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• W2018441811 endingPage "29043" @default.
• W2018441811 startingPage "29030" @default.
• W2018441811 abstract "Biologic-based strategies to inhibit proprotein convertase subtilisin/kexin type 9 (PCSK9) show promise as anti-hypercholesterolemic and, therefore, anti-atherosclerotic therapies. Despite substantial effort, no small molecule strategy to inhibit PCSK9 has demonstrated feasibility. In this study we interrogated the chemistry of the PCSK9 active site and its adjacent residues to identify a foothold with which to drug the PCSK9 processing pathway and ultimately disrupt the interaction with the LDL receptor. Here, we develop a system in which we amplify the readout of PCSK9 proteolysis with a highly specific substrate in cells, showing that the PCSK9 catalytic domain is capable of proteolysis in trans. We use this system to show that the substrate specificity for PCSK9 proteolysis is distinct from the specificity for PCSK9 secretion, demonstrating that PCSK9 processing occurs in two separate sequential steps: that of proteolysis followed by secretion. We show that specific residues in the protease recognition sequence can differentially modulate the effects on proteolysis and secretion. Additionally, we demonstrate that the clinically described, dominant negative Q152H mutation restricts proteolysis and secretion independently. Our results suggest that the PCSK9 active site and its adjacent residues serve as an allosteric modulator of protein secretion independent of its role in proteolysis, revealing a new strategy for intracellular PCSK9 inhibition." @default.
• W2018441811 created "2016-06-24" @default.
• W2018441811 creator A5048732014 @default.
• W2018441811 creator A5079376363 @default.
• W2018441811 date "2014-10-01" @default.
• W2018441811 modified "2023-10-14" @default.
• W2018441811 title "The Proprotein Convertase Subtilisin/Kexin Type 9 (PCSK9) Active Site and Cleavage Sequence Differentially Regulate Protein Secretion from Proteolysis" @default.
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• W2018441811 doi "https://doi.org/10.1074/jbc.m114.594861" @default.
• W2018441811 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4200258" @default.
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• W2018441811 hasPublicationYear "2014" @default.
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