6w44 | pdb_00006w44
Crystal structure of HAO1 in complex with indazole acid inhibitor - compound 4
Structural highlights
FunctionHAOX1_HUMAN Has 2-hydroxyacid oxidase activity. Most active on the 2-carbon substrate glycolate, but is also active on 2-hydroxy fatty acids, with high activity towards 2-hydroxy palmitate and 2-hydroxy octanoate. Publication Abstract from PubMedInhibition of hydroxy acid oxidase 1 (HAO1) is a strategy to mitigate the accumulation of toxic oxalate that results from reduced activity of alanine-glyoxylate aminotransferase (AGXT) in primary hyperoxaluria 1 (PH1) patients. DNA-Encoded Chemical Library (DECL) screening provided two novel chemical series of potent HAO1 inhibitors, represented by compounds 3-6. Compound 5 was further optimized via various structure-activity relationship (SAR) exploration methods to 29, a compound with improved potency and absorption, distribution, metabolism, and excretion (ADME)/pharmacokinetic (PK) properties. Since carboxylic acid-containing compounds are often poorly permeable and have potential active glucuronide metabolites, we undertook a brief, initial exploration of acid replacements with the aim of identifying non-acid-containing HAO1 inhibitors. Structure-based drug design initiated with Compound 5 led to the identification of a nonacid inhibitor of HAO1, 31, which has weaker potency and increased permeability. Discovery of Novel, Potent Inhibitors of Hydroxy Acid Oxidase 1 (HAO1) Using DNA-Encoded Chemical Library Screening.,Lee ECY, McRiner AJ, Georgiadis KE, Liu J, Wang Z, Ferguson AD, Levin B, von Rechenberg M, Hupp CD, Monteiro MI, Keefe AD, Olszewski A, Eyermann CJ, Centrella P, Liu Y, Arora S, Cuozzo JW, Zhang Y, Clark MA, Huguet C, Kohlmann A J Med Chem. 2021 May 6. doi: 10.1021/acs.jmedchem.0c02271. PMID:33955740[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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