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Gp78 is an E3 ubiquitin ligase within the endoplasmic reticulum-associated degradation pathway. We show that Flag-tagged gp78 undergoes sulfhydryl cysteine palmitoylation (S-palmitoylation) within the RING finger motif, responsible for its ubiquitin ligase activity. Screening of 19 palmitoyl acyl transferases (PATs) identified five that increased gp78 RING finger palmitoylation. Endoplasmic reticulum...
Of 10 variation sites between sequences of amyloid-resistant porcine islet amyloid polypeptide (pIAPP) and amyloid-prone human IAPP (hIAPP), seven locate within residues 17–29, the most amyloidogenic fragment within hIAPP. To investigate how these variations affect amyloidogenicity, 26 IAPP(17–29) or IAPP(20–29) variants were synthesized and their secondary structures, amyloidogenicity, oligomerization...
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