| ²é¿´: 937 | »Ø¸´: 0 | ||||
½úÅô°æÖ÷ (ÖªÃû×÷¼Ò)
|
[½»Á÷]
[ÓÅÐãÎÄÕÂÍÆ¼ö]Molecular Cell£ºµ°°×ÖÊ·ÒëºóÐÞÊε÷¿ØÖ²ÎïвÆÈ·´Ó¦Ñо¿È¡µÃ½øÕ¹
|
|
µ°°×ÖÊÑÇÏõ»ù»¯Óë¼×»ù»¯Í¨Â·»¥×÷µ÷¿ØÖ²ÎïвÆÈ·´Ó¦µÄ¹¤×÷Ä£ÐÍͼ ¡¡¡¡¼×»ù»¯ÐÞÊÎÓëÒ»Ñõ»¯µªÒÀÀµµÄÑÇÏõ»ù»¯ÐÞÊÎÊǸ߶ȱ£Êصĵ°°×ÖÊ·ÒëºóÐÞÊΣ¬ÕâÁ½ÀàÐÞÊβÎÓëµ÷¿ØÖÚ¶àÉúÎïѧ¹ý³Ì£¬°üÀ¨µ÷¿Ø·ÇÉúÎïвÆÈ·´Ó¦¡£µ«¶þÕßµ÷¿Ø·ÇÉúÎïвÆÈµÄ·Ö×Ó»úÖÆ²»ÉõÇå³þ¡£ ¡¡¡¡Öйú¿ÆÑ§ÔºÒÅ´«Óë·¢ÓýÉúÎïѧÑо¿Ëù×ó½¨ÈåÑо¿×éÔÚÑÇÏõ»ù»¯µ°°×ÖÊ×éѧÑо¿Öз¢ÏÖ£¬ÄâÄϽ浰°×Öʾ«°±Ëá¼×»ù×ªÒÆÃ¸PRMT5±»ÑÇÏõ»ù»¯ÐÞÊΡ£PRMT5ÊÇÔڸߵÈÕæºËÉúÎïÖи߶ȱ£ÊصÄÒ»¸öø£¬´ß»¯¾«°±ËáË«¶Ô³ÆÐÔ¼×»ù»¯ÐÞÊΣ¬Æäµ×Îï°üÀ¨pre-mRNA¼ô½ÓÌåµÄºËÐÄ×é·Ö¡£Éú»¯ºÍ·Ö×ÓÒÅ´«Ñ§·ÖÎö±íÃ÷£¬ÔÚÏìÓ¦·ÇÉúÎïвÆÈʱ£¬NOͨ¹ý¶ÔPRMT5µÚ125λ°ëë×°±Ëá²Ð»ù(Cys-125)ÌØÒìµÄÑÇÏõ»ù»¯ÐÞÊζøµ÷¿ØÆä¼×»ù×ªÒÆÃ¸»îÐÔ£¬¼´Cys-125ΪPRMT5¸ÐÊÜNOÐźűØÐè¡£PRMT5¼×»ù×ªÒÆÃ¸ÖÐCys-125µÄÑÇÏõ»ù»¯ÐÞÊÎÔöÇ¿ÁËÖ²ÎïÌåÄÚ¾«°±ËáË«¶Ô³ÆÐÔ¼×»ù»¯ÐÞÊεÄˮƽ£¬½éµ¼Ð²ÆÈÏà¹Ø»ùÒòpre-mRNAµÄÕý³£¼ôÇУ¬Òò¶øÔöÇ¿ÁËÖ²Îï¶ÔвÆÈµÄÄÍÊÜÐÔ¡£ÉÏÊöÑо¿·¢ÏÖNO½éµ¼µÄµ°°×ÖÊÑÇÏõ»ù»¯ÐÞÊÎÓëµ°°×Öʼ׻ù»¯Í¨Â·»¥×÷£¬´Ó¶øÐµ÷Ö²ÎïÞ׿¹·ÇÉúÎïвÆÈµÄ·Ö×Ó»úÖÆ¡£ S-Nitrosylation at Cys-125 Enhances PRMT5 Methyltransferase Activity ¡¡¡¡ÉÏÊöÑо¿ÓÉÒÅ´«·¢ÓýËù×ó½¨ÈåÑо¿×é¡¢²ÜÏþ·çÑо¿×é¡¢±«Ê±À´Ñо¿×éÓëÖпÆÔºÎ¢ÉúÎïÑо¿Ëù¿×ÕÕʤÑо¿×éºÏ×÷Íê³É¡£Ïà¹ØÂÛÎÄÓÚ7ÔÂ27ÈÕÔÚMolecular CellÔÓÖ¾ÔÚÏß·¢±í¡£×ó½¨ÈåÑо¿×鲩ʿºóºú¼ÃÁº¡¢×ó½¨ÈåÑо¿×éÓë¿×ÕÕʤÑо¿×éÁªºÏÅàÑø²©Ê¿ºóÑî»À½ÜΪ¸ÃÂÛÎĹ²Í¬µÚÒ»×÷Õß¡£¸ÃÑо¿µÃµ½Á˹ú¼Ò×ÔÈ»¿ÆÑ§»ù½ðί¡¢ÖпÆÔºÕ½ÂÔÐÔÏȵ¼¿Æ¼¼×¨Ïî¡¢Ö²Îï»ùÒò×é¹ú¼ÒÖØµãʵÑéÊÒ¡¢Öйú²©Ê¿ºó¿ÆÑ§»ù½ð»áÓëÖпÆÔºÁªºÏ×ÊÖú²©Ê¿ºó»ù½ðµÈµÄ×ÊÖú¡£ Summary ¡¡¡¡Methylation and nitric oxide (NO)-based S-nitrosylation are highly conserved protein posttranslational modifications that regulate diverse biological processes. In higher eukaryotes, PRMT5 catalyzes Arg symmetric dimethylation, including key components of the spliceosome. The Arabidopsis prmt5 mutant shows severe developmental defects and impaired stress responses. However, little is known about the mechanisms regulating the PRMT5 activity. Here, we report that NO positively regulates the PRMT5 activity through S-nitrosylation at Cys-125 during stress responses. In prmt5-1 plants, a PRMT5C125S transgene, carrying a non-nitrosylatable mutation at Cys-125, fully rescues the developmental defects, but not the stress hypersensitive phenotype and the responsiveness to NO during stress responses. Moreover, the salt-induced Arg symmetric dimethylation is abolished in PRMT5C125S/prmt5-1 plants, correlated to aberrant splicing of pre-mRNA derived from a stress-related gene. These findings define a mechanism by which plants transduce stress-triggered NO signal to protein methylation machinery through S-nitrosylation of PRMT5 in response to environmental alterations. |
» ÊÕ¼±¾ÌûµÄÌÔÌûר¼ÍƼö
Å©ÁÖ½øÕ¹ |
» ²ÂÄãϲ»¶
26É격
ÒѾÓÐ3È˻ظ´
Çóµ÷¼Á£¬×Ü·Ö315£¬¿¼µÄÉúÎïÒ½Ò©£¬Ò»Ö¾Ô¸ºþÄÏʦ·¶´óѧ¡£µ÷¼Áµ½ÈκÎרҵ¶¼¿ÉÒÔ
ÒѾÓÐ3È˻ظ´
²ÄÁÏר˶306Ó¢Ò»Êý¶þ
ÒѾÓÐ7È˻ظ´
²ÄÁϹ¤³Ìר˶274Ò»Ö¾Ô¸211Çóµ÷¼Á
ÒѾÓÐ6È˻ظ´
318Çóµ÷¼Á
ÒѾÓÐ5È˻ظ´
Ò»Ö¾Ô¸ÄϾ©´óѧ£¬080500²ÄÁÏ¿ÆÑ§Ó빤³Ì£¬µ÷¼Á
ÒѾÓÐ4È˻ظ´
332Çóµ÷¼Á
ÒѾÓÐ5È˻ظ´
271Çóµ÷¼Á
ÒѾÓÐ14È˻ظ´
275Çóµ÷¼Á
ÒѾÓÐ4È˻ظ´
302Çóµ÷¼Á
ÒѾÓÐ8È˻ظ´
» ±¾Ö÷ÌâÏà¹ØÉ̼ÒÍÆ¼ö: (ÎÒÒ²ÒªÔÚÕâÀïÍÆ¹ã)














»Ø¸´´ËÂ¥
