6B0F

ESTROGEN RECEPTOR ALPHA LIGAND BINDING DOMAIN IN COMPLEX WITH LSZ102

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.86 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.231 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history. 


Literature

Discovery of LSZ102, a Potent, Orally Bioavailable Selective Estrogen Receptor Degrader (SERD) for the Treatment of Estrogen Receptor Positive Breast Cancer.

Tria, G.S., Abrams, T., Baird, J., Burks, H.E., Firestone, B., Gaither, L.A., Hamann, L.G., He, G., Kirby, C.A., Kim, S., Lombardo, F., Macchi, K.J., McDonnell, D.P., Mishina, Y., Norris, J.D., Nunez, J., Springer, C., Sun, Y., Thomsen, N.M., Wang, C., Wang, J., Yu, B., Tiong-Yip, C.L., Peukert, S.

(2018) J Med Chem 61: 2837-2864

  • DOI: 10.1021/acs.jmedchem.7b01682
  • Primary Citation of Related Structures:  
    6B0F

  • PubMed Abstract: 

    • In breast cancer, estrogen receptor alpha (ERα) positive cancer accounts for approximately 74% of all diagnoses, and in these settings, it is a primary driver of cell proliferation. Treatment of ERα positive breast cancer has long relied on endocrine therapies such as selective estrogen receptor modulators, aromatase inhibitors, and selective estrogen receptor degraders (SERDs) ...

    In breast cancer, estrogen receptor alpha (ERα) positive cancer accounts for approximately 74% of all diagnoses, and in these settings, it is a primary driver of cell proliferation. Treatment of ERα positive breast cancer has long relied on endocrine therapies such as selective estrogen receptor modulators, aromatase inhibitors, and selective estrogen receptor degraders (SERDs). The steroid-based anti-estrogen fulvestrant (5), the only approved SERD, is effective in patients who have not previously been treated with endocrine therapy as well as in patients who have progressed after receiving other endocrine therapies. Its efficacy, however, may be limited due to its poor physicochemical properties. We describe the design and synthesis of a series of potent benzothiophene-containing compounds that exhibit oral bioavailability and preclinical activity as SERDs. This article culminates in the identification of LSZ102 (10), a compound in clinical development for the treatment of ERα positive breast cancer.

    Organizational Affiliation: 

    Novartis Institutes for BioMedical Research, Inc. , 250 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States.



Macromolecules
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(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Estrogen receptorA, B254Homo sapiensMutation(s): 3 
Gene Names: ESR1, ESR, NR3A1
UniProt & NIH Common Fund Data Resources
Find proteins for P03372 (Homo sapiens)
Explore P03372 
Go to UniProtKB:  P03372
PHAROS:  P03372
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP03372
Protein Feature View
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  • Reference Sequence
Small Molecules
Binding Affinity Annotations 
IDSourceBinding Affinity
C6V BindingDB:  6B0F IC50: min: 0.2, max: 8.9 (nM) from 4 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.86 Å
  • R-Value Free: 0.299 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.231 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.82α = 90
b = 52.1β = 114.33
c = 97.02γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling
BUSTERrefinement
BUSTERphasing

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-04-04
    Type: Initial release
  • Version 1.1: 2018-04-25
    Changes: Data collection, Database references
  • Version 1.2: 2019-12-25
    Changes: Derived calculations, Structure summary