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Nucleation of nuclear bodies by RNA RNA½éµ¼µÄºËÌå³ÉºË×÷Óà Sergey P. Shevtsov1 & Miroslav Dundr Nature Cell Biology Volume: 13, Pages: 167¨C173 Year published: (2011) DOI: doi:10.1038/ncb2157 Received 05 May 2010 Accepted 06 December 2010 Published online 16 January 2011 ÕªÒª£ºThe biogenesis of the many functional compartments contained in the mammalian cell nucleus is poorly understood. More specifically, little is known regarding the initial nucleation step required for nuclear body formation. Here we show that RNA can function as a structural element and a nucleatorof nuclear bodies. We find that several types of coding and noncodingRNAs are sufficient to de novoassemble, and are physiologically enriched in, histonelocus bodies (with associated Cajalbodies), nuclear speckles, paraspecklesand nuclear stress bodies. Formation of nuclear bodies occurs through recruitment and accumulation of proteins resident in the nuclear bodies by nucleating RNA. These results demonstrate that transcription is a driving force in nuclear body formation and RNA transcripts can function as a scaffold in the formation of major nuclear bodies. Together, these data suggest that RNA-primed biogenesis of nuclear bodies is a general principle of nuclear organization. 1.²¸È鶯Îïϸ°ûºË°üº¬µÄ¹¦ÄÜ×é·ÖµÄÉúÎïÆðÔ´²¢²»Çå³þ¡£¸ü¾ßÌåµÄ˵£¬¹ØÓÚºËÌåÐγÉËùÐèµÄÆðʼ³ÉºË²½ÖèÖªÖ®ÉõÉÙ¡£ÕâÀÎÒÃÇչʾÁËRNA¿ÉÒÔÐÐʹ½á¹¹Ôª¼þµÄ¹¦Äܲ¢ÇÒ×÷ΪºËÌåµÄ³ÉºË¼Á¡£ 2.ÎÒÃÇ·¢ÏÖ¼¸Àà±àÂëºÍ·Ç±àÂëRNA¾Í×ãÒÔ´ÓÍ·×é×°×éµ°°×Ì壨ÓëCajalÊÏÌåÏà¹Ø£©¡¢ºË°ß¡¢Å԰ߺÍѹÁ¦Ì壨nSB£©£¬²¢ÇÒÔÚÉúÀí×´¿öÏÂËüÃÇÖи»¼¯¡£ºËÌåµÄÐγÉͨ¹ý³ÉºËRNA=²¢Ê¹µ°°×ÔÚºËÌåÖлýÀÛ¡£ 3.ÕâЩ½á¹û²ûÊÍת¼ÊǺËÌåÐγɵÄÇý¶¯Á¦ÇÒRNAת¼ÎïÄÜÐÐʹÖ÷ÒªºËÌåÐγÉÖ§¼ÜµÄ¹¦ÄÜ¡£×ܶøÑÔÖ®£¬ÕâЩÊý¾Ý°µÊ¾Ò»¸öϸ°ûºË×éÖ¯µÄÒ»°ãÔÔò£ºÒÔRNAΪ±¾µÄºËÌåµÄÉúÎïÆðÔ´¡£ [ Last edited by silicare on 2011-4-1 at 18:04 ] |
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