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21核苷酸的小时间RNA(stRNA)let-7调控秀丽隐杆线虫的发育时序,可能也调控其他双侧动物。我们提供了果蝇中发育调控的前体RNA通过类似RNA干扰机制切割产生成熟let-7 stRNA的体内外证据。在培养的人类细胞中,针对RNA干扰途径中的酶Dicer编码的信使RNA进行特异性破坏,导致let-7前体的积累。因此,RNA干扰路径和stRNA路径相交。两条路径均需RNA加工酶Dicer来生成活跃的小RNA组分,从而抑制基因表达。
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György Hutvágner
Juanita McLachlan
Amy E. Pasquinelli
Science
Harvard University
Massachusetts General Hospital
University of Massachusetts Chan Medical School
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Hutvágner等人(周五)研究了这个问题。
www.synapsesocial.com/papers/695f70c134bd3c474486f856 — DOI: https://doi.org/10.1126/science.1062961
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