4BW5

Crystal structure of human two pore domain potassium ion channel TREK2 (K2P10.1)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.238 

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This is version 1.3 of the entry. See complete history


Literature

K2P Channel Gating Mechanisms Revealed by Structures of Trek-2 and a Complex with Prozac

Pike, A.C.W.Mackenzie, A.Mcclenaghan, C.Aryal, P.Dong, L.Quigley, A.Grieben, M.Goubin, S.Mukhopadhyay, S.Ruda, G.F.Clausen, M.V.Cao, L.Brennan, P.E.Burgess-Brown, N.A.Sansom, M.S.P.Tucker, S.J.Carpenter, E.P.

(2015) Science 347: 1256

  • DOI: 10.1126/science.1261512
  • Primary Citation of Related Structures:  
    4BW5, 4XDJ, 4XDK, 4XDL

  • PubMed Abstract: 
  • TREK-2 (KCNK10/K2P10), a two-pore domain potassium (K2P) channel, is gated by multiple stimuli such as stretch, fatty acids, and pH and by several drugs. However, the mechanisms that control channel gating are unclear. Here we present crystal structures of the human TREK-2 channel (up to 3 ...

    TREK-2 (KCNK10/K2P10), a two-pore domain potassium (K2P) channel, is gated by multiple stimuli such as stretch, fatty acids, and pH and by several drugs. However, the mechanisms that control channel gating are unclear. Here we present crystal structures of the human TREK-2 channel (up to 3.4 angstrom resolution) in two conformations and in complex with norfluoxetine, the active metabolite of fluoxetine (Prozac) and a state-dependent blocker of TREK channels. Norfluoxetine binds within intramembrane fenestrations found in only one of these two conformations. Channel activation by arachidonic acid and mechanical stretch involves conversion between these states through movement of the pore-lining helices. These results provide an explanation for TREK channel mechanosensitivity, regulation by diverse stimuli, and possible off-target effects of the serotonin reuptake inhibitor Prozac.


    Organizational Affiliation

    Structural Genomics Consortium, University of Oxford, Oxford OX3 7DQ, UK. OXION Initiative in Ion Channels and Disease, University of Oxford, Oxford OX1 3PN, UK. liz.carpenter@sgc.ox.ac.uk stephen.tucker@physics.ox.ac.uk.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
POTASSIUM CHANNEL SUBFAMILY K MEMBER 10A, B, C, D282Homo sapiensMutation(s): 0 
Gene Names: KCNK10TREK2
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P57789 (Homo sapiens)
Explore P57789 
Go to UniProtKB:  P57789
PHAROS:  P57789
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP57789
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.237 
  • R-Value Observed: 0.238 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.83α = 90
b = 96.96β = 92.58
c = 103.7γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment 



Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2013-07-31
    Type: Initial release
  • Version 1.1: 2015-03-18
    Changes: Database references
  • Version 1.2: 2015-03-25
    Changes: Database references
  • Version 1.3: 2019-03-06
    Changes: Data collection, Experimental preparation, Other