1W22

Crystal structure of inhibited human HDAC8


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal Structure of a Eukaryotic Zn-Dependent Histone Deacetylase,Human Hdac8,Complexed with a Hydroxamic Acid Inhibitor

Vannini, A.Volpari, C.Filocamo, G.Caroli Casavola, E.Brunetti, M.Renzoni, D.Chakravarty, P.Paolini, C.De Francesco, R.Gallinari, P.Steinckuhler, C.Di Marco, S.

(2004) Proc.Natl.Acad.Sci.USA 101: 15064

  • DOI: 10.1073/pnas.0404603101

  • PubMed Abstract: 
  • Histone deacetylases (HDACs) are a family of enzymes involved in the regulation of gene expression, DNA repair, and stress response. These processes often are altered in tumors, and HDAC inhibitors have had pronounced antitumor activity with promisin ...

    Histone deacetylases (HDACs) are a family of enzymes involved in the regulation of gene expression, DNA repair, and stress response. These processes often are altered in tumors, and HDAC inhibitors have had pronounced antitumor activity with promising results in clinical trials. Here, we report the crystal structure of human HDAC8 in complex with a hydroxamic acid inhibitor. Such a structure of a eukaryotic zinc-dependent HDAC has not be described previously. Similar to bacterial HDAC-like protein, HDAC8 folds in a single alpha/beta domain. The inhibitor and the zinc-binding sites are similar in both proteins. However, significant differences are observed in the length and structure of the loops surrounding the active site, including the presence of two potassium ions in HDAC8 structure, one of which interacts with key catalytic residues. CD data suggest a direct role of potassium in the fold stabilization of HDAC8. Knockdown of HDAC8 by RNA interference inhibits growth of human lung, colon, and cervical cancer cell lines, highlighting the importance of this HDAC subtype for tumor cell proliferation. Our findings open the way for the design and development of selective inhibitors of HDAC8 as possible antitumor agents.


    Organizational Affiliation

    Department of Biochemistry, Istituto di Ricerche di Biologia Molecolare P. Angeletti, 00040 Pomezia, Rome, Italy.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HISTONE DEACETYLASE 8
A, B
377Homo sapiensMutation(s): 0 
Gene Names: HDAC8 (HDACL1)
EC: 3.5.1.98
Find proteins for Q9BY41 (Homo sapiens)
Go to Gene View: HDAC8
Go to UniProtKB:  Q9BY41
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
A, B
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
NHB
Query on NHB

Download SDF File 
Download CCD File 
A, B
N-HYDROXY-4-(METHYL{[5-(2-PYRIDINYL)-2-THIENYL]SULFONYL}AMINO)BENZAMIDE
C17 H15 N3 O4 S2
LFGYSFPVLMPUPE-UHFFFAOYSA-N
 Ligand Interaction
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
NHBIC50: 176 nM BINDINGMOAD
NHBIC50: 176 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.210 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 51.746α = 90.00
b = 83.532β = 97.48
c = 94.653γ = 90.00
Software Package:
Software NamePurpose
AMoREphasing
MOSFLMdata reduction
CNXrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-09-24
    Type: Initial release
  • Version 1.1: 2013-01-30
    Type: Data collection, Database references, Derived calculations, Non-polymer description, Other, Refinement description, Structure summary, Version format compliance