5AAN

Crystal structure of Drosophila NCS-1 bound to penothiazine FD44


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Interference of the complex between NCS-1 and Ric8a with phenothiazines regulates synaptic function and is an approach for fragile X syndrome.

Mansilla, A.Chaves-Sanjuan, A.Campillo, N.E.Semelidou, O.Martinez-Gonzalez, L.Infantes, L.Gonzalez-Rubio, J.M.Gil, C.Conde, S.Skoulakis, E.M.Ferrus, A.Martinez, A.Sanchez-Barrena, M.J.

(2017) Proc. Natl. Acad. Sci. U.S.A. 114: E999-E1008

  • DOI: 10.1073/pnas.1611089114
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The protein complex formed by the Ca <sup>2+ </sup> sensor neuronal calcium sensor 1 (NCS-1) and the guanine exchange factor protein Ric8a coregulates synapse number and probability of neurotransmitter release, emerging as a potential therapeutic tar ...

    The protein complex formed by the Ca 2+ sensor neuronal calcium sensor 1 (NCS-1) and the guanine exchange factor protein Ric8a coregulates synapse number and probability of neurotransmitter release, emerging as a potential therapeutic target for diseases affecting synapses, such as fragile X syndrome (FXS), the most common heritable autism disorder. Using crystallographic data and the virtual screening of a chemical library, we identified a set of heterocyclic small molecules as potential inhibitors of the NCS-1/Ric8a interaction. The aminophenothiazine FD44 interferes with NCS-1/Ric8a binding, and it restores normal synapse number and associative learning in a Drosophila FXS model. The synaptic effects elicited by FD44 feeding are consistent with the genetic manipulation of NCS-1. The crystal structure of NCS-1 bound to FD44 and the structure-function studies performed with structurally close analogs explain the FD44 specificity and the mechanism of inhibition, in which the small molecule stabilizes a mobile C-terminal helix inside a hydrophobic crevice of NCS-1 to impede Ric8a interaction. Our study shows the drugability of the NCS-1/Ric8a interface and uncovers a suitable region in NCS-1 for development of additional drugs of potential use on FXS and related synaptic disorders.


    Organizational Affiliation

    Departamento de Neurobiología del Desarrollo, Instituto Cajal, Spanish National Research Council, 28002 Madrid, Spain.,Instituto de Química Médica, Spanish National Research Council, 28006 Madrid, Spain.,Centro de Investigaciones Biológicas, Spanish National Research Council, 28040 Madrid, Spain.,Division of Neuroscience, Biomedical Sciences Research Centre Alexander Fleming, 16672 Vari, Greece.,Departamento de Cristalografía y Biología Estructural, Instituto de Química Física Rocasolano, Spanish National Research Council, 28006 Madrid, Spain; xmjose@iqfr.csic.es.,Departamento de Cristalografía y Biología Estructural, Instituto de Química Física Rocasolano, Spanish National Research Council, 28006 Madrid, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CG5907-PA, ISOFORM A
A
187Drosophila melanogasterMutation(s): 1 
Gene Names: Frq2 (Dmel\CG5907, dNCS-1, Frq, frq, frq2, Frq2-RA)
Find proteins for Q9VWX8 (Drosophila melanogaster)
Go to UniProtKB:  Q9VWX8
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
XOC
Query on XOC

Download SDF File 
Download CCD File 
A
N-phenothiazin-10-yl-2-piperidin-1-yl-ethanamide
FD44
C19 H21 N3 O S
ALVVXSSFOOYRDP-UHFFFAOYSA-N
 Ligand Interaction
PG0
Query on PG0

Download SDF File 
Download CCD File 
A
2-(2-METHOXYETHOXY)ETHANOL
PEG 6000
C5 H12 O3
SBASXUCJHJRPEV-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
XOCKd: 71000 nM BINDINGMOAD
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.6 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.185 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 54.052α = 90.00
b = 54.961β = 90.00
c = 61.132γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
PHASERphasing
XDSdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-01-25
    Type: Initial release
  • Version 1.1: 2017-03-01
    Type: Database references
  • Version 1.2: 2017-03-08
    Type: Other
  • Version 1.3: 2017-12-27
    Type: Structure summary