1SZD

Structural basis for nicotinamide cleavage and ADP-ribose transfer by NAD+-dependent Sir2 histone/protein deacetylases


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.214 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural basis for nicotinamide cleavage and ADP-ribose transfer by NAD(+)-dependent Sir2 histone/protein deacetylases.

Zhao, K.Harshaw, R.Chai, X.Marmorstein, R.

(2004) Proc.Natl.Acad.Sci.Usa 101: 8563-8568

  • DOI: 10.1073/pnas.0401057101
  • Primary Citation of Related Structures:  1SZC

  • PubMed Abstract: 
  • Sir2 enzymes are broadly conserved from bacteria to humans and have been implicated to play roles in gene silencing, DNA repair, genome stability, longevity, metabolism, and cell physiology. These enzymes bind NAD(+) and acetyllysine within protein t ...

    Sir2 enzymes are broadly conserved from bacteria to humans and have been implicated to play roles in gene silencing, DNA repair, genome stability, longevity, metabolism, and cell physiology. These enzymes bind NAD(+) and acetyllysine within protein targets and generate lysine, 2'-O-acetyl-ADP-ribose, and nicotinamide products. To provide structural insights into the chemistry catalyzed by Sir2 proteins we report the high-resolution ternary structure of yeast Hst2 (homologue of Sir two 2) with an acetyllysine histone H4 peptide and a nonhydrolyzable NAD(+) analogue, carba-NAD(+), as well as an analogous ternary complex with a reaction intermediate analog formed immediately after nicotinamide hydrolysis, ADP-ribose. The ternary complex with carba-NAD(+) reveals that the nicotinamide group makes stabilizing interactions within a binding pocket harboring conserved Sir2 residues. Moreover, an asparagine residue, N116, strictly conserved within Sir2 proteins and shown to be essential for nicotinamide exchange, is in position to stabilize the oxocarbenium intermediate that has been proposed to proceed the hydrolysis of nicotinamide. A comparison of this structure with the ADP-ribose ternary complex and a previously reported ternary complex with the 2'-O-acetyl-ADP-ribose reaction product reveals that the ribose ring of the cofactor and the highly conserved beta1-alpha2 loop of the protein undergo significant structural rearrangements to facilitate the ordered NAD(+) reactions of nicotinamide cleavage and ADP-ribose transfer to acetate. Together, these studies provide insights into the chemistry of NAD(+) cleavage and acetylation by Sir2 proteins and have implications for the design of Sir2-specific regulatory molecules.


    Related Citations: 
    • Structure Of The Yeast Hst2 Protein Deacetylase In Ternary Complex With 2'-O-Acetyl ADP Ribose and Histone Peptide
      Zhao, K.,Chai, X.,Clements, A.,Marmorstein, R.
      (2003) Structure 11: 1403
    • Structure and Autoregulation Of The Yeast Hst2 Homolog Of Sir2
      Zhao, K.,Harshaw, R.,Chai, X.,Marmorstein, R.
      (2003) Nat.Struct.Mol.Biol. 10: 864


    Organizational Affiliation

    The Wistar Institute, Department of Biochemistry and Biophysics, School of Medicine, and Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NAD-dependent deacetylase HST2
A
297Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: HST2
EC: 3.5.1.-
Find proteins for P53686 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P53686
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Histone H4 peptide
B
10Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Gene Names: HHF1, HHF2
Find proteins for P02309 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P02309
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
APR
Query on APR

Download SDF File 
Download CCD File 
A
ADENOSINE-5-DIPHOSPHORIBOSE
C15 H23 N5 O14 P2
SRNWOUGRCWSEMX-KEOHHSTQSA-N
 Ligand Interaction
ZN
Query on ZN

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

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Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
ALY
Query on ALY
B
L-PEPTIDE LINKINGC8 H16 N2 O3LYS
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
APRKd: 29160 nM BINDINGMOAD
APRKd: 29160 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.214 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 105.383α = 90.00
b = 105.383β = 90.00
c = 66.150γ = 120.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
CNSrefinement
HKL-2000data reduction
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-06-15
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Non-polymer description, Version format compliance