| ²é¿´: 1972 | »Ø¸´: 5 | |||
xieym1979гæ (³õÈëÎÄ̳)
|
[½»Á÷]
Science×Ó¿¯: ½ÒʾÉñ¾ÊÜÌåDscam1µÄÏ໥×÷ÓûúÖÆ
|
|
2016Äê5ÔÂ27ÈÕ£¬ËÄ´¨´óѧ»ªÎ÷Ò½ÔºÉúÎïÖÎÁƹú¼ÒÖØµãʵÑéÊÒ³ÂÇ¿ºÍÓàÑÅ÷¿ÎÌâ×éÔÚ¹ú¼ÊÖøÃûѧÊõ¿¯ÎïScience×Ó¿¯Science AdvancesÉÏ·¢±íÌâΪ¡¶Structural basis of Dscam1 homodimerization: Insights into context-constraint for protein recognition¡·µÄÂÛÎÄ£¨Sci. Adv. 2016; 2 : e1501118. DOI: 10.1126/sciadv.1501118£©¡£ËÄ´¨´óѧ»ªÎ÷Ò½ÔºÉúÎïÖÎÁƹú¼ÒÖØµãʵÑéÊÒ2015¼¶²©Ê¿ÉúÀîÊç°ººÍ³ÌÁÕÄÈΪ¸ÃÂÛÎĵĹ²Í¬µÚÒ»×÷Õߣ¬³ÂÇ¿ºÍÓàÑÅ÷¸±½ÌÊÚΪÂÛÎĵÄͨѶ×÷Õߣ¬ËÄ´¨´óѧΪΨһ×÷Õßµ¥Î»¡£ Dscam1 (Down Syndrome Cell Adhesion Molecule 1) ÔÚÉñ¾·¢ÓýºÍÌÆÊÏ×ÛºÏÖ¢ÒýÆðµÄÉñ¾ÏµÍ³¹¦ÄÜȱÏÝÖÐÆð¹Ø¼ü×÷Óá£ÔÚģʽÉúÎï¹ûÓ¬ÖУ¬Dscam1 µ°°×¿ÉÓÉRNA Æ´½Ó¶øÐγÉÈýÍòÖÖÒÔÉϲ»Í¬µÄÒì¹¹Ì壬²¢ÇÒÆäͬԴÏ໥×÷ÓñíÏÖ³öÓкÜÇ¿µÄÒì¹¹ÌåÌØÒìÐÔ£¬¹Ê¶øÒýÆðÑо¿½ç¹ã·ºµÄ¹Ø×¢¡£2007Äê¡¶Nature¡·ºÍ2008Äê¡¶Cell¡·ÔÓÖ¾·Ö±ð±¨µÀÁËDscam1µ°°×µÄ¾§Ìå½á¹¹£¬µ«¶ÔÓÚDscam1µÄÏ໥×÷ÓÃģʽ»¹ÓÐÕùÂÛ¡£¸Õ¸Õ·¢±íÔÚ¡¶Science Advances¡·µÄÕâÆªÂÛÎÄÌṩÁËÈ·ÔäµÄʵÑéÖ¤¾Ý£¬Ö¸³ö2007Äê¡¶Nature¡·ÂÛÎÄÖеÄÒ»¸ö½á¹¹ÊÇÓÉÓÚ¾§ÌåÅÅÁÐÔì³ÉµÄ¼ÙÏó¡£Í¨¹ý¶à¸ö½á¹¹µÄ±È½Ï£¬¸ÃÂÛÎIJûÃ÷ÁËDscam1Ï໥×÷ÓõķÖ×Ó»úÀí£¬²¢Ìá³öÁËÒ»¸ö¡°ÕûÌåÔ¼Êø¡±µÄ¸ÅÄî¡£ ![]() ¸ÃÂÛÎĵÄͨѶ×÷Õß³Âǿ˵£º¡°ÕâÆªÂÛÎÄÊÇÎÒÃÇ2013ÄêÔÚ´¨´ó½¨Á¢ÊµÑéÊÒÖ®ºó·¢±íµÄµÚÈýƪ¹ØÓÚDscam1µÄÑо¿ÂÛÎÄ¡£ÂÛÎÄÖб¨µÀÁË12¸ö¾§Ìå½á¹¹£¬´Ó¶ø¿ÉÒÔ¶ÔDscam1²»Í¬Òì¹¹ÌåµÄÏ໥×÷ÓýøÐÐÉîÈëµÄ±È½Ï£¬ËùÒÔÎÒÃÇ¿ÉÒÔÇå³þµØ½âÊÍDscam1Ï໥×÷ÓõÄÌØÒìÐÔ£¬ÒÔ¼°Ä³Ð©½»²æÏ໥×÷ÓÃΪʲôÄܹ»·¢Éú¡£ÕâÆªÂÛÎIJ»½ö½â¾öÁËǰÈ˵ÄÕùÂÛ£¬»¹ÓÐһЩеķ¢ÏÖ£¬±ÈÈçÌÇ»ù»¯ºÍ±íÃæµçÊÆ¶ÔDscam1Ï໥×÷ÓõÄÓ°Ïì¡£ÎÒÃÇÌá³öµÄ¡°ÕûÌåÔ¼Êø¡±µÄ¸ÅÄî¶ÔÓÚÀí½âDscam1ÒÔÍâµÄµ°°×ÖÊÏ໥×÷ÓÃÒ²ºÜÓвο¼ÒâÒå¡£ Abstract The Drosophila neural receptor Dscam1 (Down syndrome cell adhesion molecule 1) plays an essential role in neuronal wiring and self-avoidance. Dscam1 potentially encodes 19,008 ectodomains through alternative RNA splicing and exhibits exquisite isoform-specific homophilic binding, which makes it an exceptional example for studying protein binding specificity. However, structural information on Dscam1 is limited, which hinders illumination of the mechanism of Dscam1 isoform-specific recognition. Whether different Dscam1 isoforms adopt the same dimerization mode remains a subject of debate. We present 12 Dscam1 crystal structures, provide direct evidence indicating that all isoforms adopt a conserved homodimer geometry in a modular fashion, identify two mechanisms for the Ig2 binding domain to dispel electrostatic repulsion during dimerization, decode Ig2 binding specificity by a central motif at its symmetry center, uncover the role of glycosylation in Dscam1 homodimerization, and find electrostatic potential complementarity to help define the binding region and the antiparallel binding mode. We then propose a concept that the context of a protein may set restrictions to regulate its binding specificity, which provides a better understanding of protein recognition. https://advances.sciencemag.org/content/2/5/e1501118 |
» ±¾Ìû¸½¼þ×ÊÔ´Áбí
-
»¶Ó¼à¶½ºÍ·´À¡£ºÐ¡Ä¾³æ½öÌṩ½»Á÷ƽ̨£¬²»¶Ô¸ÃÄÚÈݸºÔð¡£
±¾ÄÚÈÝÓÉÓû§×ÔÖ÷·¢²¼£¬Èç¹ûÆäÄÚÈÝÉæ¼°µ½ÖªÊ¶²úȨÎÊÌ⣬ÆäÔðÈÎÔÚÓÚÓû§±¾ÈË£¬Èç¶Ô°æÈ¨ÓÐÒìÒ飬ÇëÁªÏµÓÊÏ䣺xiaomuchong@tal.com - ¸½¼þ 1 : ³ÂÇ¿¡ª¡ªDscam1Ðû´«¸å.docx
2016-05-28 08:42:06, 388.72 K
» ²ÂÄãϲ»¶
294Çóµ÷¼Á²ÄÁÏÓ뻯¹¤×¨Ë¶
ÒѾÓÐ10È˻ظ´
288Çóµ÷¼Á
ÒѾÓÐ6È˻ظ´
287Çóµ÷¼Á
ÒѾÓÐ4È˻ظ´
ÕÐÊÕµ÷¼Á˶ʿ
ÒѾÓÐ7È˻ظ´
085601²ÄÁϹ¤³Ìר˶Çóµ÷¼Á
ÒѾÓÐ8È˻ظ´
Ò»Ö¾Ô¸Î人Àí¹¤²ÄÁϹ¤³Ìר˶µ÷¼Á
ÒѾÓÐ3È˻ظ´
¡¾¿¼Ñе÷¼Á¡¿»¯Ñ§×¨Òµ 281·Ö£¬Ò»Ö¾Ô¸ËÄ´¨´óѧ£¬³ÏÐÄÇóµ÷¼Á
ÒѾÓÐ3È˻ظ´
281Çóµ÷¼Á£¨0805£©
ÒѾÓÐ19È˻ظ´
²ÄÁÏ¿¼Ñе÷¼Á
ÒѾÓÐ3È˻ظ´
346Çóµ÷¼Á[0856]
ÒѾÓÐ6È˻ظ´
» ±¾Ö÷ÌâÏà¹ØÉ̼ÒÍÆ¼ö: (ÎÒÒ²ÒªÔÚÕâÀïÍÆ¹ã)
lsj051
Ìú¸Ëľ³æ (ÎÄ̳¾«Ó¢)
- Ó¦Öú: 18 (СѧÉú)
- ½ð±Ò: 21986
- ºì»¨: 7
- ɳ·¢: 6
- Ìû×Ó: 12159
- ÔÚÏß: 159.4Сʱ
- ³æºÅ: 1536498
- ×¢²á: 2011-12-14
- רҵ: µç´Å³¡Ó벨

2Â¥2016-05-28 15:51:10
![]() |
3Â¥2016-05-28 17:28:06
|
4Â¥2016-05-28 17:36:40
5Â¥2016-05-29 16:14:19
irvine2015
ľ³æ (ÖøÃûдÊÖ)
- Ó¦Öú: 57 (³õÖÐÉú)
- ½ð±Ò: 5456
- ºì»¨: 7
- Ìû×Ó: 1933
- ÔÚÏß: 109.7Сʱ
- ³æºÅ: 3863593
- ×¢²á: 2015-05-11
- ÐÔ±ð: GG
- רҵ: ÖÊÆ×·ÖÎö

6Â¥2016-05-29 23:12:01














»Ø¸´´ËÂ¥

