Crystal Structure of mutant S554D for ArfGAP and ANK repeat domain of ACAP1

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.218 

wwPDB Validation   3D Report Full Report

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Mechanistic insights into regulated cargo binding by ACAP1 protein

Bai, M.Pang, X.Lou, J.Zhou, Q.Zhang, K.Ma, J.Li, J.Sun, F.Hsu, V.W.

(2012) J Biol Chem 287: 28675-28685

  • DOI: https://doi.org/10.1074/jbc.M112.378810
  • Primary Citation of Related Structures:  
    3JUE, 3T9K, 4F1P

  • PubMed Abstract: 

    Coat complexes sort protein cargoes into vesicular transport pathways. An emerging class of coat components has been the GTPase-activating proteins (GAPs) that act on the ADP-ribosylation factor (ARF) family of small GTPases. ACAP1 (ArfGAP with coiled-coil, ankyrin repeat, and PH domains protein 1) is an ARF6 GAP that also acts as a key component of a recently defined clathrin complex for endocytic recycling. Phosphorylation by Akt has been shown to enhance cargo binding by ACAP1 in explaining how integrin recycling is an example of regulated transport. We now shed further mechanistic insights into how this regulation is achieved at the level of cargo binding by ACAP1. We initially defined a critical sequence in the cytoplasmic domain of integrin β1 recognized by ACAP1 and showed that this sequence acts as a recycling sorting signal. We then pursued a combination of structural, modeling, and functional studies, which suggest that phosphorylation of ACAP1 relieves a localized mechanism of autoinhibition in regulating cargo binding. Thus, we have elucidated a key regulatory juncture that controls integrin recycling and also advanced the understanding of how regulated cargo binding can lead to regulated transport.

  • Organizational Affiliation

    Division of Rheumatology, Immunology, and Allergy, Brigham and Women's Hospital, and the Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Arf-GAP with coiled-coil, ANK repeat and PH domain-containing protein 1
A, B
368Homo sapiensMutation(s): 1 
Gene Names: ACAP1CENTB1KIAA0050
UniProt & NIH Common Fund Data Resources
Find proteins for Q15027 (Homo sapiens)
Explore Q15027 
Go to UniProtKB:  Q15027
PHAROS:  Q15027
GTEx:  ENSG00000072818 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ15027
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.218 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 107.561α = 90
b = 163.46β = 90
c = 41.184γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-07-18
    Type: Initial release
  • Version 1.1: 2013-01-16
    Changes: Database references
  • Version 1.2: 2024-03-20
    Changes: Data collection, Database references, Derived calculations