Two Seven-Bladed Beta-Propeller Domains Revealed By The Structure Of A C. elegans Homologue Of Yeast Actin Interacting Protein 1 (AIP1).

Experimental Data Snapshot

  • Resolution: 1.70 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Identification of Functional Residues on Caenorhabditis elegans Actin-interacting Protein 1 (UNC-78) for Disassembly of Actin Depolymerizing Factor/Cofilin-bound Actin Filaments

Mohri, K.Vorobiev, S.M.Fedorov, A.A.Almo, S.C.Ono, S.

(2004) J Biol Chem 279: 31697-31707

  • DOI: https://doi.org/10.1074/jbc.M403351200
  • Primary Citation of Related Structures:  
    1NR0, 1PEV

  • PubMed Abstract: 

    Actin-interacting protein 1 (AIP1) is a WD40 repeat protein that enhances actin filament disassembly in the presence of actin-depolymerizing factor (ADF)/cofilin. AIP1 also caps the barbed end of ADF/cofilin-bound actin filament. However, the mechanism by which AIP1 interacts with ADF/cofilin and actin is not clearly understood. We determined the crystal structure of Caenorhabditis elegans AIP1 (UNC-78), which revealed 14 WD40 modules arranged in two seven-bladed beta-propeller domains. The structure allowed for the mapping of conserved surface residues, and mutagenesis studies identified five residues that affected the ADF/cofilin-dependent actin filament disassembly activity. Mutations of these residues, which reside in blades 3 and 4 in the N-terminal propeller domain, had significant effects on the disassembly activity but did not alter the barbed end capping activity. These data support a model in which this conserved surface of AIP1 plays a direct role in enhancing fragmentation/depolymerization of ADF/cofilin-bound actin filaments but not in barbed end capping.

  • Organizational Affiliation

    Department of Pathology, Emory University, Atlanta, Georgia 30322, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Actin interacting protein 1611Caenorhabditis elegansMutation(s): 0 
Gene Names: UNC-78 OR C04F6.4
Find proteins for Q11176 (Caenorhabditis elegans)
Explore Q11176 
Go to UniProtKB:  Q11176
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ11176
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on MN

Download Ideal Coordinates CCD File 
Experimental Data & Validation

Experimental Data

  • Resolution: 1.70 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.199 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.845α = 90
b = 65.174β = 98.28
c = 69.24γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
SCALEPACKdata scaling
SHELXEmodel building
ARP/wARPmodel building

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-07-01
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-02-03
    Changes: Derived calculations, Structure summary
  • Version 1.4: 2024-02-14
    Changes: Data collection, Database references