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KRASµÄÐźÅͨ·

2023-12-19
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KRASÐźŵ碌îÊÇÒ»¸ö¶à°ì·¨µÄÀú³Ì£¬ £¬£¬£¬£¬ÐèÒªÊʵ±µÄKRAS·­ÒëºóÐÞÊΣ¬ £¬£¬£¬£¬Ï¸°ûĤ¶¨Î»ÓëЧӦÂѰ׵ÄÏ໥×÷Óᣡ£ ¡£¡£¡£¡£

The activation of KRAS signaling is a multi-step process that requires proper KRAS post-translation£¬ £¬£¬£¬£¬plasma membrane-localization and interaction with effector proteins.

ÔÚϸ°ûÍâ´Ì¼¤×÷ÓÃÏ£¬ £¬£¬£¬£¬´Óʧ»îµÄRAS-GDPµ½¼¤»îµÄRAS-GDPµÄת»¯½øÒ»²½Ôö½øÁ˶àÖÖÐźÅͨ·µÄ¼¤»î£¬ £¬£¬£¬£¬°üÀ¨MAPKͨ·¡¢PI3k ͨ·ºÍRal-GEFsͨ·£¬ £¬£¬£¬£¬ÆäÖÐÒÔMAPKͨ·µÄÌØÕ÷×îΪÏÔ×Å¡£¡£ ¡£¡£¡£¡£

In response to extracellular stimuli, the conversion from inactive RAS-GDP to active RAS-GDP further promotes the activation of various signaling pathways, which includes MAPK pathway£¬ £¬£¬£¬£¬PI3k pathway and the Ral-GEFs pathway,among them the MAPK pathway is the best characterized.

RAS-GDPÖ±½ÓÓëRAFÂѰ×Á¬Ïµ£¬ £¬£¬£¬£¬½«RAF¼¤Ã¸¼Ò×å´Óϸ°ûÖÊÕÐﵽĤÉÏ£¬ £¬£¬£¬£¬ÔÚϸ°ûĤÉ϶þ¾Û»¯²¢»î»¯¡£¡£ ¡£¡£¡£¡£¼¤»îµÄRAFËæºó¶ÔÆäÏÂÓε×Î £¬£¬£¬£¬¼´MEK and ERk¾ÙÐÐһϵÁÐÁ×Ëữ·´Ó¦£¬ £¬£¬£¬£¬²¢´«µ¼Éú³¤ÐźÅ¡£¡£ ¡£¡£¡£¡£

RAS-GDP directly binds to RAF protein,recruiting RAF Kinese family from cytoplasm to membranes£¬ £¬£¬£¬£¬where they dimerize and become active. The activated RAF subsequently carries out a chain of phospholation reactions to its downstream substrates, MEK and ERk, and propagates the growth signal.

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