4K0Z

Structure of HCAIX mimic (HCAII with 5 mutations in active site) in complex with methazolamide

• PDB DOI: https://doi.org/10.2210/pdb4K0Z/pdb

• Classification: LYASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2013-04-04 Released: 2014-04-09 
• Deposition Author(s): Biswas, S., McKenna, R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.188 
• R-Value Work: 0.145 
• R-Value Observed: 0.147 

Literature

Developing isoform specific inhibitors for hCAIX using CAIX mimic

Biswas, S., West, D., Pinard, M., McKenna, R.

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: 29.8 kDa 
• Atom Count: 2,423 
• Modelled Residue Count: 258 
• Deposited Residue Count: 258 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Carbonic anhydrase 2	A	258	Homo sapiens	Mutation(s): 5  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 GTEx:  ENSG00000104267

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MZM	I [auth A]	N-(3-methyl-5-sulfamoyl-1,3,4-thiadiazol-2(3H)-ylidene)acetamide C5 H8 N4 O3 S2 FLOSMHQXBMRNHR-DAXSKMNVSA-N
DMS	D [auth A], E [auth A], F [auth A], G [auth A], H [auth A]	DIMETHYL SULFOXIDE C2 H6 O S IAZDPXIOMUYVGZ-UHFFFAOYSA-N
ZN	B [auth A], C [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
MZM	BindingDB:  4K0Z	Ki: min: 9, max: 1.40e+4 (nM) from 4 assay(s)
		IC50: min: 4.8, max: 21 (nM) from 4 assay(s)
		EC50: 40 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.188 
• R-Value Work: 0.145 
• R-Value Observed: 0.147 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 41.964	α = 90
b = 74.481	β = 90
c = 75.922	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
PHASER	phasing
PHENIX	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-04-09 
Deposition Author(s): Biswas, S., McKenna, R.

Revision History  

• Version 1.0: 2014-04-09
  Type: Initial release
  
• Version 1.1: 2023-09-20
  Changes: Data collection, Database references, Derived calculations, Refinement description