Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 29560.67 
• Atom Count: 2137 
• Residue Count: 258 
• Unique protein chains: 1

5LJQ

Crystal structure of human carbonic anhydrase II in complex with the 4-(4-(phenoxymethyl)-1H-1,2,3-triazol-1-yl)benzenesulfonamide inhibitor

• DOI: 10.2210/pdb5LJQ/pdb

• Classification: LYASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21


• Deposited: 2016-07-19 Released: 2017-06-21 
• Deposition Author(s): Ferraroni, M., Supuran, C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.05 Å
• R-Value Free: 0.148 
• R-Value Work: 0.134 

Literature

Benzenesulfonamides Incorporating Flexible Triazole Moieties Are Highly Effective Carbonic Anhydrase Inhibitors: Synthesis and Kinetic, Crystallographic, Computational, and Intraocular Pressure Lowering Investigations.

Nocentini, A., Ferraroni, M., Carta, F., Ceruso, M., Gratteri, P., Lanzi, C., Masini, E., Supuran, C.T.

(2016) J. Med. Chem. 59: 10692-10704

• PubMed: 27933963 
• DOI: 10.1021/acs.jmedchem.6b01389
• Primary Citation of Related Structures:  
  5LJT


• PubMed Abstract: 
  

Herein we report the synthesis of two series of benzenesulfonamide containing compounds that incorporate the phenyl-1,2,3-triazole moieties. We explored the insertion of appropriate linkers, such as ether, thioether, and amino type, into the inner section of the molecules with the intent to confer additional flexibility. All obtained compounds were screened in vitro as inhibitors of the physiologically relevant human (h) isoforms of the metalloenzyme carbonic anhydrase (CA, EC 4.2.1.1). Many of them were low nanomolar or subnanomolar hCA II, IX, and XII inhibitors, whereas they did not potently inhibit hCA I. Computational and X-ray crystallographic studies of the enzyme-inhibitor adducts helped us to rationalize the obtained results. Some of the sulfonamides reported here showed significant intraocular pressure lowering activity in an animal model of glaucoma.

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Organizational Affiliation: 

Università degli Studi di Firenze , Neurofarba Department., Sezione di Scienze Farmaceutiche, Via Ugo Schiff 6, 50019 Sesto Fiorentino (Florence), Italy.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Carbonic anhydrase 2	A	258	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 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ZN	A	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
GOL	A	GLYCEROL GLYCERIN; PROPANE-1,2,3-TRIOL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
ANV	A	1-[4-[azanyl-bis(oxidanyl)-$l^{4}-sulfanyl]phenyl]-4-(phenoxymethyl)-1,2,3-triazole C15 H16 N4 O3 S SJPPVLBPVQBKDK-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
ANV	Ki: 1 nM BINDINGMOAD

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.05 Å
• R-Value Free: 0.148 
• R-Value Work: 0.134 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 42.371	α = 90.00
b = 41.445	β = 104.45
c = 72.216	γ = 90.00

Software Package:

Software Name	Purpose
XSCALE	data scaling
PDB_EXTRACT	data extraction
REFMAC	phasing
REFMAC	refinement
XDS	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2016-07-19 
• Released Date: 2017-06-21 
• Deposition Author(s): Ferraroni, M., Supuran, C.

Revision History 

• Version 1.0: 2017-06-21
  Type: Initial release