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Kinetic and structural parameters governing Fic-mediated adenylylation/AMPylation of the Hsp70 chaperone, BiP/GRP78

Cell Stress Chaperones. 2021-05; 
Anwesha Sanyal, Erica A Zbornik, Ben G Watson, Charles Christoffer, Jia Ma, Daisuke Kihara, Seema Mattoo
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PCR Cloning and Subcloning BiP NBD (aa 28-405) and SBD (aa 418-637) were cloned in an N-terminal His fusion in pET45b (Genscript; www.genscript.com) Get A Quote

摘要

Fic (filamentation induced by cAMP) proteins regulate diverse cell signaling events by post-translationally modifying their protein targets, predominantly by the addition of an AMP (adenosine monophosphate). This modification is called Fic-mediated adenylylation or AMPylation. We previously reported that the human Fic protein, HYPE/FicD, is a novel regulator of the unfolded protein response (UPR) that maintains homeostasis in the endoplasmic reticulum (ER) in response to stress from misfolded proteins. Specifically, HYPE regulates UPR by adenylylating the ER chaperone, BiP/GRP78, which serves as a sentinel for UPR activation. Maintaining ER homeostasis is critical for determining cell fate, thus highlighting th... More

关键词

AMPylation, Adenylylation, BiP/GRP78, ER stress, FicD/HYPE, Hsp70, Post-translational modification, Unfolded protein response