2IV8

beta appendage in complex with b-arrestin peptide

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.369 
  • R-Value Work: 0.213 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history. 

Literature

Role of the Ap2 Beta-Appendage Hub in Recruiting Partners for Clathrin-Coated Vesicle Assembly.

Schmid, E.M., Ford, M.G.J., Burtey, A., Praefcke, G.J.K., Peak-Chew, S., Mills, I.G., Benmerah, A., Mcmahon, H.T.

(2006) Plos Biol. 4: E262

  • DOI: 10.1371/journal.pbio.0040262
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Adaptor protein complex 2 alpha and beta-appendage domains act as hubs for the assembly of accessory protein networks involved in clathrin-coated vesicle formation. We identify a large repertoire of beta-appendage interactors by mass spectrometry. Th ...

    Adaptor protein complex 2 alpha and beta-appendage domains act as hubs for the assembly of accessory protein networks involved in clathrin-coated vesicle formation. We identify a large repertoire of beta-appendage interactors by mass spectrometry. These interact with two distinct ligand interaction sites on the beta-appendage (the "top" and "side" sites) that bind motifs distinct from those previously identified on the alpha-appendage. We solved the structure of the beta-appendage with a peptide from the accessory protein Eps15 bound to the side site and with a peptide from the accessory cargo adaptor beta-arrestin bound to the top site. We show that accessory proteins can bind simultaneously to multiple appendages, allowing these to cooperate in enhancing ligand avidities that appear to be irreversible in vitro. We now propose that clathrin, which interacts with the beta-appendage, achieves ligand displacement in vivo by self-polymerisation as the coated pit matures. This changes the interaction environment from liquid-phase, affinity-driven interactions, to interactions driven by solid-phase stability ("matricity"). Accessory proteins that interact solely with the appendages are thereby displaced to areas of the coated pit where clathrin has not yet polymerised. However, proteins such as beta-arrestin (non-visual arrestin) and autosomal recessive hypercholesterolemia protein, which have direct clathrin interactions, will remain in the coated pits with their interacting receptors.

    Organizational Affiliation: 

    Medical Research Council Laboratory of Molecular Biology, Cambridge, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AP-2 COMPLEX SUBUNIT BETA-1
A
238Homo sapiensMutation(s): 0 
Gene Names: AP2B1 (ADTB2, CLAPB1)
Find proteins for P63010 (Homo sapiens)
Go to Gene View: AP2B1
Go to UniProtKB:  P63010
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
BETA-ARRESTIN-1
P, Q
20Homo sapiensMutation(s): 0 
Gene Names: ARRB1 (ARR1)
Find proteins for P49407 (Homo sapiens)
Go to Gene View: ARRB1
Go to UniProtKB:  P49407
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.8 Å
  • R-Value Free: 0.369 
  • R-Value Work: 0.213 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 36.952α = 90.00
b = 35.484β = 90.00
c = 190.624γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALAdata scaling
PHASERphasing
MOSFLMdata reduction

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-06-12
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance