4KNI | pdb_00004kni

Crystal structure of human carbonic anhydrase isozyme II with 2-Chloro-4-{[(4,6-dimethylpyrimidin-2-yl)sulfanyl]acetyl}benzenesulfonamide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 
    0.225 (Depositor), 0.224 (DCC) 
  • R-Value Work: 
    0.163 (Depositor), 0.162 (DCC) 
  • R-Value Observed: 
    0.169 (Depositor) 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history

Literature

Benzenesulfonamides with pyrimidine moiety as inhibitors of human carbonic anhydrases I, II, VI, VII, XII, and XIII

Capkauskaite, E.Zubriene, A.Smirnov, A.Torresan, J.Kisonaite, M.Kazokaite, J.Gylyte, J.Michailoviene, V.Jogaite, V.Manakova, E.Grazulis, S.Tumkevicius, S.Matulis, D.

(2013) Bioorg Med Chem 21: 6937-6947

  • DOI: https://doi.org/10.1016/j.bmc.2013.09.029
  • Primary Citation Related Structures: 
    4KNI, 4KNJ, 4KNM, 4KNN, 4KP5, 4KP8

  • PubMed Abstract: 

    Two groups of benzenesulfonamide derivatives, bearing pyrimidine moieties, were designed and synthesized as inhibitors of carbonic anhydrases (CA). Their binding affinities to six recombinant human CA isoforms I, II, VI, VII, XII, and XIII were determined by the thermal shift assay (TSA). The binding of several inhibitors was measured by isothermal titration calorimetry (ITC). Direct demonstration of compound inhibition was achieved by determining the inhibition constant by stopped-flow CO2 hydration assay. The most potent compounds demonstrated selectivity towards isoform I and affinities of 0.5 nM. The crystal structures of selected compounds in complex with CA II, XII, and XIII were determined to atomic resolution. Compounds described here were compared with previously published pyrimidinebenzenesulfonamides.(1) Systematic structure-activity analysis of 40 compound interactions with six isoforms yields clues for the design of compounds with greater affinities and selectivities towards target CA isoforms.


  • Organizational Affiliation
    • Department of Biothermodynamics and Drug Design, Institute of Biotechnology, Vilnius University, Graičiūno 8, Vilnius LT-02241, Lithuania.

Macromolecule Content 

  • Total Structure Weight: 30.08 kDa 
  • Atom Count: 2,351 
  • Modeled Residue Count: 257 
  • Deposited Residue Count: 260 
  • Unique protein chains: 1

Macromolecules

Find similar proteins by:|  3D Structure
Entity ID: 1
MoleculeChains  Sequence LengthOrganismDetailsImage
Carbonic anhydrase 2260Homo sapiensMutation(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 
Entity Groups
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00918
Sequence Annotations
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Reference Sequence

Small Molecules

Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
E1E

Query on E1E



Download:Ideal Coordinates CCD File
F [auth A]2-chloro-4-{[(4,6-dimethylpyrimidin-2-yl)sulfanyl]acetyl}benzenesulfonamide
C14 H14 Cl N3 O3 S2
XWPREILQIYDJMT-UHFFFAOYSA-N
MES

Query on MES



Download:Ideal Coordinates CCD File
D [auth A]2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
DMS

Query on DMS



Download:Ideal Coordinates CCD File
C [auth A],
E [auth A]
DIMETHYL SULFOXIDE
C2 H6 O S
IAZDPXIOMUYVGZ-UHFFFAOYSA-N
ZN

Query on ZN



Download:Ideal Coordinates CCD File
B [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
E1E BindingDB:  4KNI Ki: 11 (nM) from 1 assay(s)
Kd: min: 15, max: 17 (nM) from 2 assay(s)

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free:  0.225 (Depositor), 0.224 (DCC) 
  • R-Value Work:  0.163 (Depositor), 0.162 (DCC) 
  • R-Value Observed: 0.169 (Depositor) 
Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.084α = 90
b = 40.998β = 104.11
c = 71.79γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
PDB_EXTRACTdata extraction
DNAdata collection
MOLREPphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-11-06
    Type: Initial release
  • Version 1.1: 2023-11-08
    Changes: Data collection, Database references, Derived calculations, Refinement description