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表观遗传学和染色质结构在疟原虫转录调控中的作用。

The role of epigenetics and chromatin structure in transcriptional regulation in malaria parasites.

机构信息

Department of Molecular, Cell and Systems Biology, University of California Riverside, Riverside, CA, USA.

出版信息

Brief Funct Genomics. 2019 Sep 24;18(5):302-313. doi: 10.1093/bfgp/elz005.

Abstract

Due to the unique selective pressures and extreme changes faced by the human malaria parasite Plasmodium falciparum throughout its life cycle, the parasite has evolved distinct features to alter its gene expression patterns. Along with classical gene regulation by transcription factors (TFs), of which only one family, the AP2 TFs, has been described in the parasite genome, a large body of evidence points toward chromatin structure and epigenetic factors mediating the changes in gene expression associated with parasite life cycle stages. These attributes may be critically important for immune evasion, host cell invasion and development of the parasite in its two hosts, the human and the Anopheles vector. Thus, the factors involved in the maintenance and regulation of chromatin and epigenetic features represent potential targets for antimalarial drugs. In this review, we discuss the mechanisms in P. falciparum that regulate chromatin structure, nucleosome landscape, the 3-dimensional structure of the genome and additional distinctive features created by parasite-specific genes and gene families. We review conserved traits of chromatin in eukaryotes in order to highlight what is unique in the parasite.

摘要

由于人类疟原虫(Plasmodium falciparum)在其整个生命周期中面临独特的选择性压力和极端变化,该寄生虫已经进化出独特的特征来改变其基因表达模式。除了转录因子(TFs)的经典基因调控,寄生虫基因组中仅描述了一个 AP2 TF 家族,大量证据表明染色质结构和表观遗传因素介导与寄生虫生命周期阶段相关的基因表达变化。这些特征对于免疫逃避、宿主细胞入侵和寄生虫在其两个宿主——人类和疟蚊媒介中的发育可能至关重要。因此,参与维持和调节染色质和表观遗传特征的因素代表了抗疟药物的潜在靶点。在这篇综述中,我们讨论了调节染色质结构、核小体景观、基因组三维结构以及寄生虫特异性基因和基因家族产生的其他独特特征的机制。我们回顾了真核生物中染色质的保守特征,以突出寄生虫的独特之处。

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