1G2K

HIV-1 PROTEASE WITH CYCLIC SULFAMIDE INHIBITOR, AHA047


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.240 
  • R-Value Observed: 0.200 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Synthesis and comparative molecular field analysis (CoMFA) of symmetric and nonsymmetric cyclic sulfamide HIV-1 protease inhibitors.

Schaal, W.Karlsson, A.Ahlsen, G.Lindberg, J.Andersson, H.O.Danielson, U.H.Classon, B.Unge, T.Samuelsson, B.Hulten, J.Hallberg, A.Karlen, A.

(2001) J Med Chem 44: 155-169

  • DOI: https://doi.org/10.1021/jm001024j
  • Primary Citation of Related Structures:  
    1G2K, 1G35

  • PubMed Abstract: 

    We have previously reported on the unexpected flipped conformation in the cyclic sulfamide class of inhibitors. An attempt to induce a symmetric binding conformation by introducing P2/P2' substituents foreseen to bind preferentially in the S2/S2' subsite was unsuccessful. On the basis of the flipped conformation we anticipated that nonsymmetric sulfamide inhibitors, with P2/P2' side chains modified individually for the S1' and S2 subsites, should be more potent than the corresponding symmetric analogues. To test this hypothesis, a set of 18 cyclic sulfamide inhibitors (11 nonsymmetric and 7 symmetric) with different P2/P2' substituents was prepared and evaluated in an enzyme assay. To rationalize the structure-activity relationship (SAR) and enable the alignment of the nonsymmetric inhibitors, i.e., which of the P2/P2' substituents of the nonsymmetric inhibitors interact with which subsite, a CoMFA study was performed. The CoMFA model, constructed from the 18 inhibitors in this study along with seven inhibitors from previous work by our group, has successfully been used to rationalize the SAR of the cyclic sulfamide inhibitors. Furthermore, from the information presented herein, the SAR of the cyclic sulfamide class of inhibitors seems to differ from the SAR of the related cyclic urea inhibitors reported by DuPont and DuPont-Merck.


  • Organizational Affiliation

    Department of Organic Pharmaceutical Chemistry, Uppsala Biomedical Centre, Uppsala University, Box 574, SE-751 23 Uppsala, Sweden.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PROTEASE RETROPEPSIN
A, B
99Human immunodeficiency virus 1Mutation(s): 0 
EC: 3.4.23.16
UniProt
Find proteins for P04587 (Human immunodeficiency virus type 1 group M subtype B (isolate BH5))
Explore P04587 
Go to UniProtKB:  P04587
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04587
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
NM1
Query on NM1

Download Ideal Coordinates CCD File 
C [auth B]3-(7-BENZYL-4,5-DIHYDROXY-1,1-DIOXO-3,6-BIS-PHENOXYMETHYL-1L6-[1,2,7]THIADIAZEPAN-2-YLMETHYL)-N-METHYL-BENZAMIDE
C34 H37 N3 O7 S
CGBDAHCDSVOMCF-FYZVQMPESA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
NM1 PDBBind:  1G2K Ki: 11 (nM) from 1 assay(s)
BindingDB:  1G2K Ki: min: 10.1, max: 11 (nM) from 2 assay(s)
Kd: 577 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.240 
  • R-Value Observed: 0.200 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.508α = 90
b = 86.832β = 90
c = 46.648γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-06-01
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-09
    Changes: Data collection, Database references, Derived calculations, Refinement description