1RT4

HIV-1 REVERSE TRANSCRIPTASE COMPLEXED WITH UC781


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.237 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structures of HIV-1 reverse transcriptase in complex with carboxanilide derivatives.

Ren, J.Esnouf, R.M.Hopkins, A.L.Warren, J.Balzarini, J.Stuart, D.I.Stammers, D.K.

(1998) Biochemistry 37: 14394-14403

  • DOI: 10.1021/bi981309m
  • Primary Citation of Related Structures:  
  • Also Cited By: 1DTT, 1DTQ

  • PubMed Abstract: 
  • The carboxanilides are nonnucleoside inhibitors (NNIs) of HIV-1 reverse transcriptase (RT), of potential clinical importance. The compounds differ in potency and in their retention of potency in the face of drug resistance mutations. Whereas UC-84, t ...

    The carboxanilides are nonnucleoside inhibitors (NNIs) of HIV-1 reverse transcriptase (RT), of potential clinical importance. The compounds differ in potency and in their retention of potency in the face of drug resistance mutations. Whereas UC-84, the prototype compound, only weakly inhibits many RTs bearing single point resistance mutations, inhibition by UC-781 is little affected. It has been proposed that UC-38 and UC-781 may form quaternary complexes with RT at a site other than the known binding pocket of other NNIs. X-ray crystal structures of four HIV-1 RT-carboxanilide complexes (UC-10, UC-38, UC-84, and UC-781) reported here reveal that all four inhibitors bind in the usual NNI site, forming binary 1:1 complexes with RT in the absence of substrates with the amide/thioamide bond in cis conformations. For all four complexes the anilide rings of the inhibitors overlap aromatic rings of many other NNIs bound to RT. In contrast, the second rings of UC-10, UC-84, and UC-781 do not bind in equivalent positions to those of other "two-ring" NNIs such as alpha-APA or HEPT derivatives. The binding modes most closely resemble that of the structurally dissimilar NNI, Cl-TIBO, with a common hydrogen bond between each carboxanilide NH- group and the main-chain carbonyl oxygen of Lys101. The binding modes differ slightly between the UC-10/UC-781 and UC-38/UC-84 pairs of compounds, apparently related to the shorter isopropylmethanoyl substituents of the anilide rings of UC-38/UC-84, which draws these rings closer to residues Tyr181 and Tyr188. This in turn explains the differences in the effect of mutated residues on the binding of these compounds.


    Related Citations: 
    • Continuous and Discontinuous Changes in the Unit Cell of HIV-1 Reverse Transcriptase Crystals on Dehydration
      Esnouf, R.M.,Ren, J.,Garman, E.F.,Somers, D.O.,Ross, C.K.,Jones, E.Y.,Stammers, D.K.,Stuart, D.I.
      (1998) Acta Crystallogr.,Sect.D 54: 938
    • 3'-Azido-3'-Deoxythymidine Drug Resistance Mutations in HIV-1 Reverse Transcriptase Can Induce Long Range Conformational Changes
      Ren, J.,Esnouf, R.M.,Hopkins, A.L.,Jones, E.Y.,Kirby, I.,Keeling, J.,Ross, C.K.,Larder, B.A.,Stuart, D.I.,Stammers, D.K.
      (1998) Proc.Natl.Acad.Sci.USA 95: 9518
    • Crystals of HIV-1 Reverse Transcriptase Diffracting to 2.2 A Resolution
      Stammers, D.K.,Somers, D.O.,Ross, C.K.,Kirby, I.,Ray, P.H.,Wilson, J.E.,Norman, M.,Ren, J.S.,Esnouf, R.M.,Garman, E.F.,Jones, E.Y.,Stuart, D.I.
      (1994) J.Mol.Biol. 242: 586
    • High Resolution Structures of HIV-1 RT from Four RT-Inhibitor Complexes
      Ren, J.,Esnouf, R.,Garman, E.,Somers, D.,Ross, C.,Kirby, I.,Keeling, J.,Darby, G.,Jones, Y.,Stuart, D.,Stammers, D.
      (1995) Nat.Struct.Mol.Biol. 2: 293
    • Mechanism of Inhibition of HIV-1 Reverse Transcriptase by Non-Nucleoside Inhibitors
      Esnouf, R.,Ren, J.,Ross, C.,Jones, Y.,Stammers, D.,Stuart, D.
      (1995) Nat.Struct.Mol.Biol. 2: 303
    • The Structure of HIV-1 Reverse Transcriptase Complexed with 9-Chloro-TIBO: Lessons for Inhibitor Design
      Ren, J.,Esnouf, R.,Hopkins, A.,Ross, C.,Jones, Y.,Stammers, D.,Stuart, D.
      (1995) Structure 3: 915
    • Unique Features in the Structure of the Complex between HIV-1 Reverse Transcriptase and the Bis(Heteroaryl)Piperazine (Bhap) U-90152 Explain Resistance Mutations for This Nonnucleoside Inhibitor
      Esnouf, R.M.,Ren, J.,Hopkins, A.L.,Ross, C.K.,Jones, E.Y.,Stammers, D.K.,Stuart, D.I.
      (1997) Proc.Natl.Acad.Sci.USA 94: 3984
    • Complexes of HIV-1 Reverse Transcriptase with Inhibitors of the HEPT Series Reveal Conformational Changes Relevant to the Design of Potent Non-Nucleoside Inhibitors
      Hopkins, A.L.,Ren, J.,Esnouf, R.M.,Willcox, B.E.,Jones, E.Y.,Ross, C.,Miyasaka, T.,Walker, R.T.,Tanaka, H.,Stammers, D.K.,Stuart, D.I.
      (1996) J.Med.Chem. 39: 1589


    Organizational Affiliation

    Laboratory of Molecular Biophysics, Oxford, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HIV-1 REVERSE TRANSCRIPTASE
A
560Human immunodeficiency virus type 1 group M subtype BMutation(s): 0 
Gene Names: gag-pol
Find proteins for P04585 (Human immunodeficiency virus type 1 group M subtype B)
Go to UniProtKB:  P04585
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
HIV-1 REVERSE TRANSCRIPTASE
B
440Human immunodeficiency virus type 1 group M subtype BMutation(s): 0 
Gene Names: gag-pol
Find proteins for P04585 (Human immunodeficiency virus type 1 group M subtype B)
Go to UniProtKB:  P04585
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

Download SDF File 
Download CCD File 
A
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
UC1
Query on UC1

Download SDF File 
Download CCD File 
A
2-METHYL-FURAN-3-CARBOTHIOIC ACID [4-CHLORO-3-(3-METHYL-BUT-2-ENYLOXY)-PHENYL]-AMIDE
UC781
C17 H18 Cl N O2 S
YZHIXLCGPOTQNB-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CSD
Query on CSD
A
L-PEPTIDE LINKINGC3 H7 N O4 SCYS
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
UC1EC50: 9 - 24 nM (99) BINDINGDB
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.237 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 140.400α = 90.00
b = 111.200β = 90.00
c = 73.400γ = 90.00
Software Package:
Software NamePurpose
X-PLORmodel building
DENZOdata reduction
X-PLORphasing
SCALEPACKdata scaling
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-07-29
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance