Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 34.64 kDa 
• Atom Count: 2138 
• Residue Count: 265 
• Unique protein chains: 2

1HES

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

• DOI: 10.2210/pdb1HES/pdb

• Classification: ENDOCYTOSIS/EXOCYTOSIS
• Organism(s): Rattus norvegicus, Homo sapiens
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2000-11-24 Released: 2001-05-31 
• Deposition Author(s): Owen, D.J., Evans, P.R., Green, S.A.

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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 

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

• PubMed: 11247301 
• 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'. 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.

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Related Citations: 

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

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
CLATHRIN COAT ASSEMBLY PROTEIN AP50	A	285	Rattus norvegicus	Mutation(s): 0  Gene Names: AP50, Ap2m1
Find proteins for P84092 (Rattus norvegicus) Explore P84092  Go to UniProtKB:  P84092

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
P-SELECTIN PEPTIDE	P	18	Homo sapiens	Mutation(s): 0  Gene Names: SELP, GMRP, GRMP
Find proteins for P16109 (Homo sapiens) Explore P16109  Go to UniProtKB:  P16109
NIH Common Fund Data Resources
PHAROS:  P16109 GTEx:  ENSG00000174175

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 = 125.72	α = 90
b = 125.72	β = 90
c = 75.27	γ = 120

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2000-11-24 
• Released Date: 2001-05-31 
Deposition Author(s): Owen, D.J., Evans, P.R., Green, S.A.

Revision History 

• 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