5OC9

Crystal Structure of human TMEM16K / Anoctamin 10


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The structural basis of lipid scrambling and inactivation in the endoplasmic reticulum scramblase TMEM16K.

Bushell, S.R.Pike, A.C.W.Falzone, M.E.Rorsman, N.J.G.Ta, C.M.Corey, R.A.Newport, T.D.Christianson, J.C.Scofano, L.F.Shintre, C.A.Tessitore, A.Chu, A.Wang, Q.Shrestha, L.Mukhopadhyay, S.M.M.Love, J.D.Burgess-Brown, N.A.Sitsapesan, R.Stansfeld, P.J.Huiskonen, J.T.Tammaro, P.Accardi, A.Carpenter, E.P.

(2019) Nat Commun 10: 3956-3956

  • DOI: 10.1038/s41467-019-11753-1
  • Primary Citation of Related Structures:  
    5OC9, 6R65, 6R7X, 6R7Z, 6R7Y

  • PubMed Abstract: 
  • Membranes in cells have defined distributions of lipids in each leaflet, controlled by lipid scramblases and flip/floppases. However, for some intracellular membranes such as the endoplasmic reticulum (ER) the scramblases have not been identified. Me ...

    Membranes in cells have defined distributions of lipids in each leaflet, controlled by lipid scramblases and flip/floppases. However, for some intracellular membranes such as the endoplasmic reticulum (ER) the scramblases have not been identified. Members of the TMEM16 family have either lipid scramblase or chloride channel activity. Although TMEM16K is widely distributed and associated with the neurological disorder autosomal recessive spinocerebellar ataxia type 10 (SCAR10), its location in cells, function and structure are largely uncharacterised. Here we show that TMEM16K is an ER-resident lipid scramblase with a requirement for short chain lipids and calcium for robust activity. Crystal structures of TMEM16K show a scramblase fold, with an open lipid transporting groove. Additional cryo-EM structures reveal extensive conformational changes from the cytoplasmic to the ER side of the membrane, giving a state with a closed lipid permeation pathway. Molecular dynamics simulations showed that the open-groove conformation is necessary for scramblase activity.


    Organizational Affiliation

    Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ, UK. liz.carpenter@sgc.ox.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Anoctamin-10AB667Homo sapiensMutation(s): 0 
Gene Names: ANO10TMEM16K
Find proteins for Q9NW15 (Homo sapiens)
Explore Q9NW15 
Go to UniProtKB:  Q9NW15
NIH Common Fund Data Resources
PHAROS  Q9NW15
Protein Feature View
Expand
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
79M
Query on 79M

Download CCD File 
A, B
(2R)-2,3-dihydroxypropyl (7Z)-hexadec-7-enoate
C19 H36 O4
OWGMAJRKMYGYBQ-HJCTWCACSA-N
 Ligand Interaction
CA
Query on CA

Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.20 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.229 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.15α = 90
b = 153.59β = 90
c = 218.78γ = 90
Software Package:
Software NamePurpose
BUSTERrefinement
XDSdata reduction
Aimlessdata scaling
MrBUMPphasing
MR-Rosettaphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom--

Revision History 

  • Version 1.0: 2018-07-25
    Type: Initial release
  • Version 1.1: 2019-06-12
    Changes: Data collection, Structure summary
  • Version 1.2: 2019-11-20
    Changes: Database references