Experimental Data Snapshot

  • Resolution: 2.05 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.165 

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Locating interaction sites on proteins: the crystal structure of thermolysin soaked in 2% to 100% isopropanol.

English, A.C.Done, S.H.Caves, L.S.Groom, C.R.Hubbard, R.E.

(1999) Proteins 37: 628-640

  • Primary Citation of Related Structures:  
    1TLI, 1TLX, 2TLI, 2TLX, 3TLI, 4TLI, 5TLI, 6TLI, 7TLI, 8TLI

  • PubMed Abstract: 

    Multiple-solvent crystal structure determination (MSCS) allows the position and orientation of bound solvent fragments to be identified by determining the structure of protein crystals soaked in organic solvents. We have extended this technique by the determination of high-resolution crystal structures of thermolysin (TLN), generated from crystals soaked in 2% to 100% isopropanol. The procedure causes only minor changes to the conformation of the protein, and an increasing number of isopropanol interaction sites could be identified as the solvent concentration is increased. Isopropanol occupies all four of the main subsites in the active site, although this was only observed at very high concentrations of isopropanol for three of the four subsites. Analysis of the isopropanol positions shows little correlation with interaction energy computed using a molecular mechanics force field, but the experimentally determined positions of isopropanol are consistent with the structures of known protein-ligand complexes of TLN.

  • Organizational Affiliation

    Department of Chemistry, University of York, Heslington, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
THERMOLYSIN316Bacillus thermoproteolyticusMutation(s): 0 
Find proteins for P00800 (Bacillus thermoproteolyticus)
Explore P00800 
Go to UniProtKB:  P00800
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00800
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.05 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.165 
  • Space Group: P 61 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.93α = 90
b = 93.93β = 90
c = 130.91γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2000-02-18
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations, Other