5MGN

Human Sirt6 in complex with activator UBCS38


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.07 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.144 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis of Sirtuin 6 Activation by Synthetic Small Molecules.

You, W.Rotili, D.Li, T.M.Kambach, C.Meleshin, M.Schutkowski, M.Chua, K.F.Mai, A.Steegborn, C.

(2017) Angew. Chem. Int. Ed. Engl. 56: 1007-1011

  • DOI: 10.1002/anie.201610082
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Sirtuins are protein deacylases regulating metabolism and stress responses, and are implicated in aging-related diseases. Small molecule activators for the human sirtuins Sirt1-7 are sought as chemical tools and potential therapeutics, such as for ca ...

    Sirtuins are protein deacylases regulating metabolism and stress responses, and are implicated in aging-related diseases. Small molecule activators for the human sirtuins Sirt1-7 are sought as chemical tools and potential therapeutics, such as for cancer. Activators are available for Sirt1 and exploit its unique N-terminus, whereas drug-like activators for Sirt2-7 are lacking. We synthesized and screened pyrrolo[1,2-a]quinoxaline derivatives, yielding the first synthetic Sirt6 activators. Biochemical assays show direct, substrate-independent compound binding to the Sirt6 catalytic core and potent activation of Sirt6-dependent deacetylation of peptide substrates and complete nucleosomes. Crystal structures of Sirt6/activator complexes reveal that the compounds bind to a Sirt6-specific acyl channel pocket and identify key interactions. Our results establish potent Sirt6 activation with small molecules and provide a structural basis for further development of Sirt6 activators as tools and therapeutics.


    Organizational Affiliation

    Universität Bayreuth, Lehrstuhl Biochemie und Forschungszentrum für Biomakromoleküle, Universitätsstr. 30, 95447, Bayreuth, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NAD-dependent protein deacetylase sirtuin-6
A, B
302Homo sapiensMutation(s): 0 
Gene Names: SIRT6 (SIR2L6)
EC: 3.5.1.-
Find proteins for Q8N6T7 (Homo sapiens)
Go to Gene View: SIRT6
Go to UniProtKB:  Q8N6T7
Small Molecules
Ligands 5 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

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Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
7N2
Query on 7N2

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Download CCD File 
A
(4~{R})-4-pyridin-3-yl-5-[3-(trifluoromethyl)phenyl]sulfonyl-4~{H}-pyrrolo[1,2-a]quinoxaline
C23 H16 F3 N3 O2 S
UAZQZAONUXSURN-JOCHJYFZSA-N
 Ligand Interaction
EDO
Query on EDO

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Download CCD File 
A, B
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
AR6
Query on AR6

Download SDF File 
Download CCD File 
A, B
[(2R,3S,4R,5R)-5-(6-AMINOPURIN-9-YL)-3,4-DIHYDROXY-OXOLAN-2-YL]METHYL [HYDROXY-[[(2R,3S,4R,5S)-3,4,5-TRIHYDROXYOXOLAN-2-YL]METHOXY]PHOSPHORYL] HYDROGEN PHOSPHATE
C15 H23 N5 O14 P2
SRNWOUGRCWSEMX-ZQSHOCFMSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.07 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.144 
  • Space Group: P 63
Unit Cell:
Length (Å)Angle (°)
a = 91.868α = 90.00
b = 91.868β = 90.00
c = 145.353γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
PHASERphasing
XDSdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
OberfrankenstiftungGermany--

Revision History 

  • Version 1.0: 2016-12-28
    Type: Initial release
  • Version 1.1: 2017-01-25
    Type: Database references