1SIV

THREE-DIMENSIONAL STRUCTURE OF A SIV PROTEASE(SLASH)INHIBITOR COMPLEX. IMPLICATIONS FOR THE DESIGN OF HIV-1 AND HIV-2 PROTEASE INHIBITORS

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.189 
  • R-Value Observed: 0.189 

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This is version 1.4 of the entry. See complete history. 


Literature

Three-dimensional structure of a simian immunodeficiency virus protease/inhibitor complex. Implications for the design of human immunodeficiency virus type 1 and 2 protease inhibitors.

Zhao, B., Winborne, E., Minnich, M.D., Culp, J.S., Debouck, C., Abdel-Meguid, S.S.

(1993) Biochemistry 32: 13054-13060

  • DOI: 10.1021/bi00211a015
  • Primary Citation of Related Structures:  
    1SIV

  • PubMed Abstract: 

    • Simian immunodeficiency virus (SIV) proteins have considerable amino acid sequence homology to those from human immunodeficiency virus (HIV); thus monkeys are considered useful models for the preclinical evaluation of acquired immune deficiency syndrome (AIDS) therapeutics ...

    Simian immunodeficiency virus (SIV) proteins have considerable amino acid sequence homology to those from human immunodeficiency virus (HIV); thus monkeys are considered useful models for the preclinical evaluation of acquired immune deficiency syndrome (AIDS) therapeutics. We have crystallized and determined the three-dimensional structure of SIV protease bound to the hydroxyethylene isostere inhibitor SKF107457. Crystals of the complex were grown from 25-32% saturated sodium chloride, by the hanging drop method of vapor diffusion. They belong to the orthorhombic space group I222, with a = 46.3 A, b = 101.5 A, and c = 118.8 A. The structure has been determined at 2.5-A resolution by molecular replacement and refined to a crystallographic discrepancy factor, R (= sigma parallel Fo magnitude of - magnitude of Fc parallel/sigma magnitude of Fo magnitude of), of 0.189. The overall structure of the complex is very similar to previously reported structures of HIV-1 protease bound to inhibitors. The inhibitor is bound in a conformation that is almost identical to that found for the same inhibitor bound to HIV-1 protease, except for an overall translation of the inhibitor, varying along the backbone atoms from about 1.0 A at the termini to about 0.5 A around the scissile bond surrogate. The structures of the SIV and HIV-1 proteins vary significantly only in three surface loops composed of amino acids 15-20, 34-45, and 65-70. Superposition of the 1188 protein backbone atoms from the two structures gives an rms deviation of 1.0 A; this number is reduced to 0.6 A when atoms from the three surface loops are eliminated from the rms calculation.(ABSTRACT TRUNCATED AT 250 WORDS)

    Organizational Affiliation: 

    Department of Macromolecular Sciences, SmithKline Beecham, King of Prussia, Pennsylvania 19406.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SIV PROTEASEA, B99Simian immunodeficiency virusMutation(s): 0 
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)
UniProt
Find proteins for P05896 (Simian immunodeficiency virus (isolate Mm142-83))
Explore P05896 
Go to UniProtKB:  P05896
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP05896
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PSI
Query on PSI
Download Ideal Coordinates CCD File 
C [auth B]methyl N-{(4S,5S)-5-[(L-alanyl-L-alanyl)amino]-4-hydroxy-6-phenylhexanoyl}-L-valyl-L-valinate
C29 H47 N5 O7
IUDCAKKZLXFOQA-QJAPXLAMSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
PSI Binding MOAD:  1SIV Ki: 8.4 (nM) from 1 assay(s)
Biologically Interesting Molecules (External Reference) 1 Unique
Entity ID: 2
IDChainsNameType/Class2D Diagram3D Interactions
PRD_000320 (PSI)
Query on PRD_000320		C [auth B]Ala-Ala-Phe.psi.[CH(OH)CH2]Gly-Val-Val-OCH3Peptide-like / Enzyme inhibitor Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.189 
  • R-Value Observed: 0.189 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.3α = 90
b = 101.5β = 90
c = 118.8γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1994-01-31
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.3: 2012-12-12
    Changes: Other
  • Version 1.4: 2017-11-29
    Changes: Derived calculations, Other