PDBsum entry 3c7p

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Lyase PDB id
Jmol PyMol
Protein chain
258 a.a. *
Waters ×282
* Residue conservation analysis
PDB id:
Name: Lyase
Title: Crystal structure of human carbonic anhydrase ii in complex stx237
Structure: Carbonic anhydrase 2. Chain: a. Synonym: carbonic anhydrase ii, carbonate dehydratase ii, c carbonic anhydrasE C, cac. Ec:
Source: Homo sapiens. Human. Organism_taxid: 9606
1.70Å     R-factor:   0.181     R-free:   0.202
Authors: A.Di Fiore,G.De Simone
Key ref: L.W.Woo et al. (2008). Anticancer steroid sulfatase inhibitors: synthesis of a potent fluorinated second-generation agent, in vitro and in vivo activities, molecular modeling, and protein crystallography. Mol Cancer Ther, 7, 2435-2444. PubMed id: 18723489 DOI: 10.1158/1535-7163.MCT-08-0195
08-Feb-08     Release date:   13-Jan-09    
Go to PROCHECK summary

Protein chain
Pfam   ArchSchema ?
P00918  (CAH2_HUMAN) -  Carbonic anhydrase 2
260 a.a.
258 a.a.
Key:    PfamA domain  Secondary structure  CATH domain

 Enzyme reactions 
   Enzyme class: E.C.  - Carbonic anhydrase.
[IntEnz]   [ExPASy]   [KEGG]   [BRENDA]
      Reaction: H2CO3 = CO2 + H2O
= CO(2)
+ H(2)O
      Cofactor: Zn(2+)
Molecule diagrams generated from .mol files obtained from the KEGG ftp site
 Gene Ontology (GO) functional annotation 
  GO annot!
  Cellular component     extracellular space   11 terms 
  Biological process     angiotensin-mediated signaling pathway   22 terms 
  Biochemical function     protein binding     6 terms  


    Added reference    
DOI no: 10.1158/1535-7163.MCT-08-0195 Mol Cancer Ther 7:2435-2444 (2008)
PubMed id: 18723489  
Anticancer steroid sulfatase inhibitors: synthesis of a potent fluorinated second-generation agent, in vitro and in vivo activities, molecular modeling, and protein crystallography.
L.W.Woo, D.S.Fischer, C.M.Sharland, M.Trusselle, P.A.Foster, S.K.Chander, A.Di Fiore, C.T.Supuran, G.De Simone, A.Purohit, M.J.Reed, B.V.Potter.
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.

Literature references that cite this PDB file's key reference

  PubMed id Reference
20505865 V.Alterio, S.M.Monti, E.Truppo, C.Pedone, C.T.Supuran, and G.De Simone (2010).
The first example of a significant active site conformational rearrangement in a carbonic anhydrase-inhibitor adduct: the carbonic anhydrase I-topiramate complex.
  Org Biomol Chem, 8, 3528-3533.
PDB code: 3lxe
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