1H0A

Epsin ENTH bound to Ins(1,4,5)P3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.185 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Curvature of Clathrin-Coated Pits Driven by Epsin

Ford, M.G.J.Mills, I.Peter, B.Vallis, Y.Praefcke, G.Evans, P.R.Mcmahon, H.T.

(2002) Nature 419: 361

  • DOI: 10.1038/nature01020
  • Also Cited By: 5LP0

  • PubMed Abstract: 
  • Clathrin-mediated endocytosis involves cargo selection and membrane budding into vesicles with the aid of a protein coat. Formation of invaginated pits on the plasma membrane and subsequent budding of vesicles is an energetically demanding process th ...

    Clathrin-mediated endocytosis involves cargo selection and membrane budding into vesicles with the aid of a protein coat. Formation of invaginated pits on the plasma membrane and subsequent budding of vesicles is an energetically demanding process that involves the cooperation of clathrin with many different proteins. Here we investigate the role of the brain-enriched protein epsin 1 in this process. Epsin is targeted to areas of endocytosis by binding the membrane lipid phosphatidylinositol-4,5-bisphosphate (PtdIns(4,5)P(2)). We show here that epsin 1 directly modifies membrane curvature on binding to PtdIns(4,5)P(2) in conjunction with clathrin polymerization. We have discovered that formation of an amphipathic alpha-helix in epsin is coupled to PtdIns(4,5)P(2) binding. Mutation of residues on the hydrophobic region of this helix abolishes the ability to curve membranes. We propose that this helix is inserted into one leaflet of the lipid bilayer, inducing curvature. On lipid monolayers epsin alone is sufficient to facilitate the formation of clathrin-coated invaginations.


    Organizational Affiliation

    MRC Laboratory of Molecular Biology, Cambridge, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EPSIN
A
158Rattus norvegicusMutation(s): 0 
Gene Names: Epn1
Find proteins for O88339 (Rattus norvegicus)
Go to UniProtKB:  O88339
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
I3P
Query on I3P

Download SDF File 
Download CCD File 
A
D-MYO-INOSITOL-1,4,5-TRIPHOSPHATE
C6 H15 O15 P3
MMWCIQZXVOZEGG-XJTPDSDZSA-N
 Ligand Interaction
DIO
Query on DIO

Download SDF File 
Download CCD File 
A
1,4-DIETHYLENE DIOXIDE
C4 H8 O2
RYHBNJHYFVUHQT-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
I3PKd: 3600 nM BINDINGMOAD
I3PKd: 3600 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.185 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 41.209α = 90.00
b = 95.823β = 90.00
c = 118.151γ = 90.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
AMoREphasing
REFMACrefinement
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2002-10-03
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance