5enk | pdb_00005enk
Compound 18
Structural highlights
Function[BACE1_HUMAN] Responsible for the proteolytic processing of the amyloid precursor protein (APP). Cleaves at the N-terminus of the A-beta peptide sequence, between residues 671 and 672 of APP, leads to the generation and extracellular release of beta-cleaved soluble APP, and a corresponding cell-associated C-terminal fragment which is later released by gamma-secretase.[1] [2] Publication Abstract from PubMedBy targeting the flap backbone of the BACE1 active site, we discovered 6-dimethylisoxazole-substituted biaryl aminothiazine 18 with 34-fold improved BACE1 inhibitory activity over the lead compound 1. The cocrystal structure of 18 bound to the active site indicated two hydrogen-bond interactions between the dimethylisoxazole and threonine 72 and glutamine 73 of the flap. Incorporation of the dimethylisoxazole substitution onto the related aminothiazine carboxamide series led to pyrazine-carboxamide 26 as a very potent BACE1 inhibitor (IC50 < 1 nM). This compound demonstrated robust brain Abeta reduction in rat dose-response studies. Thus, compound 26 may be useful in testing the amyloid hypothesis of Alzheimer's disease. Targeting the BACE1 Active Site Flap Leads to a Potent Inhibitor That Elicits Robust Brain Abeta Reduction in Rodents.,Wu YJ, Guernon J, Yang F, Snyder L, Shi J, Mcclure A, Rajamani R, Park H, Ng A, Lewis H, Chang C, Camac D, Toyn JH, Ahlijanian MK, Albright CF, Macor JE, Thompson LA ACS Med Chem Lett. 2016 Jan 11;7(3):271-6. doi: 10.1021/acsmedchemlett.5b00432., eCollection 2016 Mar 10. PMID:26985314[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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