1YTI

SIV PROTEASE CRYSTALLIZED WITH PEPTIDE PRODUCT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Three-dimensional structures of HIV-1 and SIV protease product complexes.

Rose, R.B.Craik, C.S.Douglas, N.L.Stroud, R.M.

(1996) Biochemistry 35: 12933-12944

  • DOI: 10.1021/bi9612733
  • Primary Citation of Related Structures:  1YTG, 1YTH, 1YTJ

  • PubMed Abstract: 
  • Strain is eliminated as a factor in hydrolysis of the scissile peptide bond by human immunodeficiency virus (HIV)-1 and simian immunodeficiency virus (SIV), based on the first eight complexes of products of hydrolysis with the enzymes. The carboxyl g ...

    Strain is eliminated as a factor in hydrolysis of the scissile peptide bond by human immunodeficiency virus (HIV)-1 and simian immunodeficiency virus (SIV), based on the first eight complexes of products of hydrolysis with the enzymes. The carboxyl group generated at the scissile bond interacts with both catalytic aspartic acids. The structures directly suggest the interactions of the gemdiol intermediate with the active site. Based on the structures, the nucleophilic water is displaced stereospecifically by substrate binding toward one catalytic aspartic acid, while the scissile carbonyl becomes hydrogen bonded to the other catalytic aspartic acid in position for hydrolysis. Crystal structures for two N-terminal (P) products and two C-terminal (Q) products provide unambiguous density for the ligands at 2.2-2.6 A resolution and 17-21% R factors. The N-terminal product, Ac-S-L-N-F/, overlaps closely with the N-terminal sequences of peptidomimetic inhibitors bound to the protease. Comparison of the two C-terminal products, /F-L-E-K and /F(NO2)-E-A-Nle-S, indicates that the P2' residue is highly constrained, while the positioning of the P1' and P3' residues are sequence dependent.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, University of California, San Francisco 94143-0448, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SIV PROTEASE
A
99Simian immunodeficiency virus (isolate Mm142-83)Gene Names: gag-pol
EC: 3.4.23.16, 3.1.-.-, 2.7.7.49, 2.7.7.7, 3.1.26.13, 2.7.7.-, 3.1.13.2
Find proteins for P05896 (Simian immunodeficiency virus (isolate Mm142-83))
Go to UniProtKB:  P05896
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PEPTIDE PRODUCT
I
4N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.211 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 63.700α = 90.00
b = 32.500β = 90.00
c = 97.700γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
DENZOdata reduction
X-PLORmodel building
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-03-12
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance