Crystal structure of the mouse cavin1 HR1 domain

Experimental Data Snapshot

  • Resolution: 3.00 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.230 

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Structural insights into the organization of the cavin membrane coat complex

Kovtun, O.Tillu, V.A.Jung, W.Leneva, N.Ariotti, N.Chaudhary, N.Mandyam, R.A.Ferguson, C.Morgan, G.P.Johnston, W.A.Harrop, S.J.Alexandrov, K.Parton, R.G.Collins, B.M.

(2014) Dev Cell 31: 405-419

  • DOI: https://doi.org/10.1016/j.devcel.2014.10.002
  • Primary Citation of Related Structures:  
    4QKV, 4QKW

  • PubMed Abstract: 

    Caveolae are cell-surface membrane invaginations that play critical roles in cellular processes including signaling and membrane homeostasis. The cavin proteins, in cooperation with caveolins, are essential for caveola formation. Here we show that a minimal N-terminal domain of the cavins, termed HR1, is required and sufficient for their homo- and hetero-oligomerization. Crystal structures of the mouse cavin1 and zebrafish cavin4a HR1 domains reveal highly conserved trimeric coiled-coil architectures, with intersubunit interactions that determine the specificity of cavin-cavin interactions. The HR1 domain contains a basic surface patch that interacts with polyphosphoinositides and coordinates with additional membrane-binding sites within the cavin C terminus to facilitate membrane association and remodeling. Electron microscopy of purified cavins reveals the existence of large assemblies, composed of a repeating rod-like structural element, and we propose that these structures polymerize through membrane-coupled interactions to form the unique striations observed on the surface of caveolae in vivo.

  • Organizational Affiliation

    Institute for Molecular Bioscience, The University of Queensland, St. Lucia, QLD 4072, Australia; Centre for Microscopy and Microanalysis, The University of Queensland, St. Lucia, QLD 4072, Australia. Electronic address: r.parton@imb.uq.edu.au.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Polymerase I and transcript release factor
A, B, C
111Mus musculusMutation(s): 0 
Gene Names: Ptrf
Find proteins for O54724 (Mus musculus)
Explore O54724 
Go to UniProtKB:  O54724
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO54724
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 3.00 Å
  • R-Value Free: 0.283 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.230 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.03α = 90
b = 98.69β = 90
c = 104.84γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-03-18
    Type: Initial release