4NSW

Crystal structure of the BAR-PH domain of ACAP1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.214 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A PH Domain in ACAP1 Possesses Key Features of the BAR Domain in Promoting Membrane Curvature

Pang, X.Fan, J.Zhang, Y.Zhang, K.Gao, B.Ma, J.Li, J.Deng, Y.Zhou, Q.Egelman, E.H.Hsu, V.W.Sun, F.

(2014) Dev Cell 31: 73-86

  • DOI: 10.1016/j.devcel.2014.08.020
  • Primary Citation of Related Structures:  
    4CKG, 4CKH, 4NSW

  • PubMed Abstract: 
  • The BAR (Bin-Amphiphysin-Rvs) domain undergoes dimerization to produce a curved protein structure, which superimposes onto membrane through electrostatic interactions to sense and impart membrane curvature. In some cases, a BAR domain also possesses an amphipathic helix that inserts into the membrane to induce curvature ...

    The BAR (Bin-Amphiphysin-Rvs) domain undergoes dimerization to produce a curved protein structure, which superimposes onto membrane through electrostatic interactions to sense and impart membrane curvature. In some cases, a BAR domain also possesses an amphipathic helix that inserts into the membrane to induce curvature. ACAP1 (Arfgap with Coil coil, Ankyrin repeat, and PH domain protein 1) contains a BAR domain. Here, we show that this BAR domain can neither bind membrane nor impart curvature, but instead requires a neighboring PH (Pleckstrin Homology) domain to achieve these functions. Specific residues within the PH domain are responsible for both membrane binding and curvature generation. The BAR domain adjacent to the PH domain instead interacts with the BAR domains of neighboring ACAP1 proteins to enable clustering at the membrane. Thus, we have uncovered the molecular basis for an unexpected and unconventional collaboration between PH and BAR domains in membrane bending.


    Organizational Affiliation

    National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; Center for Biological Imaging, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China. Electronic address: feisun@ibp.ac.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Arf-GAP with coiled-coil, ANK repeat and PH domain-containing protein 1A, B382Homo sapiensMutation(s): 0 
Gene Names: ACAP1CENTB1KIAA0050
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q15027 (Homo sapiens)
Explore Q15027 
Go to UniProtKB:  Q15027
PHAROS:  Q15027
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ15027
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.211 
  • R-Value Observed: 0.214 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.46α = 90
b = 59.72β = 91.4
c = 168.95γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
SOLVEphasing
RESOLVEmodel building
OASISmodel building
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
RESOLVEphasing
OASISphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2014-10-15
    Type: Initial release
  • Version 1.1: 2014-10-22
    Changes: Database references
  • Version 1.2: 2017-11-22
    Changes: Refinement description