1A9M

G48H MUTANT OF HIV-1 PROTEASE IN COMPLEX WITH A PEPTIDIC INHIBITOR U-89360E


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Work: 0.185 
  • R-Value Observed: 0.185 

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This is version 1.2 of the entry. See complete history


Literature

Structure of a G48H mutant of HIV-1 protease explains how glycine-48 replacements produce mutants resistant to inhibitor drugs.

Hong, L.Zhang, X.J.Foundling, S.Hartsuck, J.A.Tang, J.

(1997) FEBS Lett 420: 11-16

  • DOI: 10.1016/s0014-5793(97)01477-4
  • Primary Citation of Related Structures:  
    1A9M

  • PubMed Abstract: 
  • The crystal structure of human immunodeficiency virus type 1 (HIV-1) protease mutant G48H with peptidic inhibitor U-89360E is described. Comparison with wild-type protease-inhibitor complex shows that mutation of flap residue 48 to histidine allows s ...

    The crystal structure of human immunodeficiency virus type 1 (HIV-1) protease mutant G48H with peptidic inhibitor U-89360E is described. Comparison with wild-type protease-inhibitor complex shows that mutation of flap residue 48 to histidine allows stabilizing van der Waals contacts between the side chains of His48 and Phe53 as well as between His48 and the P2' and P3' inhibitor subsites. The flap region is less mobile than in the wild-type enzyme. A model of saquinavir-resistant mutant protease G48V in complex with saquinavir predicts interactions similar to those found in the G48H crystal. Energetic calculations confirm the similarity of the His48 and Val48 interactions.


    Organizational Affiliation

    Protein Studies Program, Oklahoma Medical Research Foundation, Oklahoma City 73104, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HIV-1 PROTEASEAB99Human immunodeficiency virus 1Mutation(s): 1 
EC: 3.4.23.16 (UniProt), 2.7.7.49 (UniProt), 2.7.7.7 (UniProt), 3.1.26.13 (UniProt), 3.1.13.2 (UniProt), 2.7.7 (UniProt), 3.1 (UniProt)
Find proteins for P03366 (Human immunodeficiency virus type 1 group M subtype B (isolate BH10))
Explore P03366 
Go to UniProtKB:  P03366
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
U0E
Query on U0E

Download CCD File 
B
N-[[1-[N-ACETAMIDYL]-[1-CYCLOHEXYLMETHYL-2-HYDROXY-4-ISOPROPYL]-BUT-4-YL]-CARBONYL]-GLUTAMINYL-ARGINYL-AMIDE
C28 H52 N8 O6
XTOQWMLQBSGKOK-VUBDRERZSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
U0EKi :  119   nM  PDBBind
U0EKi:  119   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Work: 0.185 
  • R-Value Observed: 0.185 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.5α = 90
b = 88.2β = 90
c = 94.2γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
SAINTdata reduction
SAINTdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-06-17
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance