1HES

MU2 ADAPTIN SUBUNIT (AP50) OF AP2 ADAPTOR (SECOND DOMAIN), COMPLEXED WITH P-selectin INTERNALIZATION PEPTIDE SHLGTYGVFTNAA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.213 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

A Third Specificity-Determining Site in Mu 2 Adaptin for Sequences Upstream of Yxx Phi Sorting Motifs

Owen, D.J.Setiadi, H.Evans, P.R.Mcever, R.P.Green, S.A.

(2001) Traffic 2: 105

  • DOI: 10.1034/j.1600-0854.2001.020205.x
  • Primary Citation of Related Structures:  
    1HES

  • PubMed Abstract: 
  • Internalization signals of the Yxx phi type (phi = bulky hydrophobic side chain) interact with the mu 2 chain of AP-2 adaptors. Internalization activity is intolerant of non-conservative substitution of either the tyrosine or the phi side chains, which bind to hydrophobic pockets in mu 2 adaptin in a conformation described as 'a two pinned plug into a socket' ...

    Internalization signals of the Yxx phi type (phi = bulky hydrophobic side chain) interact with the mu 2 chain of AP-2 adaptors. Internalization activity is intolerant of non-conservative substitution of either the tyrosine or the phi side chains, which bind to hydrophobic pockets in mu 2 adaptin in a conformation described as 'a two pinned plug into a socket'. P-selectin, a type I transmembrane protein, contains the Yxx phi-like sequence YGVF in its cytoplasmic domain, but substitution of either the tyrosine or phenylalanine with alanine in the full-length protein causes only small changes in the rate of endocytosis. It is shown here that the sequence YGVF contained within a peptide corresponding to the 17 COOH-terminal amino acids of P-selectin binds to mu 2 adaptin in the same fashion previously seen for other Yxx phi motifs. In addition, the P-selectin peptide binds to a third hydrophobic pocket in mu 2 adaptin through a leucine at position Y-3 in the peptide. This structure suggests that some sequences can function as a 'three pinned plug', in which internalization activity is not critically dependent on any one of the three interacting side chains.


    Related Citations: 
    • A Structural Explanation for the Recognition of Tyrosine-Based Endocytotic Signals
      Owen, D.J., Evans, P.R.
      (1998) Science 282: 1327

    Organizational Affiliation

    Medical Research Council Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CLATHRIN COAT ASSEMBLY PROTEIN AP50A285Rattus norvegicusMutation(s): 0 
Gene Names: AP50Ap2m1
UniProt
Find proteins for P84092 (Rattus norvegicus)
Explore P84092 
Go to UniProtKB:  P84092
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
P-SELECTIN PEPTIDEB [auth P]18Homo sapiensMutation(s): 0 
Gene Names: SELPGMRPGRMP
UniProt & NIH Common Fund Data Resources
Find proteins for P16109 (Homo sapiens)
Explore P16109 
Go to UniProtKB:  P16109
PHAROS:  P16109
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.213 
  • Space Group: P 64
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 125.72α = 90
b = 125.72β = 90
c = 75.27γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-05-31
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-10-24
    Changes: Data collection, Source and taxonomy
  • Version 1.4: 2019-05-08
    Changes: Data collection, Experimental preparation
  • Version 1.5: 2019-05-15
    Changes: Data collection, Experimental preparation