Structure of a protein phosphatase 2A holoenzyme: insights into B55-mediated Tau dephosphorylation.
Structure of a protein phosphatase 2A holoenzyme: insights into B55-mediated Tau dephosphorylation.
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DOI:
10.1016/j.molcel.2008.08.006
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发表时间:
2008-09-26
期刊:
影响因子:
16
通讯作者:
Shi, Yigong
中科院分区:
文献类型:
--
作者:
Xu, Yanhui;Chen, Yu;Zhang, Ping;Jeffrey, Philip D.;Shi, Yigong
Protein phosphatase 2A (PP2A) regulates many essential aspects of cellular physiology. Members of the regulatory B/B55/PR55 family are thought to play a key role in the dephosphorylation of Tau, whose hyperphosphorylation contributes to Alzheimer's disease. The underlying mechanisms of the PP2A-Tau connection remain largely enigmatic. Here, we report the complete reconstitution of a Tau dephosphorylation assay and the crystal structure of a heterotrimeric PP2A holoenzyme involving the regulatory subunit Bα. We show that Bα specifically and markedly facilitates dephosphorylation of the phosphorylated Tau in our reconstituted assay. The Bα subunit comprises a seven-bladed β propeller, with an acidic, substrate-binding groove located in the center of the propeller. The β propeller latches onto the ridge of the PP2A scaffold subunit with the help of a protruding β hairpin arm. Structure-guided mutagenesis studies revealed the underpinnings of PP2A-mediated dephosphorylation of Tau.
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影响因子:
16.8
作者:
Chen, Yu;Xu, Yanhui;Shi, Yigong
通讯作者:
Shi, Yigong
影响因子:
9.8
作者:
Cho, Uhn Soo;Morrone, Seamus;Sablina, Anna A;Arroyo, Jason D;Hahn, William C;Xu, Wenqing
通讯作者:
Xu, Wenqing
DOI:
10.1107/s0907444998003254
发表时间:
1998-09-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子:
--
作者:
Brunger, AT;Adams, PD;Warren, GL
通讯作者:
Warren, GL
影响因子:
64.8
作者:
GOLDBERG, J;HUANG, HB;KURIYAN, J
通讯作者:
KURIYAN, J
影响因子:
4.1
作者:
Bryant, JC;Westphal, RS;Wadzinski, BE
通讯作者:
Wadzinski, BE