The transcriptional code of human IFN-β gene expression

被引:83
作者
Ford, Ethan [1 ]
Thanos, Dimitris [1 ]
机构
[1] Acad Athens, Inst Mol Biol Genet & Biotechnol, Biomed Res Fdn, Athens 11527, Greece
来源
BIOCHIMICA ET BIOPHYSICA ACTA-GENE REGULATORY MECHANISMS | 2010年 / 1799卷 / 3-4期
关键词
Chromatin; Transcription; Enhanceosome; Interferon-beta; NF-kappa B; IRF-3; NF-KAPPA-B; RNA-POLYMERASE-II; CRYSTAL-STRUCTURE; VIRUS INDUCTION; DNA-BINDING; HMG I(Y); COOPERATIVE BINDING; HISTONE VARIANTS; NUCLEAR FACTOR; ACTIVE GENES;
D O I
10.1016/j.bbagrm.2010.01.010
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
070307 [化学生物学]; 071010 [生物化学与分子生物学];
摘要
Activation of interferon-beta transcription is a highly ordered process beginning with the delivery of NF-kappa B to the IFN-beta enhancer through a process involving stochastic interchromosomal interactions between the IFN-beta enhancer and specialized Alu elements. NF-kappa B delivery is followed by the binding of ATF-2/c-Jun and IRF proteins in a highly cooperative fashion. The assembled "enhanceosome" then recruits PCAF/GCN5 which acetylates the histone tails of the adjacent nucleosomes. The transcriptional coactivator CBP, which binds in a complex with the RNA polymerase II holoenzyme is recruited by the enhanceosome replacing PCAF/GCN5. Next, SWI/SNF, which is part of the holoenzyme complex, induces a conformational change in a nucleosome positioned over the transcriptional start site allowing TFIID to bind, which promotes the sliding of this nucleosome to a new downstream position. At this point the full pre-initiation complex is assembled and transcription commences. This detailed picture of the IFN-beta transcription program gathered through years of rigorous studies, now serves as a paradigm for understanding complex transcriptional switches in eukaryotic systems. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码:328 / 336
页数:9
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