2Q1B

Carbonic Anhydrase II in Complex with Saccharin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.146 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Saccharin Inhibits Carbonic Anhydrases: Possible Explanation for its Unpleasant Metallic Aftertaste.

Kohler, K.Hillebrecht, A.Schulze Wischeler, J.Innocenti, A.Heine, A.Supuran, C.T.Klebe, G.

(2007) Angew Chem Int Ed Engl 46: 7697-7699


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Carbonic anhydrase 2A260Homo sapiensMutation(s): 0 
Gene Names: CA2
EC: 4.2.1.1
UniProt & NIH Common Fund Data Resources
Find proteins for P00918 (Homo sapiens)
Explore P00918 
Go to UniProtKB:  P00918
PHAROS:  P00918
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00918
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HG
Query on HG

Download Ideal Coordinates CCD File 
D [auth A]MERCURY (II) ION
Hg
BQPIGGFYSBELGY-UHFFFAOYSA-N
 Ligand Interaction
LSA
Query on LSA

Download Ideal Coordinates CCD File 
F [auth A]1,2-BENZISOTHIAZOL-3(2H)-ONE 1,1-DIOXIDE
C7 H5 N O3 S
CVHZOJJKTDOEJC-UHFFFAOYSA-N
 Ligand Interaction
BEZ
Query on BEZ

Download Ideal Coordinates CCD File 
E [auth A]BENZOIC ACID
C7 H6 O2
WPYMKLBDIGXBTP-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
B [auth A],
C [auth A]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
LSA BindingDB:  2Q1B Ki: min: 5950, max: 5.95e+6 (nM) from 4 assay(s)
Binding MOAD:  2Q1B Ki: 5950 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.216 
  • R-Value Work: 0.146 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.22α = 90
b = 41.61β = 104.44
c = 72.16γ = 90
Software Package:
Software NamePurpose
SHELXmodel building
SHELXL-97refinement
CrystalCleardata collection
HKL-2000data reduction
HKL-2000data scaling
CNSphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-09-04
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance