6HR2

Crystal structure of PROTAC 2 in complex with the bromodomain of human SMARCA4 and pVHL:ElonginC:ElonginB


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.76 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 

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
Transcription activator BRG1A, E120Homo sapiensMutation(s): 0 
Gene Names: SMARCA4BAF190ABRG1SNF2BSNF2L4
EC: 3.6.4
UniProt & NIH Common Fund Data Resources
Find proteins for P51532 (Homo sapiens)
Explore P51532 
Go to UniProtKB:  P51532
PHAROS:  P51532
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UniProt GroupP51532
Protein Feature View
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
von Hippel-Lindau disease tumor suppressorB, F149Homo sapiensMutation(s): 0 
Gene Names: VHL
UniProt & NIH Common Fund Data Resources
Find proteins for P40337 (Homo sapiens)
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PHAROS:  P40337
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UniProt GroupP40337
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Elongin-CC, G97Homo sapiensMutation(s): 0 
Gene Names: ELOCTCEB1
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PHAROS:  Q15369
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Elongin-BD, H104Homo sapiensMutation(s): 0 
Gene Names: ELOBTCEB2
UniProt & NIH Common Fund Data Resources
Find proteins for Q15370 (Homo sapiens)
Explore Q15370 
Go to UniProtKB:  Q15370
PHAROS:  Q15370
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UniProt GroupQ15370
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FWZ
Query on FWZ

Download Ideal Coordinates CCD File 
I [auth B],
L [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
DMS
Query on DMS

Download Ideal Coordinates CCD File 
J [auth B],
K [auth E]
DIMETHYL SULFOXIDE
C2 H6 O S
IAZDPXIOMUYVGZ-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download Ideal Coordinates CCD File 
M [auth F],
N [auth H]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.76 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.332α = 69.43
b = 61.678β = 83.38
c = 81.603γ = 86.42
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
BUSTERrefinement
PDB_EXTRACTdata extraction
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Deposition Data

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