Structural basis of protein phosphatase 2A stable latency.
Structural basis of protein phosphatase 2A stable latency.
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DOI:
10.1038/ncomms2663
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发表时间:
2013
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
作者:
The catalytic subunit of protein phosphatase 2A (PP2Ac) is stabilized in a latent form by α4, a regulatory protein essential for cell survival and biogenesis of all PP2A complexes. Here we report the structure of α4 bound to the N-terminal fragment of PP2Ac. This structure suggests that α4 binding to the full-length PP2Ac requires local unfolding near the active site, which perturbs the scaffold subunit binding site at the opposite surface via allosteric relay. These changes stabilize an inactive conformation of PP2Ac and convert oligomeric PP2A complexes to the α4 complex upon perturbation of the active site. The PP2Ac–α4 interface is essential for cell survival and sterically hinders a PP2A ubiquitination site, important for the stability of cellular PP2Ac. Our results show that α4 is a scavenger chaperone that binds to and stabilizes partially folded PP2Ac for stable latency, and reveal a mechanism by which α4 regulates cell survival, and biogenesis and surveillance of PP2A holoenzymes. The protein α4 is essential for the formation, stability and activity of protein phosphatase 2A (PP2A) complexes. Here the authors solve the crystal structure of a truncated PP2A bound to α4 and show that α4 binds to a partially folded form of the protein, stabilizing the enzyme in an inactive state.
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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:
4.8
作者:
LeNoue-Newton, Michele;Watkins, Guy R.;Spiller, Benjamin W.
通讯作者:
Spiller, Benjamin W.
影响因子:
16
作者:
Düvel, K;Santhanam, A;Broach, JR
通讯作者:
Broach, JR
DOI:
10.1107/s0907444901016535
发表时间:
2001-12-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子:
--
作者:
de Graaff, RAG;Hilge, M;Abrahams, JP
通讯作者:
Abrahams, JP
影响因子:
8
作者:
Chen, L-P;Lai, Y-D;Chen, W.
通讯作者:
Chen, W.