6HSK

Crystal structure of a human HDAC8 L6 loop mutant complexed with Quisinostat

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.152 
  • R-Value Observed: 0.154 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history. 


Literature

Characterization of Histone Deacetylase 8 (HDAC8) Selective Inhibition Reveals Specific Active Site Structural and Functional Determinants.

Marek, M., Shaik, T.B., Heimburg, T., Chakrabarti, A., Lancelot, J., Ramos-Morales, E., Da Veiga, C., Kalinin, D., Melesina, J., Robaa, D., Schmidtkunz, K., Suzuki, T., Holl, R., Ennifar, E., Pierce, R.J., Jung, M., Sippl, W., Romier, C.

(2018) J Med Chem 61: 10000-10016

  • DOI: 10.1021/acs.jmedchem.8b01087
  • Primary Citation of Related Structures:  
    6HT8, 6HSK, 6HSF, 6HSH, 6HSG, 6HTZ, 6HU3, 6HTT, 6HU0, 6HU2

  • PubMed Abstract: 

    • Metal-dependent histone deacetylases (HDACs) are key epigenetic regulators that represent promising therapeutic targets for the treatment of numerous human diseases. Yet the currently FDA-approved HDAC inhibitors nonspecifically target at least several o ...

    Metal-dependent histone deacetylases (HDACs) are key epigenetic regulators that represent promising therapeutic targets for the treatment of numerous human diseases. Yet the currently FDA-approved HDAC inhibitors nonspecifically target at least several of the 11 structurally similar but functionally different HDAC isozymes, which hampers their broad usage in clinical settings. Selective inhibitors targeting single HDAC isozymes are being developed, but precise understanding in molecular terms of their selectivity remains sparse. Here, we show that HDAC8-selective inhibitors adopt a L-shaped conformation required for their binding to a HDAC8-specific pocket formed by HDAC8 catalytic tyrosine and HDAC8 L1 and L6 loops. In other HDAC isozymes, a L1-L6 lock sterically prevents L-shaped inhibitor binding. Shielding of the HDAC8-specific pocket by protein engineering decreases potency of HDAC8-selective inhibitors and affects catalytic activity. Collectively, our results unravel key HDAC8 active site structural and functional determinants important for the design of next-generation chemical probes and epigenetic drugs.

    Organizational Affiliation: 

    Institut de Génétique et Biologie Moléculaire et Cellulaire (IGBMC), Département de Biologie Structurale Intégrative , Université de Strasbourg, Centre National de la Recherche Scientifique (CNRS UMR7104), Institut National de la Santé et de la Recherche Médicale (INSERM U1258) , 1 rue Laurent Fries , 67404 Illkirch Cedex , France.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Histone deacetylase 8 A, B380Homo sapiensMutation(s): 0 
Gene Names: HDAC8, HDACL1, CDA07
EC: 3.5.1.98
Find proteins for Q9BY41 (Homo sapiens)
Explore Q9BY41 
Go to UniProtKB:  Q9BY41
NIH Common Fund Data Resources
PHAROS:  Q9BY41
GTEx:  ENSG00000147099
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOK
Query on GOK
Download Ideal Coordinates CCD File 
A, B
2-[4-[[(1-methylindol-3-yl)methylamino]methyl]piperidin-1-yl]-~{N}-oxidanyl-pyrimidine-5-carboxamide
C21 H26 N6 O2
PAWIYAYFNXQGAP-UHFFFAOYSA-N		 Ligand Interaction
ZN
Query on ZN
Download Ideal Coordinates CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
K
Query on K
Download Ideal Coordinates CCD File 
A, B
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.189 
  • R-Value Work: 0.152 
  • R-Value Observed: 0.154 
  • Space Group: P 32
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 106.39α = 90
b = 106.39β = 90
c = 82.03γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
European CommissionFrance241865
European CommissionFrance602080

Revision History 

  • Version 1.0: 2018-10-31
    Type: Initial release
  • Version 1.1: 2018-11-07
    Changes: Data collection, Database references
  • Version 1.2: 2018-11-14
    Changes: Data collection, Structure summary
  • Version 1.3: 2018-11-28
    Changes: Data collection, Database references