Molecular Dynamics Simulations and Structure-Based Rational Design Lead to Allosteric HCV NS5B Polymerase Thumb Pocket 2 Inhibitor with Picomolar Cellular Replicon Potency
摘要:
The design and preliminary SAR of a new series of 1H-quinazolin-4-one (QAZ) allosteric HCV NS5B thumb pocket 2 (TP-2) inhibitors was recently reported. To support optimization efforts, a molecular dynamics (MD) based modeling workflow was implemented, providing information on QAZ binding interactions with NS5B. This approach predicted a small but critical ligand-binding induced movement of a protein backbone region which increases the pocket size and improves access to the backbone carbonyl groups of Val 494 and Pro 495. This localized backbone shift was consistent with key SAR results and was subsequently confirmed by X-ray crystallography. The MD protocol guided the design of inhibitors, exploiting novel H-bond interactions with the two backbone carbonyl groups, leading to the first thumb pocket 2 NS5B inhibitor with picomolar antiviral potency in genotype (gt) 1a and 1b replicons (EC50 = 120 and 110 pM, respectively) and with EC50 <= 80 nM against gt 2-6.
Compounds of formula
as well as pharmaceutically acceptable salts and esters thereof, wherein R
1
to R
4
have the significance given in claim
1
can be used in the form of pharmaceutical compositions.
[EN] PYRIDAZINE DERIVATIVES<br/>[FR] DERIVES DE PYRIDAZINE
申请人:HOFFMANN LA ROCHE
公开号:WO2007003521A2
公开(公告)日:2007-01-11
[EN] Compounds of formula (I) as well as pharmaceutically acceptable salts and esters thereof, wherein R1 to R4 have the significance given in claim 1 can be used in the form of pharmaceutical compositions. [FR] Cette invention concerne des composés représentés par la formule (I) ainsi que des sels et des esters pharmaceutiquement acceptables de ces composés, dans laquelle R1 à R4 sont comme indiqué dans la revendication. Ces composés peuvent s'utiliser sous forme de compositions pharmaceutiques.