3LKH | pdb_00003lkh

Inhibitors of Hepatitis C Virus Polymerase: Synthesis and Characterization of Novel 6-Fluoro-N-[2-Hydroxy-1(S)-Benzamides


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 
    0.241 (Depositor) 
  • R-Value Work: 
    0.184 (Depositor), 0.186 (DCC) 
  • R-Value Observed: 
    0.187 (Depositor) 

wwPDB Validation 3D Report Full Report

Validation slider image for 3LKH

Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history

Literature

Inhibitors of hepatitis C virus polymerase: synthesis and characterization of novel 2-oxy-6-fluoro-N-((S)-1-hydroxy-3-phenylpropan-2-yl)-benzamides.

Cheng, C.C.Shipps, G.W.Yang, Z.Kawahata, N.Lesburg, C.A.Duca, J.S.Bandouveres, J.Bracken, J.D.Jiang, C.K.Agrawal, S.Ferrari, E.Huang, H.C.

(2010) Bioorg Med Chem Lett 20: 2119-2124

  • DOI: https://doi.org/10.1016/j.bmcl.2010.02.054
  • Primary Citation Related Structures: 
    3LKH

  • PubMed Abstract: 

    SAR exploration from an initial hit, (S)-N-(2-cyclohexenylethyl)-2-fluoro-6-(2-(1-hydroxy-3-phenylpropan-2-ylamino)-2-oxoethoxy)benzamide (1), identified using our proprietary automated ligand identification system (ALIS),(1) has led to a novel series of selective hepatitis C virus (HCV) NS5B polymerase inhibitors with improved in vitro potency as exemplified by (S)-2-fluoro-6-(2-(1-hydroxy-3-phenylpropan-2-ylamino)-2-oxoethoxy)-N-isopentyl-N-methylbenzamidecarboxamide (41) (IC(50)=0.5 microM). The crystal structure of an analogue (44) was solved and provided rationalization of the SAR of this series, which binds in a distinct manner in the palm domain of NS5B, consistent with biochemical analysis using enzyme mutant variants. These data warrant further lead optimization efforts on this novel series of non-nucleoside inhibitors targeting the HCV polymerase.


  • Organizational Affiliation
    • Department of Lead Discovery, Merck Research Laboratories, 320 Bent Street, Cambridge, MA 02141, United States. cccheng@alum.mit.edu

Macromolecule Content 

  • Total Structure Weight: 129.22 kDa 
  • Atom Count: 9,891 
  • Modeled Residue Count: 1,112 
  • Deposited Residue Count: 1,152 
  • Unique protein chains: 1

Macromolecules

Find similar proteins by:|  3D Structure
Entity ID: 1
MoleculeChains  Sequence LengthOrganismDetailsImage
RNA-directed RNA polymerase
A, B
576Orthohepacivirus hominisMutation(s): 0 
Gene Names: NS5B
EC: 2.7.7.48
UniProt
Find proteins for O92972 (Hepatitis C virus genotype 1b (strain HC-J4))
Explore O92972 
Go to UniProtKB:  O92972
Entity Groups
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO92972
Sequence Annotations
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Reference Sequence

Small Molecules

Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
LT6

Query on LT6



Download:Ideal Coordinates CCD File
C [auth A],
D [auth B]
2-(2-{[(1S)-1-benzyl-2-hydroxyethyl]amino}-2-oxoethoxy)-N-butyl-6-fluoro-N-methylbenzamide
C23 H29 F N2 O4
XFQXPLKWVDQXAD-SFHVURJKSA-N

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free:  0.241 (Depositor) 
  • R-Value Work:  0.184 (Depositor), 0.186 (DCC) 
  • R-Value Observed: 0.187 (Depositor) 
Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.7α = 90
b = 107.068β = 90
c = 134.243γ = 90
Software Package:
Software NamePurpose
CrystalCleardata collection
BUSTER-TNTrefinement
CrystalCleardata reduction
CrystalCleardata scaling
BUSTER-TNTphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-03-23
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2024-10-30
    Changes: Data collection, Database references, Derived calculations, Structure summary