2Q5K

Crystal structure of lopinavir bound to wild type HIV-1 protease

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 

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Literature

Design and Synthesis of HIV-1 Protease Inhibitors Incorporating Oxazolidinones as P2/P2' Ligands in Pseudosymmetric Dipeptide Isosteres.

Reddy, G.S., Ali, A., Nalam, M.N., Anjum, S.G., Cao, H., Nathans, R.S., Schiffer, C.A., Rana, T.M.

(2007) J Med Chem 50: 4316-4328

  • DOI: 10.1021/jm070284z
  • Primary Citation of Related Structures:  
    2Q54, 2Q55, 2Q5K

  • PubMed Abstract: 

    • A series of novel HIV-1 protease inhibitors based on two pseudosymmetric dipeptide isosteres have been synthesized and evaluated. The inhibitors were designed by incorporating N-phenyloxazolidinone-5-carboxamides into the hydroxyethylene and (hydroxyethyl)hydrazine dipeptide isosteres as P2 and P2' ligands ...

    A series of novel HIV-1 protease inhibitors based on two pseudosymmetric dipeptide isosteres have been synthesized and evaluated. The inhibitors were designed by incorporating N-phenyloxazolidinone-5-carboxamides into the hydroxyethylene and (hydroxyethyl)hydrazine dipeptide isosteres as P2 and P2' ligands. Compounds with (S)-phenyloxazolidinones attached at a position proximal to the central hydroxyl group showed low nM inhibitory activities against wild-type HIV-1 protease. Selected compounds were further evaluated for their inhibitory activities against a panel of multidrug-resistant protease variants and for their antiviral potencies in MT-4 cells. The crystal structures of lopinavir (LPV) and two new inhibitors containing phenyloxazolidinone-based ligands in complex with wild-type HIV-1 protease have been determined. A comparison of the inhibitor-protease structures with the LPV-protease structure provides valuable insight into the binding mode of the new inhibitors to the protease enzyme. Based on the crystal structures and knowledge of structure-activity relationships, new inhibitors can be designed with enhanced enzyme inhibitory and antiviral potencies.

    Organizational Affiliation: 

    Chemical Biology Program and Department of Biochemistry and Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ProteaseA, B99Human immunodeficiency virus 1Mutation(s): 1 
Gene Names: pol
UniProt
Find proteins for O38710 (Human immunodeficiency virus 1)
Explore O38710 
Go to UniProtKB:  O38710
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO38710
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
AB1
Query on AB1
Download Ideal Coordinates CCD File 
F [auth A]N-{1-BENZYL-4-[2-(2,6-DIMETHYL-PHENOXY)-ACETYLAMINO]-3-HYDROXY-5-PHENYL-PENTYL}-3-METHYL-2-(2-OXO-TETRAHYDRO-PYRIMIDIN-1-YL)-BUTYRAMIDE
C37 H48 N4 O5
KJHKTHWMRKYKJE-SUGCFTRWSA-N		 Ligand Interaction
PO4
Query on PO4
Download Ideal Coordinates CCD File 
C [auth A],
D [auth A],
E [auth A],
G [auth B]		PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
AB1 BindingDB:  2Q5K Ki: min: 5.00e-3, max: 16 (nM) from 7 assay(s)
Kd: 1.30e-3 (nM) from 1 assay(s)
IC50: min: 2.5, max: 25 (nM) from 2 assay(s)
EC50: 1160 (nM) from 1 assay(s)
PDBBind:  2Q5K Ki: 5.00e-3 (nM) from 1 assay(s)
Binding MOAD:  2Q5K Ki: 5.00e-3 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.194 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.343α = 90
b = 58.043β = 90
c = 61.133γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-09-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Derived calculations, Refinement description, Version format compliance
  • Version 1.2: 2017-10-18
    Changes: Refinement description
  • Version 1.3: 2021-10-20
    Changes: Database references, Derived calculations, Structure summary