Molecular mechanism of a parasite kinesin motor and implications for its inhibition
Molecular mechanism of a parasite kinesin motor and implications for its inhibition
复制标题
寄生虫驱动蛋白运动的分子机制及其抑制的意义
DOI:
10.1101/2021.01.26.428220
复制
发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Cook A
中科院分区:
文献类型:
--
作者:
Cook A
Plasmodiumparasites cause malaria and are responsible annually for hundreds of thousands of deaths. They have a complex life cycle in which distinct stages are transmitted between, and reproduce in, human and mosquito hosts. In the light of emerging resistance to current therapies, components of the parasite replicative machinery are potentially important targets for anti-parasite drugs. Members of the superfamily of kinesin motors play important roles in the microtubule-based replicative spindle machinery, and kinesin-5 motors are established anti-mitotic targets in other disease contexts. We therefore studied kinesin-5 fromPlasmodium falciparum(PfK5) and characterised the biochemical properties and structure of thePfK5 motor domain. We found that thePfK5 motor domain is an ATPase with microtubule plus-end directed motility. We used cryo-EM to determine the motor’s microtubule-bound structure in no nucleotide and AMPPNP-bound states. Despite significant sequence divergence in this motor, these structures reveal that this parasite motor exhibits classical kinesin mechanochemistry. This includes ATP-induced neck-linker docking to the motor domain, which is consistent with the motor’s plus-ended directed motility. Crucially, we also observed that a large insertion in loop5 of thePfK5 motor domain creates a dramatically different chemical environment in the well characterised human kinesin-5 drug-binding site. Our data thereby reveal the possibility for selective inhibition ofPfK5 and can be used to inform future exploration ofPlasmodiumkinesins as anti-parasite targets.
登录
查看更多内容
影响因子:
10.7
作者:
Katoh K;Standley DM
通讯作者:
Standley DM
影响因子:
3
作者:
Mastronarde, DN
通讯作者:
Mastronarde, DN
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
Michael Schantz;1. Klausen;Martin Closter;2. Jespersen;Henrik Nielsen;Kamilla K Jensen;V. Jurtz;C. Sønderby;Morten Otto;Alexander Sommer;Ole Winther;Morten Nielsen;Bent Petersen;P. Marcatili
通讯作者:
P. Marcatili
影响因子:
5.7
作者:
Hwang, Wonmuk;Lang, Matthew J.;Karplus, Martin
通讯作者:
Karplus, Martin
影响因子:
4.8
作者:
Liqiong Liu;Sreeja Parameswaran;Jing Liu;Sunyoung Kim;E. Wojcik
通讯作者:
E. Wojcik