8QHG | pdb_00008qhg

Human Carbonic Anhydrase IX mimic in complex with Lasamide (2,4-Dichloro 5-sulfamoyl benzoic acid)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free: 
    0.220 (Depositor), 0.231 (DCC) 
  • R-Value Work: 
    0.192 (Depositor), 0.201 (DCC) 

wwPDB Validation 3D Report Full Report

Validation slider image for 8QHG

Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history

Literature

Lasamide, a Potent Human Carbonic Anhydrase Inhibitor from the Market: Inhibition Profiling and Crystallographic Studies.

Baroni, C.D'Agostino, I.Renzi, G.Kilbile, J.T.Tamboli, Y.Ferraroni, M.Carradori, S.Capasso, C.Carta, F.Supuran, C.T.

(2024) ACS Med Chem Lett 15: 1749-1755

  • DOI: https://doi.org/10.1021/acsmedchemlett.4c00341
  • Primary Citation Related Structures: 
    8QH8, 8QHG, 8QHJ

  • PubMed Abstract: 

    Lasamide is a synthetic precursor and a contaminant of the diuretic Furosemide manufacturing process and represents a highly valuable building block for fragment-based drug discovery approaches. We assessed the ability of Lasamide to inhibit in vitro the human-expressed Carbonic Anhydrases by means of the stopped-flow technique, and we assessed its binding modes within hCAs II and XII-mimic catalytic clefts by X-ray crystallography. Interestingly, an unprecedented crystal form for the hCA IX mimic H-tag is reported and discussed herein.


  • Organizational Affiliation
    • Department of Chemistry "Ugo Schiff", University of Florence, 50019, Sesto Fiorentino, Florence, Italy.

Macromolecule Content 

  • Total Structure Weight: 30.45 kDa 
  • Atom Count: 2,176 
  • Modeled Residue Count: 263 
  • Deposited Residue Count: 266 
  • Unique protein chains: 1

Macromolecules

Find similar proteins by:|  3D Structure
Entity ID: 1
MoleculeChains  Sequence LengthOrganismDetailsImage
Carbonic anhydrase 2266Homo sapiensMutation(s): 10 
Gene Names: CA2
EC: 4.2.1.1 (UniProt), 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

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free:  0.220 (Depositor), 0.231 (DCC) 
  • R-Value Work:  0.192 (Depositor), 0.201 (DCC) 
Space Group: I 4 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 157.33α = 90
b = 157.33β = 90
c = 157.33γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XSCALEdata scaling
XDSdata reduction
REFMACphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

& Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European Union (EU)European UnionB83C22003920001

Revision History  (Full details and data files)

  • Version 1.0: 2024-09-18
    Type: Initial release
  • Version 1.1: 2025-10-01
    Changes: Database references, Structure summary