6GBX

Crystal structure of human glutaminyl cyclase variant Y115E-Y117E in complex with SEN177


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.72 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.159 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The structure of the human glutaminyl cyclase-SEN177 complex indicates routes for developing new potent inhibitors as possible agents for the treatment of neurological disorders.

Pozzi, C.Di Pisa, F.Benvenuti, M.Mangani, S.

(2018) J Biol Inorg Chem 23: 1219-1226

  • DOI: 10.1007/s00775-018-1605-1
  • Primary Citation of Related Structures:  
    6GBX

  • PubMed Abstract: 
  • Recent evidence links the role of human glutaminyl cyclase (hQC) to the amyloidogenic process involved in Alzheimer's disease (AD). hQC is a zinc enzyme present in neuronal tissue and its activity is responsible for the cyclization of N-terminal Gln or G ...

    Recent evidence links the role of human glutaminyl cyclase (hQC) to the amyloidogenic process involved in Alzheimer's disease (AD). hQC is a zinc enzyme present in neuronal tissue and its activity is responsible for the cyclization of N-terminal Gln or Glu β-amyloid peptides, leading to N-pyroglutamic acid peptides (pE-Aβ) that is probably a crucial event in the initiation and progress of the disease. Indeed, pE-containing peptides exhibit an elevated neurotoxicity and a tendency to aggregate. These observations render hQC inhibition an attractive strategy for developing new molecules active against AD. We present here the crystal structure of hQC in complex with SEN177, a newly designed molecule. The SEN177-binding mode to hQC differs from that of the known hQC inhibitors. SEN177 K i on hQC is 20 nM, comparable or better than that of the most potent known hQC inhibitors PBD150 and PQ912. In addition, SEN177 already demonstrated relevant pharmacological properties in in vivo models of Huntington's disease. All these properties make SEN177 an important scaffold for developing molecules acting on AD and related diseases.


    Organizational Affiliation

    Department of Biotechnology, Chemistry and Pharmacy, Department of Excellence 2018-2022, University of Siena, via Aldo Moro, 2, 53100, Siena, SI, Italy. stefano.mangani@unisi.it.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Glutaminyl-peptide cyclotransferase ABC329Homo sapiensMutation(s): 2 
Gene Names: QPCT
EC: 2.3.2.5
Find proteins for Q16769 (Homo sapiens)
Explore Q16769 
Go to UniProtKB:  Q16769
NIH Common Fund Data Resources
PHAROS:  Q16769
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
S77
Query on S77

Download Ideal Coordinates CCD File 
A, B, C
2-fluoranyl-5-[2-[4-(4-methyl-1,2,4-triazol-3-yl)piperidin-1-yl]pyridin-3-yl]pyridine
C18 H19 F N6
AJIAMIPUWJQSPR-UHFFFAOYSA-N
 Ligand Interaction
SO4
Query on SO4

Download Ideal Coordinates CCD File 
A, B, C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ZN
Query on ZN

Download Ideal Coordinates CCD File 
A, B, C
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

Download Ideal Coordinates CCD File 
A, B, C
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
S77Ki:  20   nM  Binding MOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.72 Å
  • R-Value Free: 0.183 
  • R-Value Work: 0.158 
  • R-Value Observed: 0.159 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.14α = 90
b = 149.81β = 97.18
c = 95.98γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
Aimlessdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-09-19
    Type: Initial release
  • Version 1.1: 2018-12-05
    Changes: Data collection, Database references