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Bound to splice

机译:一定要拼接

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摘要

Messenger RNAs don't usually correspond exactly to DNA - portions of the primary transcript, known as introns, are removed by splicing. A study reveals new ways in which splicing can be regulated. Complex eukaryotes, such as animals, have extensive RNA splicing to remove sequences that don't encode proteins (introns) and to connect those that do (exons). Often, several messenger RNAs can be generated by a single gene, because different patterns of splicing place different exons into the final mRNAs. As an example, the Dscam gene of the fruitfly Drosophila contains 24 exons, and is thought to encode 38,016 different protein isoforms by alternative splicing (although we're not sure anyone has counted). In this particular case, 'docking' and 'selector' sequences within the primary transcript help regulate splicing. But in general, understanding exactly how a cell picks and chooses among the many possible combinations of splices has been a long-standing problem.
机译:信使RNA通常不完全对应于DNA-最初的转录物部分(称为内含子)通过剪接被去除。一项研究揭示了调节拼接的新方法。复杂的真核生物(例如动物)具有广泛的RNA剪接,可去除不编码蛋白质的序列(内含子)并连接可编码蛋白质的序列(外显子)。通常,一个基因可以产生多个信使RNA,因为不同的剪接方式会将不同的外显子置于最终的mRNA中。例如,果蝇果蝇的Dscam基因包含24个外显子,并且通过选择性剪接被认为可编码38,016种不同的蛋白质同工型(尽管我们不确定是否有人数过)。在这种特殊情况下,主要转录本中的“对接”和“选择子”序列有助于调节剪接。但是总的来说,准确了解细胞如何在多种可能的拼接组合中进行选择和选择一直是一个长期存在的问题。

著录项

  • 来源
    《Nature》 |2008年第7215期|p.885-886|共2页
  • 作者单位

    Department of Physics and Astronomy, University of Hawaii, Hilo, Hawaii 96720, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);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
  • 中图分类 自然科学总论;
  • 关键词

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