3LK4

Crystal structure of CapZ bound to the uncapping motif from CD2AP

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.99 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.228 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Structural characterization of a capping protein interaction motif defines a family of actin filament regulators.

Hernandez-Valladares, M., Kim, T., Kannan, B., Tung, A., Aguda, A.H., Larsson, M., Cooper, J.A., Robinson, R.C.

(2010) Nat Struct Mol Biol 17: 497-503

  • DOI: 10.1038/nsmb.1792
  • Primary Citation of Related Structures:  
    3LK2, 3LK3, 3LK4

  • PubMed Abstract: 

    • Capping protein (CP) regulates actin dynamics by binding the barbed ends of actin filaments. Removal of CP may be one means to harness actin polymerization for processes such as cell movement and endocytosis. Here we structurally and biochemically investigated a CP interaction (CPI) motif present in the otherwise unrelated proteins CARMIL and CD2AP ...

    Capping protein (CP) regulates actin dynamics by binding the barbed ends of actin filaments. Removal of CP may be one means to harness actin polymerization for processes such as cell movement and endocytosis. Here we structurally and biochemically investigated a CP interaction (CPI) motif present in the otherwise unrelated proteins CARMIL and CD2AP. The CPI motif wraps around the stalk of the mushroom-shaped CP at a site distant from the actin-binding interface, which lies on the top of the mushroom cap. We propose that the CPI motif may act as an allosteric modulator, restricting CP to a low-affinity, filament-binding conformation. Structure-based sequence alignments extend the CPI motif-containing family to include CIN85, CKIP-1, CapZIP and a relatively uncharacterized protein, WASHCAP (FAM21). Peptides comprising these CPI motifs are able to inhibit CP and to uncap CP-bound actin filaments.

    Organizational Affiliation: 

    Institute of Molecular and Cell Biology, A*STAR, Proteos, Singapore.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
F-actin-capping protein subunit alpha-1286Gallus gallusMutation(s): 0 
Gene Names: CAPZA1
Find proteins for P13127 (Gallus gallus)
Explore P13127 
Go to UniProtKB:  P13127
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
F-actin-capping protein subunit beta isoforms 1 and 2277Gallus gallusMutation(s): 0 
Gene Names: CAPZA1, CAPZB
Find proteins for P14315 (Gallus gallus)
Explore P14315 
Go to UniProtKB:  P14315
Protein Feature View
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  • Reference Sequence
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
CD2-associated protein29Homo sapiensMutation(s): 0 
Gene Names: CD2AP
Find proteins for Q9Y5K6 (Homo sapiens)
Explore Q9Y5K6 
Go to UniProtKB:  Q9Y5K6
NIH Common Fund Data Resources
PHAROS:  Q9Y5K6
GTEx:  ENSG00000198087
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.99 Å
  • R-Value Free: 0.272 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.228 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 59.728α = 90
b = 142.341β = 89.99
c = 192.999γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
MOLREPphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-04-07
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2019-12-18
    Changes: Database references