The CEP19-RABL2 GTPase Complex Binds IFT-B to Initiate Intraflagellar Transport at the Ciliary Base.

The CEP19-RABL2 GTPase Complex Binds IFT-B to Initiate Intraflagellar Transport at the Ciliary Base.
复制标题

DOI:
10.1016/j.devcel.2017.05.016
复制
发表时间:
2017-07-10
期刊:
影响因子:
11.8
通讯作者:
Jackson PK
Jackson PK
中科院分区:
生物学1区
文献类型:
--
作者:
Kanie T;Abbott KL;Mooney NA;Plowey ED;Demeter J;Jackson PK

文献摘要

参考文献

被引文献

相似文献

高度保守的鞭毛内转运(IFT)蛋白复合物指导初级纤毛的组装和信号分子的运输。IFT复合物最初积累在纤毛的基部,并周期性地进入纤毛,这表明触发IFT复合物的纤毛进入的尚未确定的机制。使用AP-MS纯化的中心体和纤毛蛋白质,CEP 19的相互作用,我们确定CEP 350,FOP和RABL 2 GTdR作为蛋白质组织的第一个已知的机制,指导纤毛进入IFT复合物。我们发现CEP 19被中心粒CEP 350/FOP复合物募集到睫状体基底,然后特异性捕获与GT结合的RABL 2B,RABL 2B通过其固有的核苷酸交换被激活。然后,活化的RABL 2 B从预对接的IFT-B复合物的大池中捕获并释放其单一效应物,鞭毛内转运B全复合物,从而启动IFT的纤毛进入。鞭毛内转运蛋白(IFT)复合物在纤毛基部积累,并通过未知的机制定期进入纤毛。Kanie等人表明,CEP 19将RABL 2B GTdR复合物募集到睫状体基底,在那里它介导IFT-B从预对接复合物释放以启动IFT睫状体进入。
Highly conserved intraflagellar transport (IFT) protein complexes direct both the assembly of primary cilia and the trafficking of signaling molecules. IFT complexes initially accumulate at the base of the cilium, and periodically enter the cilium suggesting a yet identified mechanism that triggers ciliary entry of IFT complexes. Using AP-MS purification of interactors of the centrosomal and ciliopathy protein, CEP19, we identify CEP350, FOP and the RABL2 GTPase as proteins organizing the first known mechanism directing ciliary entry of IFT complexes. We discover that CEP19 is recruited to the ciliary base by the centriolar CEP350/FOP complex, and then specifically captures GTP-bound RABL2B, which is activated via its intrinsic nucleotide exchange. Activated RABL2B then captures and releases its single effector, the intraflagellar transport B holocomplex, from the large pool of pre-docked IFT-B complexes and thus initiates ciliary entry of IFT. Intraflagellar transport protein (IFT) complexes accumulate at the ciliary base and periodically enter the cilium via an unknown mechanism. Kanie et al. show that CEP19 recruits the RABL2B GTPase complex to the ciliary base where it mediates release of IFT-B from pre-docked complexes to initiate IFT ciliary entry.
DOI: 10.1091/mbc.e17-01-0051
发表时间: 2017-04-01
影响因子: 3.3
作者:
Katoh Y;Michisaka S;Nozaki S;Funabashi T;Hirano T;Takei R;Nakayama K
通讯作者: Nakayama K
DOI: 10.1038/ejhg.2012.115
发表时间: 2013-01-01
影响因子: 5.2
作者:
Forsythe, Elizabeth;Beales, Philip L.
通讯作者: Beales, Philip L.
DOI: 10.1242/dev.02153
发表时间: 2005-12-01
期刊: DEVELOPMENT
影响因子: 4.6
作者:
Banizs, B;Pike, MM;Yoder, BK
通讯作者: Yoder, BK
DOI: 10.1371/journal.pone.0058589
发表时间: 2013
期刊: PloS one
影响因子: 3.7
作者:
Lee JY;Stearns T
通讯作者: Stearns T
DOI: 10.1093/nar/gku936
发表时间: 2014-12-16
影响因子: 14.9
作者:
Brinkman EK;Chen T;Amendola M;van Steensel B
通讯作者: van Steensel B