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Targeting HIV-1 DNA integration by swapping tethers

机译:通过交换绳索靶向HIV-1 DNA整合

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摘要

Retroviruses replicate by integrating a DNA copy of their genome into cellular DNA (1). The integrated DNA is replicated along with cellular DNA during each cell-division cycle and is the template for transcription of RNAs required for production of progeny virus. DNA integration is mediated by the virally encoded in-tegrase enzyme and occurs at essentially any location in the host DNA, but each group of retroviruses exhibits distinct regional preferences (2). For example, HIV-1 and closely related retroviruses called lentiviruses preferentially integrate in active transcription units. The mechanistic basis of the target-site preference of HIV-1 DNA integration is not well understood, but studies suggest that a cellular protein called lens epithelium-derived growth factor (LEDGF) plays a key role (3). LEDGF binds to both HIV-1 integrase and chromatin, and in a popular model, it tethers the viral integration machinery to chromatin (4). In this issue of PNAS, Ferris et al. (5) provide strong support for this model and show that the targeting preference of HIV-1 can be changed simply by swapping the chromatin-binding domain (CBD) of LEDGF.
机译:逆转录病毒通过将其基因组的DNA拷贝整合到细胞DNA中来复制(1)。在每个细胞分裂周期中,整合的DNA与细胞DNA一起复制,并且是产生子代病毒所需的RNA转录的模板。 DNA整合是由病毒编码的整合酶介导的,基本上发生在宿主DNA的任何位置,但是每组逆转录病毒均表现出独特的区域偏好(2)。例如,HIV-1和称为慢病毒的密切相关的逆转录病毒优先整合到活性转录单位中。 HIV-1 DNA整合的靶位偏爱的机制基础尚不十分清楚,但研究表明称为晶状体上皮衍生生长因子(LEDGF)的细胞蛋白起着关键作用(3)。 LEDGF与HIV-1整合酶和染色质结合,在一种流行的模型中,它把病毒整合机制与染色质联系在一起(4)。在本期PNAS中,Ferris等人。 (5)为该模型提供了有力的支持,并表明只需交换LEDGF的染色质结合域(CBD),即可改变HIV-1的靶向偏好。

著录项

  • 来源
  • 作者

    Robert Craigie;

  • 作者单位

    Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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