1Q14

Structure and autoregulation of the yeast Hst2 homolog of Sir2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and autoregulation of the Yeast Hst2 homolog of Sir2

Zhao, K.Chai, X.Clements, A.Marmorstein, R.

(2003) Nat.Struct.Mol.Biol. 10: 864-871

  • DOI: 10.1038/nsb978
  • Also Cited By: 1SZD, 1SZC

  • PubMed Abstract: 
  • Yeast Hst2 (yHst2) is a member of the silencing information regulator 2 (Sir2) family of NAD(+)-dependent protein deacetylases that are implicated in transcriptional silencing, DNA repair, genome stability and longevity. The X-ray crystal structure o ...

    Yeast Hst2 (yHst2) is a member of the silencing information regulator 2 (Sir2) family of NAD(+)-dependent protein deacetylases that are implicated in transcriptional silencing, DNA repair, genome stability and longevity. The X-ray crystal structure of the full-length yHst2 protein reveals a central catalytic core domain fold that is characteristic of the other Sir2 homologs, and C- and N-terminal extensions that interact with the NAD(+) and acetyl-lysine substrate-binding sites, respectively, suggesting an autoregulatory function for these domains. Moreover, the N-terminal extension mediates formation of a homotrimer within the crystal lattice. Enzymatic and sedimentation equilibrium studies using deletion constructs of yHst2 support the involvement of the N- and C-terminal yHst2 regions and trimer formation in catalysis by yHst2. Together, these studies indicate that the sequence-divergent N- and C-terminal regions of the eukaryotic Sir2 proteins may have a particularly important role in their distinct substrate-binding properties, biological activities or both.


    Organizational Affiliation

    The Wistar Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HST2 protein
A
361Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: HST2
EC: 3.5.1.-
Find proteins for P53686 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P53686
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.219 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 103.554α = 90.00
b = 103.554β = 90.00
c = 177.346γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSrefinement
HKL-2000data reduction
SOLVEphasing
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2003-09-30
    Type: Initial release
  • Version 1.1: 2008-04-29
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Derived calculations, Version format compliance