Crystal Structure of the BAR-PH domain of human APPL1

Experimental Data Snapshot

  • Resolution: 2.60 Å
  • R-Value Free: 0.327 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.236 

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Crystal Structures of the BAR-PH and PTB Domains of Human APPL1

Li, J.Mao, X.Dong, L.Q.Liu, F.Tong, L.

(2007) Structure 15: 525-533

  • DOI: https://doi.org/10.1016/j.str.2007.03.011
  • Primary Citation of Related Structures:  
    2ELA, 2ELB

  • PubMed Abstract: 

    APPL1 interacts with adiponectin receptors and other important signaling molecules. It contains a BAR and a PH domain near its N terminus, and the two domains may function as a unit (BAR-PH domain). We report here the crystal structures of the BAR-PH and PTB domains of human APPL1. The structures reveal novel features for BAR domain dimerization and for the interactions between the BAR and PH domains. The BAR domain dimer of APPL1 contains two four-helical bundles, whereas other BAR domain dimers have only three helices in each bundle. The PH domain is located at the opposite ends of the BAR domain dimer. Yeast two-hybrid assays confirm the interactions between the BAR and PH domains. Lipid binding assays show that the BAR, PH, and PTB domains can bind phospholipids. The ability of APPL1 to interact with multiple signaling molecules and phospholipids supports an important role for this adaptor in cell signaling.

  • Organizational Affiliation

    Department of Biological Sciences, Columbia University, New York, NY 10027, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Adapter protein containing PH domain, PTB domain and leucine zipper motif 1396Homo sapiensMutation(s): 15 
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UKG1 (Homo sapiens)
Explore Q9UKG1 
Go to UniProtKB:  Q9UKG1
GTEx:  ENSG00000157500 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UKG1
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on MSE
Experimental Data & Validation

Experimental Data

  • Resolution: 2.60 Å
  • R-Value Free: 0.327 
  • R-Value Work: 0.236 
  • R-Value Observed: 0.236 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 100.568α = 90
b = 104.126β = 90
c = 37.074γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-05-29
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance