5I66

X-ray structure of the Fab fragment of 8B6, a murine monoclonal antibody specific for the human serotonin transporter


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.624 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.178 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

X-ray structures and mechanism of the human serotonin transporter.

Coleman, J.A.Green, E.M.Gouaux, E.

(2016) Nature 532: 334-339

  • DOI: 10.1038/nature17629
  • Primary Citation of Related Structures:  5I6X, 5I6Z, 5I71, 5I73, 5I74, 5I75

  • PubMed Abstract: 
  • The serotonin transporter (SERT) terminates serotonergic signalling through the sodium- and chloride-dependent reuptake of neurotransmitter into presynaptic neurons. SERT is a target for antidepressant and psychostimulant drugs, which block reuptake ...

    The serotonin transporter (SERT) terminates serotonergic signalling through the sodium- and chloride-dependent reuptake of neurotransmitter into presynaptic neurons. SERT is a target for antidepressant and psychostimulant drugs, which block reuptake and prolong neurotransmitter signalling. Here we report X-ray crystallographic structures of human SERT at 3.15 Å resolution bound to the antidepressants (S)-citalopram or paroxetine. Antidepressants lock SERT in an outward-open conformation by lodging in the central binding site, located between transmembrane helices 1, 3, 6, 8 and 10, directly blocking serotonin binding. We further identify the location of an allosteric site in the complex as residing at the periphery of the extracellular vestibule, interposed between extracellular loops 4 and 6 and transmembrane helices 1, 6, 10 and 11. Occupancy of the allosteric site sterically hinders ligand unbinding from the central site, providing an explanation for the action of (S)-citalopram as an allosteric ligand. These structures define the mechanism of antidepressant action in SERT, and provide blueprints for future drug design.


    Organizational Affiliation

    Vollum Institute, Oregon Health &Science University, Portland, Oregon 97239, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
8B6 antibody, heavy chain
A
221N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
8B6 antibody, light chain
B
214N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.624 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.178 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 81.560α = 90.00
b = 81.560β = 90.00
c = 142.170γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationCountryGrant Number
National Institutes of HealthUnited States--
Howard Hughes Medical InstituteUnited States--

Revision History 

  • Version 1.0: 2016-04-13
    Type: Initial release
  • Version 1.1: 2016-04-20
    Type: Database references
  • Version 1.2: 2016-05-04
    Type: Database references