1DY4

CBH1 IN COMPLEX WITH S-PROPRANOLOL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Structural Basis for Enantiomer Binding and Separation of a Common Beta-Blocker: Crystal Structure of Cellobiohydrolase Cel7A with Bound (S)-Propranolol at 1.9 A Resolution

Stahlberg, J.Henriksson, H.Divne, C.Isaksson, R.Pettersson, G.Johansson, G.Jones, T.A.

(2001) J.Mol.Biol. 305: 79

  • DOI: 10.1006/jmbi.2000.4237

  • PubMed Abstract: 
  • Cellobiohydrolase Cel7A (previously called CBH 1), the major cellulase produced by the mould fungus Trichoderma reesei, has been successfully exploited as a chiral selector for separation of stereo-isomers of some important pharmaceutical compounds, ...

    Cellobiohydrolase Cel7A (previously called CBH 1), the major cellulase produced by the mould fungus Trichoderma reesei, has been successfully exploited as a chiral selector for separation of stereo-isomers of some important pharmaceutical compounds, e.g. adrenergic beta-blockers. Previous investigations, including experiments with catalytically deficient mutants of Cel7A, point unanimously to the active site as being responsible for discrimination of enantiomers. In this work the structural basis for enantioselectivity of basic drugs by Cel7A has been studied by X-ray crystallography. The catalytic domain of Cel7A was co-crystallised with the (S)-enantiomer of a common beta-blocker, propranolol, at pH 7, and the structure of the complex was determined and refined at 1. 9 A resolution. Indeed, (S)-propranolol binds at the active site, in glucosyl-binding subsites -1/+1. The catalytic residues Glu212 and Glu217 make tight salt links with the secondary amino group of (S)-propranolol. The oxygen atom attached to the chiral centre of (S)-propranolol forms hydrogen bonds to the nucleophile Glu212 O(epsilon1) and to Gln175 N(epsilon2), whereas the aromatic naphthyl moiety stacks with the indole ring of Trp376 in site +1. The bidentate charge interaction with the catalytic glutamate residues is apparently crucial, since no enantioselectivity has been obtained with the catalytically deficient mutants E212Q and E217Q. Activity inhibition experiments with wild-type Cel7A were performed in conditions close to those used for crystallisation. Competitive inhibition constants for (R)- and (S)-propranolol were determined at 220 microM and 44 microM, respectively, corresponding to binding free energies of 20 kJ/mol and 24 kJ/mol, respectively. The K(i) value for (R)-propranolol was 57-fold lower than the highest concentration, 12.5 mM, used in co-crystallisation experiments. Still several attempts to obtain a complex with the (R)-enantiomer have failed. By using cellobiose as a selective competing ligand, the retention of the enantiomers of propranolol on the chiral stationary phase (CSP) based on Cel7A mutant D214N were resolved into enantioselective and non- selective binding. The enantioselective binding was weaker for both enantiomers on D214N-CSP than on wild-type-CSP.


    Related Citations: 
    • High-Resolution Crystal Structures Reveal How a Cellulose Chain is Bound in the 50A Long Tunnel of Cellobiohydrolase I from Trichoderma Reesei
      Divne, C.,Stahlberg, J.,Teeri, T.T.,Jones, T.A.
      (1998) J.Mol.Biol. 275: 309
    • The Three-Dimensional Crystal Structure of the Catalytic Core of Cellobiohydrolase I from Trichoderma Reesei
      Divne, C.,Stahlberg, J.,Reinikainen, T.,Ruohonen, L.,Pettersson, G.,Knowles, J.K.,Teeri, T.T.,Jones, T.A.
      (1994) Science 265: 524


    Organizational Affiliation

    Department of Molecular Biology, University of Uppsala, Uppsala, SE-751 24, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EXOGLUCANASE 1
A
434Hypocrea jecorinaGene Names: cbh1
EC: 3.2.1.91
Find proteins for P62694 (Hypocrea jecorina)
Go to UniProtKB:  P62694
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SNP
Query on SNP

Download SDF File 
Download CCD File 
A
1-(ISOPROPYLAMINO)-3-(1-NAPHTHYLOXY)-2-PROPANOL
S-PROPRANOLOL
C16 H21 N O2
AQHHHDLHHXJYJD-AWEZNQCLSA-N
 Ligand Interaction
NAG
Query on NAG

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Download CCD File 
A
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
CO
Query on CO

Download SDF File 
Download CCD File 
A
COBALT (II) ION
Co
XLJKHNWPARRRJB-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PCA
Query on PCA
A
L-PEPTIDE LINKINGC5 H7 N O3GLU
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
SNPKi: 44000 nM BINDINGMOAD
SNPKi: 44000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.191 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 82.960α = 90.00
b = 83.110β = 90.00
c = 110.680γ = 90.00
Software Package:
Software NamePurpose
CNSphasing
SCALEPACKdata scaling
CNSrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-12-18
    Type: Initial release
  • Version 1.1: 2011-07-20
    Type: Other
  • Version 1.2: 2014-02-12
    Type: Source and taxonomy
  • Version 1.3: 2017-07-05
    Type: Data collection
  • Version 1.4: 2018-01-31
    Type: Derived calculations