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 
  • R-Value Observed: 0.146 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 


This is version 1.2 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: https://doi.org/10.1002/anie.201610082
  • Primary Citation of Related Structures:  
    5MF6, 5MFP, 5MFZ, 5MGN

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
NAD-dependent protein deacetylase sirtuin-6
A, B
302Homo sapiensMutation(s): 0 
Gene Names: SIRT6SIR2L6
EC: 3.5.1
UniProt & NIH Common Fund Data Resources
Find proteins for Q8N6T7 (Homo sapiens)
Go to UniProtKB:  Q8N6T7
PHAROS:  Q8N6T7
GTEx:  ENSG00000077463 
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 5 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
AR6
Query on AR6

Download Ideal Coordinates CCD File 
C [auth A],
L [auth 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
7N2
Query on 7N2

Download Ideal Coordinates CCD File 
K [auth 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
SO4
Query on SO4

Download Ideal Coordinates CCD File 
E [auth A]
F [auth A]
G [auth A]
H [auth A]
I [auth A]
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
N [auth B],
O [auth B],
P [auth B],
Q [auth B]
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
ZN
Query on ZN

Download Ideal Coordinates CCD File 
D [auth A],
M [auth B]
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
J [auth A],
R [auth B]
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.07 Å
  • R-Value Free: 0.192 
  • R-Value Work: 0.144 
  • R-Value Observed: 0.146 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.868α = 90
b = 91.868β = 90
c = 145.353γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 


Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
OberfrankenstiftungGermany--

Revision History  (Full details and data files)

  • Version 1.0: 2016-12-28
    Type: Initial release
  • Version 1.1: 2017-01-25
    Changes: Database references
  • Version 1.2: 2024-01-17
    Changes: Data collection, Database references, Refinement description, Structure summary