5FQV

Selective estrogen receptor downregulator antagonists: Tetrahydroisoquinoline phenols 5.

• PDB DOI:  https://doi.org/10.2210/pdb5FQV/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): Yes 


• Deposited: 2015-12-14 Released: 2016-02-10 
• Deposition Author(s): Scott, J.S., bailey, A., Davies, R.D.M., Degorce, S.L., MacFaul, P.A., Gingell, H., Moss, T., Norman, R.A., Pink, J.H., Rabow, A.A., Roberts, B., Smith, P.D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.74 Å
• R-Value Free: 0.234 
• R-Value Work: 0.193 
• R-Value Observed: 0.195 

Literature

Tetrahydroisoquinoline Phenols: Selective Estrogen Receptor Downregulator Antagonists with Oral Bioavailability in Rat.

Scott, J.S., Bailey, A., Davies, R.D.M., Degorce, S.L., Macfaul, P.A., Gingell, H., Moss, T., Norman, R.A., Pink, J.H., Rabow, A.A., Roberts, B., Smith, P.D.

(2016) ACS Med Chem Lett 7: 94

• PubMed: 26819673 
• DOI: https://doi.org/10.1021/acsmedchemlett.5b00413
• Primary Citation of Related Structures:  
  5FQP, 5FQR, 5FQS, 5FQT, 5FQV


• PubMed Abstract: 
  

A series of tetrahydroisoquinoline phenols was modified to give an estrogen receptor downregulator-antagonist profile. Optimization around the core, alkyl side chain, and pendant aryl ring resulted in compounds with subnanomolar levels of potency. The phenol functionality was shown to be required to achieve highly potent compounds, but unusually this was compatible with obtaining high oral bioavailabilities in rat.

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Related Citations: 

• Azd9496: An Oral Estrogen Receptor Inhibitor that Blocks the Growth of Er-Positive and Esr1-Mutant Breast Tumors in Preclinical Models.
  Weir, H.M., Bradbury, R.H., Lawson, M., Rabow, A.A., Buttar, D., Callis, R.J., Curwen, J.O., De Almeida, C., Ballard, P., Hulse, M., Donald, C.S., Feron, L.J.L., Karoutchi, G., Macfaul, P., Moss, T., Norman, R.A., Pearson, S.E., Tonge, M., Davies, G., Walker, G.E., Wilson, Z., Rowlinson, R., Powell, S., Sadler, C., Richmond, G., Ladd, B., Pazolli, E., Mazzola, A.M., D'Cruz, C., De Savi, C.
  (2016) Cancer Res 76: 3307

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Organizational Affiliation: 

Oncology iMed, AstraZeneca , Mereside, Alderley Park, Macclesfield, SK10 4TG, U.K.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 28.62 kDa 
• Atom Count: 1,984 
• Modelled Residue Count: 233 
• Deposited Residue Count: 248 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ESTROGEN RECEPTOR ALPHA	A	248	Homo sapiens	Mutation(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

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
VQI	B [auth A]	(E)-3-[4-(6-hydroxy-2-isobutyl-7-methyl-3,4-dihydro-1H-isoquinolin-1-yl)phenyl]prop-2-enoic acid C23 H27 N O3 GPXQLFBYCIDAAI-MFJULSPGSA-N

Binding Affinity Annotations
ID	Source	Binding Affinity
VQI	BindingDB:  5FQV	IC50: min: 43, max: 160 (nM) from 2 assay(s)
	Binding MOAD:  5FQV	IC50: 610 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.74 Å
• R-Value Free: 0.234 
• R-Value Work: 0.193 
• R-Value Observed: 0.195 
• Space Group: P 6₅ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 58.329	α = 90
b = 58.329	β = 90
c = 275.591	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2016-02-10 
Deposition Author(s): Scott, J.S., bailey, A., Davies, R.D.M., Degorce, S.L., MacFaul, P.A., Gingell, H., Moss, T., Norman, R.A., Pink, J.H., Rabow, A.A., Roberts, B., Smith, P.D.

Revision History  

• Version 1.0: 2016-02-10
  Type: Initial release
  
• Version 1.1: 2016-10-12
  Changes: Database references