5JGT

Human carbonic anhydrase II (F131Y/L198A) complexed with 1,3-thiazole-2-sulfonamide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.1 Å
  • R-Value Free: 0.138 
  • R-Value Work: 0.119 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Water-Restructuring Mutations Can Reverse the Thermodynamic Signature of Ligand Binding to Human Carbonic Anhydrase.

Fox, J.M.Kang, K.Sastry, M.Sherman, W.Sankaran, B.Zwart, P.H.Whitesides, G.M.

(2017) Angew. Chem. Int. Ed. Engl. 56: 3833-3837

  • DOI: 10.1002/anie.201609409
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • This study uses mutants of human carbonic anhydrase (HCAII) to examine how changes in the organization of water within a binding pocket can alter the thermodynamics of protein-ligand association. Results from calorimetric, crystallographic, and theor ...

    This study uses mutants of human carbonic anhydrase (HCAII) to examine how changes in the organization of water within a binding pocket can alter the thermodynamics of protein-ligand association. Results from calorimetric, crystallographic, and theoretical analyses suggest that most mutations strengthen networks of water-mediated hydrogen bonds and reduce binding affinity by increasing the enthalpic cost and, to a lesser extent, the entropic benefit of rearranging those networks during binding. The organization of water within a binding pocket can thus determine whether the hydrophobic interactions in which it engages are enthalpy-driven or entropy-driven. Our findings highlight a possible asymmetry in protein-ligand association by suggesting that, within the confines of the binding pocket of HCAII, binding events associated with enthalpically favorable rearrangements of water are stronger than those associated with entropically favorable ones.


    Organizational Affiliation

    Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, MA, 02138, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carbonic anhydrase 2
B
259Homo sapiensMutation(s): 0 
Gene Names: CA2
EC: 4.2.1.1
Find proteins for P00918 (Homo sapiens)
Go to Gene View: CA2
Go to UniProtKB:  P00918
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
EVI
Query on EVI

Download SDF File 
Download CCD File 
B
1,3-thiazole-2-sulfonamide
C3 H4 N2 O2 S2
WKXVETMYCFRGET-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.1 Å
  • R-Value Free: 0.138 
  • R-Value Work: 0.119 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 42.410α = 90.00
b = 41.470β = 104.60
c = 72.390γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
xia2data reduction
PHASERphasing
xia2data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-01-11
    Type: Initial release
  • Version 1.1: 2017-03-15
    Type: Database references
  • Version 1.2: 2017-03-29
    Type: Database references