Preventing proteostasis diseases by selective inhibition of a phosphatase regulatory subunit.

Preventing proteostasis diseases by selective inhibition of a phosphatase regulatory subunit.
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DOI:
10.1126/science.aaa4484
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发表时间:
2015-04-10
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Bertolotti A
Bertolotti A
中科院分区:
其他
文献类型:
--
作者:
Das I;Krzyzosiak A;Schneider K;Wrabetz L;D'Antonio M;Barry N;Sigurdardottir A;Bertolotti A

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Protein phosphorylation regulates virtually all biological processes. Although protein kinases are popular drug targets, targeting protein phosphatases remains a challenge. Here, we describe Sephin1 (selective inhibitor of a holophosphatase), a small molecule that safely and selectively inhibited a regulatory subunit of protein phosphatase 1 in vivo. Sephin1 selectively bound and inhibited the stress-induced PPP1R15A, but not the related and constitutive PPP1R15B, to prolong the benefit of an adaptive phospho-signaling pathway, protecting cells from otherwise lethal protein misfolding stress. In vivo, Sephin1 safely prevented the motor, morphological, and molecular defects of two otherwise unrelated protein-misfolding diseases in mice, Charcot-Marie-Tooth 1B, and amyotrophic lateral sclerosis. Thus, regulatory subunits of phosphatases are drug targets, a property exploited here to safely prevent two protein misfolding diseases.
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