetic control of DNA replication.
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