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DSSylation, a novel protein modification targets proteins induced by oxidative stress, and facilitates their degradation in cells
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DSSylation, a novel protein modification targets proteins induced by oxidative stress, and facilitates their degradation in cells
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Journal Article
DSSylation, a novel protein modification targets proteins induced by oxidative stress, and facilitates their degradation in cells
2014
Overview
Timely removal of oxidatively damaged proteins is crit- ical for cells exposed to oxidative stresses; however, cellular mechanism for clearing oxidized proteins is not clear. Our study reveals a novel type of protein modifi- cation that may play a role in targeting oxidized proteins and remove them. In this process, DSS1 （deleted in split hand/split foot 1）, an evolutionally conserved small protein, is conjugated to proteins induced by oxidative stresses in vitro and in vivo, implying oxidized proteins are DSS1 clients. A subsequent ubiquitination targeting DSSl-protein adducts has been observed, suggesting the client proteins are degraded through the ubiquitin- proteasome pathway. The DSS1 attachment to its clients is evidenced to be an enzymatic process modulated by an unidentified ATPase. We name this novel protein modification as DSSylation, in which DSS1 plays as amodifier, whose attachment may render target proteins a signature leading to their subsequent ubiquitination, thereby recruits proteasome to degrade them.
Publisher
Higher Education Press,Springer Nature B.V
