Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 29693.83 
• Atom Count: 2072 
• Residue Count: 260 
• Unique protein chains: 1

3HKU

Human carbonic anhydrase II in complex with topiramate

• DOI: 10.2210/pdb3HKU/pdb

• Classification: LYASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli


• Deposited: 2009-05-25 Released: 2009-10-13 
• Deposition Author(s): Paul, B., Poulsen, S.-A., Hofmann, A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.8 Å
• R-Value Free: 0.198 
• R-Value Work: 0.152 

Literature

S-Glycosyl Primary Sulfonamides-A New Structural Class for Selective Inhibition of Cancer-Associated Carbonic Anhydrases

Lopez, M., Paul, B., Hofmann, A., Morizzi, J., Wu, Q., Charman, S.A., Innocenti, A., Vullo, D., Supuran, C.T., Poulsen, S.-A.

(2009) J.Med.Chem. --: --

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Carbonic anhydrase 2	A	260	Homo sapiens	Mutation(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
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ZN	A	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
TOR	A	[(3aS,5aR,8aR,8bS)-2,2,7,7-tetramethyltetrahydro-3aH-bis[1,3]dioxolo[4,5-b:4',5'-d]pyran-3a-yl]methyl sulfamate topiramate C12 H21 N O8 S KJADKKWYZYXHBB-XBWDGYHZSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
TOR	IC50: 5 - 2100 nM (100) BINDINGDB
TOR	Ki: 5 - 10000 nM (100) BINDINGDB
TOR	Kd: 13.8 - 290 nM (100) BINDINGDB
TOR	Ki: 5 nM PDBBIND

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.8 Å
• R-Value Free: 0.198 
• R-Value Work: 0.152 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 42.264	α = 90.00
b = 41.426	β = 104.59
c = 72.440	γ = 90.00

Software Package:

Software Name	Purpose
MOSFLM	data reduction
REFMAC	refinement
SCALA	data scaling
StructureStudio	data collection
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-05-25 
• Released Date: 2009-10-13 
• Deposition Author(s): Paul, B., Poulsen, S.-A., Hofmann, A.

Revision History 

• Version 1.0: 2009-10-13
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance