1K8F

CRYSTAL STRUCTURE OF THE HUMAN C-TERMINAL CAP1-ADENYLYL CYCLASE ASSOCIATED PROTEIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.232 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Crystal structure of the actin binding domain of the cyclase-associated protein.

Dodatko, T.Fedorov, A.A.Grynberg, M.Patskovsky, Y.Rozwarski, D.A.Jaroszewski, L.Aronoff-Spencer, E.Kondraskina, E.Irving, T.Godzik, A.Almo, S.C.

(2004) Biochemistry 43: 10628-10641

  • DOI: https://doi.org/10.1021/bi049071r
  • Primary Citation of Related Structures:  
    1K4Z, 1K8F

  • PubMed Abstract: 

    Cyclase-associated protein (CAP or Srv2p) is a modular actin monomer binding protein that directly regulates filament dynamics and has been implicated in a number of complex developmental and morphological processes, including mRNA localization and the establishment of cell polarity. The crystal structure of the C-terminal dimerization and actin monomer binding domain (C-CAP) reveals a highly unusual dimer, composed of monomers possessing six coils of right-handed beta-helix flanked by antiparallel beta-strands. Domain swapping, involving the last two strands of each monomer, results in the formation of an extended dimer with an extensive interface. This structural and biochemical characterization provides new insights into the organization and potential mechanistic properties of the multiprotein assemblies that integrate dynamic actin processes into the overall physiology of the cell. An unanticipated finding is that the unique tertiary structure of the C-CAP monomer provides a structural model for a wide range of molecules, including RP2 and cofactor C, proteins involved in X-linked retinitis pigmentosa and tubulin maturation, respectively, as well as several uncharacterized proteins that exhibit very diverse domain organizations. Thus, the unusual right-handed beta-helical fold present in C-CAP appears to support a wide range of biological functions.


  • Organizational Affiliation

    Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ADENYLYL CYCLASE-ASSOCIATED PROTEIN
A, B, C, D
157Homo sapiensMutation(s): 0 
Gene Names: CAP1
UniProt & NIH Common Fund Data Resources
Find proteins for Q01518 (Homo sapiens)
Explore Q01518 
Go to UniProtKB:  Q01518
PHAROS:  Q01518
GTEx:  ENSG00000131236 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ01518
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.268 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.232 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 82.64α = 90
b = 83.12β = 90
c = 99.96γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

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: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2012-01-25
    Changes: Database references
  • Version 1.4: 2021-02-03
    Changes: Structure summary
  • Version 1.5: 2023-08-16
    Changes: Data collection, Database references, Refinement description