3C7P

Crystal structure of human carbonic anhydrase II in complex with STX237


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Anticancer steroid sulfatase inhibitors: synthesis of a potent fluorinated second-generation agent, in vitro and in vivo activities, molecular modeling, and protein crystallography

Woo, L.W.L.Fischer, D.S.Sharland, C.M.Trusselle, M.Foster, P.A.Chander, S.K.Di Fiore, A.Supuran, C.T.De Simone, G.Purohit, A.Reed, M.J.Potter, B.V.L.

(2008) Mol.Cancer Ther. 7: 2435-2444

  • DOI: 10.1158/1535-7163.MCT-08-0195

  • PubMed Abstract: 
  • An improved steroid sulfatase inhibitor was prepared by replacing the N-propyl group of the second-generation steroid-like inhibitor (2) with a N-3,3,3-trifluoropropyl group to give (10). This compound is 5-fold more potent in vitro, completely inhib ...

    An improved steroid sulfatase inhibitor was prepared by replacing the N-propyl group of the second-generation steroid-like inhibitor (2) with a N-3,3,3-trifluoropropyl group to give (10). This compound is 5-fold more potent in vitro, completely inhibits rat liver steroid sulfatase activity after a single oral dose of 0.5 mg/kg, and exhibits a significantly longer duration of inhibition over (2). These biological properties are attributed to the increased lipophilicity and metabolic stability of (10) rendered by its trifluoropropyl group and also the potential H-bonding between its fluorine atom(s) and Arg(98) in the active site of human steroid sulfatase. Like other sulfamates, (10) is expected to be sequestered, and transported by, erythrocytes in vivo because it inhibits human carbonic anhydrase II (hCAII) potently (IC(50), 3 nmol/L). A congener (4), which possesses a N-(pyridin-3-ylmethyl) substituent, is even more active (IC(50), 0.1 nmol/L). To rationalize this, the hCAII-(4) adduct, obtained by cocrystallization, reveals not only the sulfamate group and the backbone of (4) interacting with the catalytic site and the associated hydrophobic pocket, respectively, but also the potential H-bonding between the N-(pyridin-3-ylmethyl) group and Nepsilon(2) of Gln(136). Like (2), both (10) and its phenolic precursor (9) are non-estrogenic using a uterine weight gain assay. In summary, a highly potent, long-acting, and nonestrogenic steroid sulfatase inhibitor was designed with hCAII inhibitory properties that should positively influence in vivo behavior. Compound (10) and other related inhibitors of this structural class further expand the armory of steroid sulfatase inhibitors against hormone-dependent breast cancer.


    Related Citations: 
    • 2-substituted estradiol bis-sulfamates, multitargeted antitumor agents: synthesis, in vitro SAR, protein crystallography, and in vivo activity
      Leese, M.P.,Leblond, B.,Smith, A.,Newman, S.P.,Di Fiore, A.,De Simone, G.,Supuran, C.T.,Purohit, A.,Reed, M.J.,Potter, B.V.
      (2006) J.Med.Chem. 49: 7683
    • Structure Activity Relationships of C-17 Cyano-Substituted Estratrienes as Anticancer Agents
      Leese, M.P.,Jourdan, F.,Gaukroger, K.,Mahon, M.F.,Newman, S.P.,Foster, P.,Stengel, C.,Regis-Lydi, S.,Ferrandis, E.,Di Fiore, A.,De Simone, G.,Supuran, C.T.,Purohit, A.,Reed, M.J.,Potter, B.V.L.
      () TO BE PUBLISHED --: --


    Organizational Affiliation

    Medicinal Chemistry, Department of Pharmacy and Pharmacology and Sterix Ltd., University of Bath, Claverton Down, Bath, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Carbonic anhydrase 2
A
260Homo sapiensMutation(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 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MBO
Query on MBO

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Download CCD File 
A
MERCURIBENZOIC ACID
C7 H5 Hg O2
FVFZSVRSDNUCGG-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

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Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
POF
Query on POF

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Download CCD File 
A
(4aS,4bR,10bS,12aS)-12a-methyl-1,3-dioxo-2-(pyridin-3-ylmethyl)-1,2,3,4,4a,4b,5,6,10b,11,12,12a-dodecahydronaphtho[2,1-f]isoquinolin-8-yl sulfamate
C24 H27 N3 O5 S
LSJKARAMQNGZDF-YOEKFXIASA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
CLKi: 200000000 nM (100) BINDINGDB
POFIC50: 0.1 nM BINDINGMOAD
POFIC50: 0.1 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.181 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 42.050α = 90.00
b = 41.440β = 104.35
c = 71.670γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
MAR345data collection
SCALEPACKdata scaling
CNSrefinement
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-01-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Non-polymer description, Version format compliance
  • Version 1.2: 2017-10-25
    Type: Refinement description