Structure and function of the PP2A-shugoshin interaction.
Structure and function of the PP2A-shugoshin interaction.
复制标题
DOI:
10.1016/j.molcel.2009.06.031
复制
发表时间:
2009-08-28
期刊:
影响因子:
16
通讯作者:
Xu W
中科院分区:
文献类型:
--
作者:
Xu Z;Cetin B;Anger M;Cho US;Helmhart W;Nasmyth K;Xu W
Accurate chromosome segregation during mitosis and meiosis depends on shugoshin proteins that prevent precocious dissociation of cohesin from centromeres. Shugoshins associate with PP2A, which is thought to de-phosphorylate cohesin and thereby prevent cleavage by separase during meiosis I. A crystal structure of a complex between a fragment of human Sgo1 and an AB’C PP2A holoenzyme reveals that Sgo1 forms a homodimeric parallel coiled-coil that docks simultaneously onto PP2A’s C and B’ subunits. Sgo1 homo-dimerization is a pre-requisite for PP2A binding. While hSgo1 interacts only with the AB’C holoenzymes, its relative Sgo2 interacts with all PP2A forms and may thus lead to dephosphorylation of distinct substrates. Mutant shugoshin proteins defective in the binding of PP2A cannot protect centromeric cohesin from separase during meiosis I or support the spindle assembly checkpoint in yeast. Finally, we provide evidence that PP2A’s recruitment to chromosomes may be sufficient to protect cohesin from separase in mammalian oocytes.
登录
查看更多内容
影响因子:
9.8
作者:
McGuinness BE;Hirota T;Kudo NR;Peters JM;Nasmyth K
通讯作者:
Nasmyth K
影响因子:
64.8
作者:
Kitajima, TS;Sakuno, T;Watanabe, Y
通讯作者:
Watanabe, Y
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
64.5
作者:
Kudo, Nobuaki R.;Wassmann, Katja;Nasmyth, Kim
通讯作者:
Nasmyth, Kim
影响因子:
64.8
作者:
Cho, Uhn Soo;Xu, Wenqing
通讯作者:
Xu, Wenqing