2YME

Crystal structure of a mutant binding protein (5HTBP-AChBP) in complex with granisetron


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.170 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural Basis of Ligand Recognition in 5-Ht3 Receptors.

Kesters, D.Thompson, A.J.Brams, M.Van Elk, R.Spurny, R.Geitmann, M.Villalgordo, J.M.Guskov, A.Helena Danielson, U.Lummis, S.C.R.Smit, A.B.Ulens, C.

(2013) Embo Rep. 14: 49

  • DOI: 10.1038/embor.2012.189
  • Primary Citation of Related Structures:  2YMD

  • PubMed Abstract: 
  • The 5-HT(3) receptor is a pentameric serotonin-gated ion channel, which mediates rapid excitatory neurotransmission and is the target of a therapeutically important class of anti-emetic drugs, such as granisetron. We report crystal structures of a bi ...

    The 5-HT(3) receptor is a pentameric serotonin-gated ion channel, which mediates rapid excitatory neurotransmission and is the target of a therapeutically important class of anti-emetic drugs, such as granisetron. We report crystal structures of a binding protein engineered to recognize the agonist serotonin and the antagonist granisetron with affinities comparable to the 5-HT(3) receptor. In the serotonin-bound structure, we observe hydrophilic interactions with loop E-binding site residues, which might enable transitions to channel opening. In the granisetron-bound structure, we observe a critical cation-π interaction between the indazole moiety of the ligand and a cationic centre in loop D, which is uniquely present in the 5-HT(3) receptor. We use a series of chemically tuned granisetron analogues to demonstrate the energetic contribution of this electrostatic interaction to high-affinity ligand binding in the human 5-HT(3) receptor. Our study offers the first structural perspective on recognition of serotonin and antagonism by anti-emetics in the 5-HT(3) receptor.


    Organizational Affiliation

    Laboratory of Structural Neurobiology, KULeuven, Leuven, Belgium.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SOLUBLE ACETYLCHOLINE RECEPTOR
A, B, C, D, E, F, G, H, I, J
205Aplysia californicaN/A
Find proteins for Q8WSF8 (Aplysia californica)
Go to UniProtKB:  Q8WSF8
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PO4
Query on PO4

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Download CCD File 
A, C, E, G, H
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
NA
Query on NA

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Download CCD File 
I
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
CWB
Query on CWB

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Download CCD File 
A, B, C, D, E, F, G, H, I, J
1-methyl-N-[(1R,5S)-9-methyl-9-azabicyclo[3.3.1]nonan-3-yl]indazole-3-carboxamide
GRANISETRON
C18 H24 N4 O
MFWNKCLOYSRHCJ-BTTYYORXSA-N
 Ligand Interaction
NAG
Query on NAG

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Download CCD File 
A, B, C, D, E, F, H, I, J
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
CWBKd: 549 nM BINDINGMOAD
CWBKd: 22 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.170 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 83.090α = 90.00
b = 138.900β = 91.07
c = 119.890γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHENIXrefinement
SCALAdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-12-26
    Type: Initial release
  • Version 1.1: 2013-01-30
    Type: Database references