7RWB

AP2 bound to the APA domain of SGIP in the presence of heparin


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis of an endocytic checkpoint that primes the AP2 clathrin adaptor for cargo internalization.

Partlow, E.A.Cannon, K.S.Hollopeter, G.Baker, R.W.

(2022) Nat Struct Mol Biol 29: 339-347

  • DOI: 10.1038/s41594-022-00749-z
  • Primary Citation of Related Structures:  
    7RW8, 7RW9, 7RWA, 7RWB, 7RWC

  • PubMed Abstract: 
  • Clathrin-mediated endocytosis (CME) is the main route of internalization from the plasma membrane. It is known that the heterotetrameric AP2 clathrin adaptor must open to simultaneously engage membrane and endocytic cargo, yet it is unclear how transmembrane cargos are captured to catalyze CME ...

    Clathrin-mediated endocytosis (CME) is the main route of internalization from the plasma membrane. It is known that the heterotetrameric AP2 clathrin adaptor must open to simultaneously engage membrane and endocytic cargo, yet it is unclear how transmembrane cargos are captured to catalyze CME. Using cryogenic-electron microscopy, we discover a new way in which mouse AP2 can reorganize to expose membrane- and cargo-binding pockets, which is not observed in clathrin-coated structures. Instead, it is stimulated by endocytic pioneer proteins called muniscins, which do not enter vesicles. Muniscin-engaged AP2 is primed to rearrange into the vesicle-competent conformation on binding the tyrosine cargo internalization motif (YxxΦ). We propose adaptor priming as a checkpoint to ensure cargo internalization.


    Organizational Affiliation

    UNC Lineberger Comprehensive Cancer Center, University of North Carolina (UNC) Chapel Hill School of Medicine, Chapel Hill, NC, USA. baker@med.unc.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
AP-2 complex subunit alpha-2A,
E [auth a]
630Mus musculusMutation(s): 0 
Gene Names: Ap2a2Adtab
UniProt & NIH Common Fund Data Resources
Find proteins for P17427 (Mus musculus)
Explore P17427 
Go to UniProtKB:  P17427
IMPC:  MGI:101920
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP17427
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
AP-2 complex subunit betaB,
F [auth b]
591Mus musculusMutation(s): 0 
Gene Names: Ap2b1Clapb1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9DBG3 (Mus musculus)
Explore Q9DBG3 
Go to UniProtKB:  Q9DBG3
IMPC:  MGI:1919020
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9DBG3
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
AP-2 complex subunit muC [auth M],
G [auth m]
435Mus musculusMutation(s): 0 
Gene Names: Ap2m1Clapm1
UniProt
Find proteins for P84091 (Mus musculus)
Explore P84091 
Go to UniProtKB:  P84091
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP84091
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
AP-2 complex subunit sigmaD [auth S],
H [auth s]
142Mus musculusMutation(s): 0 
Gene Names: Ap2s1Ap17Claps2
UniProt & NIH Common Fund Data Resources
Find proteins for P62743 (Mus musculus)
Explore P62743 
Go to UniProtKB:  P62743
IMPC:  MGI:2141861
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP62743
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.90 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01 GM127548-01A1

Revision History  (Full details and data files)

  • Version 1.0: 2022-03-30
    Type: Initial release
  • Version 1.1: 2022-04-13
    Changes: Database references
  • Version 1.2: 2022-04-27
    Changes: Database references