6R7Y

CryoEM structure of calcium-bound human TMEM16K / Anoctamin 10 in detergent (low Ca2+, closed form)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.2 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.4 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:  

  • 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

    Department of Biochemistry, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY, 10461-1602, USA.,Department of Cardiology, Washington University in St. Louis, St. Louis, MO, 63110, USA.,Department of Biochemistry, Oxford University, Oxford, OX1 3QT, UK.,OxSyBio, Atlas Building, Harwell Campus, Didcot, Oxfordshire, OX11 0QX, UK.,Vertex Pharmaceuticals Ltd, Milton Park, Oxfordshire, OX14 4RW, UK.,Nuffield Division of Clinical Laboratory Sciences, Oxford University, Oxford, OX3 9DU, UK.,Department of Anesthesiology, Weill Cornell Medical School, 25 East 68th Street, New York, NY, 10065, USA.,Novo Nordisk A/S, Novo Nordisk Park, 2760, Måløv, Denmark.,Division of Structural Biology, Wellcome Centre for Human Genetics, University of Oxford, Roosevelt Drive, Oxford, OX3 7BN, UK.,Department of Biochemistry, Weill Cornell Medical School, 1300 York Avenue, New York, NY, 10065, USA.,Structural Genomics Consortium, Nuffield Department of Medicine, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, OX3 7DQ, UK.,Department of Biochemistry, University of Oxford, South Parks Road, Oxford, OX1 3QT, UK.,Oxford Nanopore Technologies, Oxford Science Park, Oxford, OX4 4DQ, UK.,Nuffield Department of Rheumatology, Orthopaedics and Musculoskeletal Sciences, University of Oxford, Windmill Road, Oxford, OX3 7LD, UK.,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.,Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK.,Department of Physiology and Biophysics, Weill Cornell Medical School, 1300 York Avenue, New York, NY, 10065, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Anoctamin-10
A, B
667Homo sapiensMutation(s): 0 
Gene Names: ANO10 (TMEM16K)
Find proteins for Q9NW15 (Homo sapiens)
Go to Gene View: ANO10
Go to UniProtKB:  Q9NW15
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

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

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.2 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome TrustUnited Kingdom106169/Z/14/Z
European CommissionUnited Kingdom115766

Revision History 

  • Version 1.0: 2019-05-01
    Type: Initial release
  • Version 1.1: 2019-09-11
    Type: Data collection, Database references
  • Version 1.2: 2019-09-18
    Type: Data collection, Database references
  • Version 1.3: 2019-11-20
    Type: Database references
  • Version 1.4: 2019-12-18
    Type: Other