Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 27.83 kDa 
• Atom Count: 2201 
• Residue Count: 247 
• Unique protein chains: 1

1QTS

CRYSTAL STRUCTURE OF THE AP-2 CLATHRIN ADAPTOR ALPHA-APPENDAGE

• DOI: 10.2210/pdb1QTS/pdb
• BMRB: 6034

• Classification: MEMBRANE PROTEIN
• Organism(s): Mus musculus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1999-06-29 Released: 1999-07-12 
• Deposition Author(s): Traub, L.M., Downs, M.A., Westrich, J.L., Fremont, D.H.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.209 
• R-Value Work: 0.178 

Literature

Crystal structure of the alpha appendage of AP-2 reveals a recruitment platform for clathrin-coat assembly.

Traub, L.M., Downs, M.A., Westrich, J.L., Fremont, D.H.

(1999) Proc Natl Acad Sci U S A 96: 8907-8912

• PubMed: 10430869 
• DOI: 10.1073/pnas.96.16.8907
• Primary Citation of Related Structures:  
  1QTS, 1QTP


• PubMed Abstract: 
  

AP-2 adaptors regulate clathrin-bud formation at the cell surface by recruiting clathrin trimers to the plasma membrane and by selecting certain membrane proteins for inclusion within the developing clathrin-coat structure. These functions are performed by discrete subunits of the adaptor heterotetramer. The carboxyl-terminal appendage of the AP-2 alpha subunit appears to regulate the translocation of several endocytic accessory proteins to the bud site. We have determined the crystal structure of the alpha appendage at 1.4-A resolution by multiwavelength anomalous diffraction phasing. It is composed of two distinct structural modules, a beta-sandwich domain and a mixed alpha-beta platform domain. Structure-based mutagenesis shows that alterations to the molecular surface of a highly conserved region on the platform domain differentially affect associations of the appendage with amphiphysin, eps15, epsin, and AP180, revealing a common protein-binding interface.

---

Organizational Affiliation: 

Department of Internal Medicine, Washington University School of Medicine, 660 South Euclid Avenue, St. Louis, MO 63110, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
AP-2 CLATHRIN ADAPTOR ALPHA SUBUNIT (ALPHA-ADAPTIN C)	A	247	Mus musculus	Mutation(s): 0  Gene Names: Ap2a2, Adtab
Find proteins for P17427 (Mus musculus) Explore P17427  Go to UniProtKB:  P17427
NIH Common Fund Data Resources
IMPC:  MGI:101920

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.209 
• R-Value Work: 0.178 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 40.807	α = 90
b = 72.749	β = 99.69
c = 41.861	γ = 90

Software Package:

Software Name	Purpose
AMoRE	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-06-29 
• Released Date: 1999-07-12 
Deposition Author(s): Traub, L.M., Downs, M.A., Westrich, J.L., Fremont, D.H.

Revision History 

• Version 1.0: 1999-07-12
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance