核内 survivin と PRC2 複合体の相互作用、および H3K27Me3 指向性転写抑制への影響
Adesh D Vaidya1, Alexander J Fezovich1, Sally P Wheatley1
1University of Nottingham, Nottingham, UK.
Abstract:
The PRC2 complex tri-methylates histone 3 at lysine 27 (k27), a post translational modification that induces heterochromatin formation and transcriptional repression. Survivin is a nucleocytoplasmic shuttling protein that is kept out of the nucleus in clement conditions, but that accumulates there in times of stress and in certain specialised cells. While the cytoplasmic functions of survivin are well documented, there is comparatively less understanding of its roles within the nucleus. Here we investigated whether nuclear survivin can affect transcriptional programming. Using interaction analyses and qPCR we report that it binds to the enzymatic subunit of the polycomb repressor complex 2, EZH2 and H3k27Me3, and causes depression of its target genes in a variety of human cells.
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Transcription
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
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