1RT8

CRYSTAL STRUCTURE OF THE ACTIN-CROSSLINKING CORE OF SCHIZOSACCHAROMYCES POMBE FIMBRIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.237 

Starting Model: experimental
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This is version 1.3 of the entry. See complete history


Literature

Structure of the actin crosslinking core of fimbrin.

Klein, M.G.Shi, W.Ramagopal, U.Tseng, Y.Wirtz, D.Kovar, D.R.Staiger, C.J.Almo, S.C.

(2004) Structure 12: 999-1013

  • DOI: https://doi.org/10.1016/j.str.2004.04.010
  • Primary Citation of Related Structures:  
    1PXY, 1RT8

  • PubMed Abstract: 

    Filamentous actin is organized into bundles and orthogonal networks by the fimbrin/alpha-actinin superfamily of F-actin crosslinking proteins. The crystal structure of the Arabidopsis thaliana and Schizosaccharomyces pombe fimbrin cores provides the first description of a functional F-actin crosslinking protein and highlights the compact and distinctly asymmetric organization of the fimbrin molecule, in which the two actin binding domains present distinct surfaces to solvent. The mapping of functionally important residues onto the structure affords new insights into the binding process and provides additional constraints which must be accommodated by models for F-actin binding and crosslinking. Most strikingly, this work provides unique insight into the mechanistic features of conditional-lethal mutants and their extragenic suppressors, which highlight conformational and dynamic properties required for fimbrin function. These results underscore the power of jointly considering structural and genetic suppressor data for obtaining unexpected and biologically relevant mechanistic information.


  • Organizational Affiliation

    Department of Biochemistry, Center for Synchrotron Biosciences, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
fimbrin513Schizosaccharomyces pombeMutation(s): 0 
UniProt
Find proteins for O59945 (Schizosaccharomyces pombe (strain 972 / ATCC 24843))
Explore O59945 
Go to UniProtKB:  O59945
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO59945
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.270 
  • R-Value Work: 0.237 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.243α = 90
b = 84.243β = 90
c = 150.819γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
SHELXSphasing
CNSrefinement
HKL-2000data reduction

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-06-22
    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: 2023-08-23
    Changes: Data collection, Database references, Derived calculations, Refinement description