4RH2

Crystal structure of human carbonic anhydrase II in complex with 2-(6-hydroxy-3-Oxo-3H-xanthen-9-yl)-5-{3-1-(4-sulfamoyl-phenyl)-1h-[1,2,3]triazol-4-ylmethyl-thioureido}-benzoic acid

• PDB DOI: https://doi.org/10.2210/pdb4RH2/pdb

• Classification: LYASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2014-10-01 Released: 2015-11-11 
• Deposition Author(s): Ferraroni, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.30 Å
• R-Value Free: 0.171 
• R-Value Work: 0.156 
• R-Value Observed: 0.157 

Starting Model: experimental

Literature

New classes of carbonic anhydrase inhibitors

Ferraroni, M., Supuran, C.T., Carta, F., Bozdag, M., Scozzafava, A.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Macromolecule Content

• Total Structure Weight: 30.09 kDa 
• Atom Count: 2,620 
• Modelled Residue Count: 257 
• Deposited Residue Count: 260 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Carbonic anhydrase 2	A	260	Homo sapiens	Mutation(s): 0  Gene Names: CA2 EC: 4.2.1.1 (PDB Primary Data), 4.2.1.69 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P00918 (Homo sapiens) Explore P00918  Go to UniProtKB:  P00918
PHAROS:  P00918 GTEx:  ENSG00000104267

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
FC9	C [auth A]	2-(6-hydroxy-3-oxo-3H-xanthen-9-yl)-5-[({[1-(4-sulfamoylphenyl)-1H-1,2,3-triazol-4-yl]methyl}carbamothioyl)amino]benzoic acid C30 H22 N6 O7 S2 YKWZALQMWYUDGJ-UHFFFAOYSA-N
GOL	D [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N
ZN	B [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
FC9	BindingDB:  4RH2	Ki: 36 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.30 Å
• R-Value Free: 0.171 
• R-Value Work: 0.156 
• R-Value Observed: 0.157 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 42.362	α = 90
b = 41.282	β = 104.3
c = 72.138	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-11-11 
Deposition Author(s): Ferraroni, M.

Revision History  

• Version 1.0: 2015-11-11
  Type: Initial release
  
• Version 1.1: 2023-09-20
  Changes: Data collection, Database references, Derived calculations, Refinement description