Crystal structures of 17-beta-hydroxysteroid dehydrogenase 13

Author:

Liu Shenping1,Sommese Ruth1,Nedoma Nicole1,Stevens Lucy1,Dutra Jason2,Wang Yang1,Garnsey Michelle1,Clasquin Michelle1

Affiliation:

1. Pfizer Inc

2. Pfizer Inc.

Abstract

Abstract Hydroxysteroid 17-beta-dehydrogenase 13 (HSD17B13) is a hepatic lipid droplet-associated enzyme that is upregulated in patients with non-alcoholic fatty liver disease. Recently, there have been several reports that predicted loss of function variants in HSD17B13 protect against the progression of steatosis to non-alcoholic steatohepatitis with fibrosis and hepatocellular carcinoma. Here we report the first known crystal structures of full length HSD17B13 in complex with its NAD+ cofactor and with small molecule inhibitors from two distinct series. These structures provide insights into a mechanism for lipid droplet-associated proteins anchoring to membranes as well as a basis for HSD17B13 variants disrupting function. Two series of inhibitors interact with the active site residues and the bound cofactor similarly, yet they occupy different paths leading to the active site. These structures provide ideas for structure-based design of inhibitors that may be used in the treatment of liver disease.

Publisher

Research Square Platform LLC

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