期刊
VIROLOGY
卷 512, 期 -, 页码 25-33出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.virol.2017.09.001
关键词
CTCF; Cohesin; NIPBL; Chromatin; KSHV; Herpesvirus; Polycomb proteins; Viral latency; de novo infection; Lytic gene expression
类别
资金
- NIH [R21AI119597, R03DE025562]
- Cornelia de Lange Syndrome Foundation
Establishment of Kaposi's sarcoma-associated herpesvirus (KSHV) latency following infection is a multistep process, during which polycomb proteins are recruited onto the KSHV genome, which is crucial for the genome-wide repression of lyric genes during latency. Strikingly, only a subset of lytic genes are expressed transiently in the early phase of infection prior to the binding of polycomb proteins onto the KSHV genome, which raises the question what restricts lyric gene expression in the first hours of infection. Here, we demonstrate that both CTCF and cohesin chromatin organizing factors are rapidly recruited to the viral genome prior to the binding of polycombs during de novo infection, but only cohesin is required for the genome-wide inhibition of lyric genes. We propose that cohesin is required for the establishment of KSHV latency by initiating the repression of lyric genes following infection, which is an essential step in persistent infection of humans.
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