4FZ3

Crystal structure of SIRT3 in complex with acetyl p53 peptide coupled with 4-amino-7-methylcoumarin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Discovery and Mechanism Study of SIRT1 Activators that Promote the Deacetylation of Fluorophore-Labeled Substrate

Wu, J.Zhang, D.Chen, L.Li, J.Wang, J.Ning, C.Yu, N.Zhao, F.Chen, D.Chen, X.Chen, K.Jiang, H.Liu, H.Liu, D.

(2013) J.Med.Chem. 56: 761-780

  • DOI: 10.1021/jm301032j

  • PubMed Abstract: 
  • SIRT1 is an NAD(+)-dependent deacetylase, whose activators have potential therapeutic applications in age-related diseases. Here we report a new class of SIRT1 activators. The activation is dependent on the fluorophore labeled to the substrate. To el ...

    SIRT1 is an NAD(+)-dependent deacetylase, whose activators have potential therapeutic applications in age-related diseases. Here we report a new class of SIRT1 activators. The activation is dependent on the fluorophore labeled to the substrate. To elucidate the activation mechanism, we solved the crystal structure of SIRT3/ac-RHKK(ac)-AMC complex. The structure revealed that the fluorophore blocked the H-bond formation and created a cavity between the substrate and the Rossmann fold. We built the SIRT1/ac-RHKK(ac)-AMC complex model based on the crystal structure. K(m) and K(d) determinations demonstrated that the fluorophore decreased the peptide binding affinity. The binding modes of SIRT1 activators indicated that a portion of the activators interacts with the fluorophore through π-stacking, while the other portion inserts into the cavity or interacts with the Rossmann fold, thus increasing the substrate affinity. Our study provides new insights into the mechanism of SIRT1 activation and may aid the design of novel SIRT1 activators.


    Organizational Affiliation

    Department of Pharmacology III, Shanghai Institute of Materia Medica , Chinese Academy of Sciences, 555 Zu-Chong-Zhi Road, Shanghai 201203, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NAD-dependent protein deacetylase sirtuin-3, mitochondrial
A
283Homo sapiensMutation(s): 0 
Gene Names: SIRT3 (SIR2L3)
EC: 3.5.1.-
Find proteins for Q9NTG7 (Homo sapiens)
Go to Gene View: SIRT3
Go to UniProtKB:  Q9NTG7
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
peptide from Cellular tumor antigen p53
B
6Homo sapiensMutation(s): 0 
Gene Names: TP53 (P53)
Find proteins for P04637 (Homo sapiens)
Go to Gene View: TP53
Go to UniProtKB:  P04637
Small Molecules
Ligands 1 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
Modified Residues  3 Unique
IDChainsTypeFormula2D DiagramParent
ALY
Query on ALY
B
L-PEPTIDE LINKINGC8 H16 N2 O3LYS
MCM
Query on MCM
B
NON-POLYMERC10 H9 N O2

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ACE
Query on ACE
B
NON-POLYMERC2 H4 O

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.1 Å
  • R-Value Free: 0.282 
  • R-Value Work: 0.208 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 114.809α = 90.00
b = 114.809β = 90.00
c = 123.202γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data collection
REFMACrefinement
MOLREPphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-03-20
    Type: Initial release