6HAX

Crystal structure of PROTAC 2 in complex with the bromodomain of human SMARCA2 and pVHL:ElonginC:ElonginB

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.234 

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


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


Literature

BAF complex vulnerabilities in cancer demonstrated via structure-based PROTAC design.

Farnaby, W., Koegl, M., Roy, M.J., Whitworth, C., Diers, E., Trainor, N., Zollman, D., Steurer, S., Karolyi-Oezguer, J., Riedmueller, C., Gmaschitz, T., Wachter, J., Dank, C., Galant, M., Sharps, B., Rumpel, K., Traxler, E., Gerstberger, T., Schnitzer, R., Petermann, O., Greb, P., Weinstabl, H., Bader, G., Zoephel, A., Weiss-Puxbaum, A., Ehrenhofer-Wolfer, K., Wohrle, S., Boehmelt, G., Rinnenthal, J., Arnhof, H., Wiechens, N., Wu, M.Y., Owen-Hughes, T., Ettmayer, P., Pearson, M., McConnell, D.B., Ciulli, A.

(2019) Nat Chem Biol 15: 672-680

  • DOI: 10.1038/s41589-019-0294-6
  • Primary Citation of Related Structures:  
    6HAX, 6HAY, 6HAZ, 6HR2

  • PubMed Abstract: 

    • Targeting subunits of BAF/PBAF chromatin remodeling complexes has been proposed as an approach to exploit cancer vulnerabilities. Here, we develop proteolysis targeting chimera (PROTAC) degraders of the BAF ATPase subunits SMARCA2 and SMARCA4 using a bromodomain ligand and recruitment of the E3 ubiquitin ligase VHL ...

    Targeting subunits of BAF/PBAF chromatin remodeling complexes has been proposed as an approach to exploit cancer vulnerabilities. Here, we develop proteolysis targeting chimera (PROTAC) degraders of the BAF ATPase subunits SMARCA2 and SMARCA4 using a bromodomain ligand and recruitment of the E3 ubiquitin ligase VHL. High-resolution ternary complex crystal structures and biophysical investigation guided rational and efficient optimization toward ACBI1, a potent and cooperative degrader of SMARCA2, SMARCA4 and PBRM1. ACBI1 induced anti-proliferative effects and cell death caused by SMARCA2 depletion in SMARCA4 mutant cancer cells, and in acute myeloid leukemia cells dependent on SMARCA4 ATPase activity. These findings exemplify a successful biophysics- and structure-based PROTAC design approach to degrade high profile drug targets, and pave the way toward new therapeutics for the treatment of tumors sensitive to the loss of BAF complex ATPases.

    Organizational Affiliation: 

    Division of Biological Chemistry and Drug Discovery, School of Life Sciences, University of Dundee, Dundee, UK. a.ciulli@dundee.ac.uk.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Probable global transcription activator SNF2L2A, E123Homo sapiensMutation(s): 0 
Gene Names: SMARCA2, BAF190B, BRM, SNF2A, SNF2L2
EC: 3.6.4
UniProt & NIH Common Fund Data Resources
Find proteins for P51531 (Homo sapiens)
Explore P51531 
Go to UniProtKB:  P51531
PHAROS:  P51531
GTEx:  ENSG00000080503 
Entity Groups  
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UniProt GroupP51531
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
von Hippel-Lindau disease tumor suppressorB, F162Homo sapiensMutation(s): 0 
Gene Names: VHL
UniProt & NIH Common Fund Data Resources
Find proteins for P40337 (Homo sapiens)
Explore P40337 
Go to UniProtKB:  P40337
PHAROS:  P40337
GTEx:  ENSG00000134086 
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UniProt GroupP40337
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Elongin-CC, G97Homo sapiensMutation(s): 0 
Gene Names: ELOC, TCEB1
UniProt & NIH Common Fund Data Resources
Find proteins for Q15369 (Homo sapiens)
Explore Q15369 
Go to UniProtKB:  Q15369
PHAROS:  Q15369
GTEx:  ENSG00000154582 
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UniProt GroupQ15369
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Elongin-BD, H104Homo sapiensMutation(s): 0 
Gene Names: ELOB, TCEB2
UniProt & NIH Common Fund Data Resources
Find proteins for Q15370 (Homo sapiens)
Explore Q15370 
Go to UniProtKB:  Q15370
PHAROS:  Q15370
GTEx:  ENSG00000103363 
Entity Groups  
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UniProt GroupQ15370
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Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FWZ (Subject of Investigation/LOI)
Query on FWZ
Download Ideal Coordinates CCD File 
K [auth B],
T [auth F]		(2~{S},4~{R})-~{N}-[[2-[2-[4-[[4-[3-azanyl-6-(2-hydroxyphenyl)pyridazin-4-yl]piperazin-1-yl]methyl]phenyl]ethoxy]-4-(4-methyl-1,3-thiazol-5-yl)phenyl]methyl]-1-[(2~{S})-2-[(1-fluoranylcyclopropyl)carbonylamino]-3,3-dimethyl-butanoyl]-4-oxidanyl-pyrrolidine-2-carboxamide
C49 H58 F N9 O6 S
UTZVLJZPTDCKCT-XBPZXCMESA-N		 Ligand Interaction
EPE
Query on EPE
Download Ideal Coordinates CCD File 
O [auth B]4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N		 Ligand Interaction
EDO
Query on EDO
Download Ideal Coordinates CCD File 
I [auth A],
J [auth A],
L [auth B],
M [auth B],
N [auth B],
I [auth A],
J [auth A],
L [auth B],
M [auth B],
N [auth B],
P [auth C],
Q [auth D],
R [auth D],
S [auth E],
U [auth F],
V [auth G],
W [auth H],
X [auth H],
Y [auth H]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.35 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.234 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 80.508α = 90
b = 116.241β = 90
c = 120.596γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
PHASERphasing
BUSTERrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Ligand Structure Quality Assessment 


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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
European Research CouncilERC-2012-StG-311460 DrugE3CRLs

Revision History  (Full details and data files)

  • Version 1.0: 2019-06-12
    Type: Initial release
  • Version 1.1: 2019-06-19
    Changes: Data collection, Database references
  • Version 1.2: 2019-07-03
    Changes: Data collection, Database references