3LK3

Crystal structure of CapZ bound to the CPI and CSI uncapping motifs from CARMIL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.68 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.155 

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:  

  • 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 in ...

    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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
F-actin-capping protein subunit alpha-1
A
286Gallus gallusMutation(s): 0 
Gene Names: CAPZA1
Find proteins for P13127 (Gallus gallus)
Go to Gene View: CAPZA1
Go to UniProtKB:  P13127
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
F-actin-capping protein subunit beta isoforms 1 and 2
B
277Gallus gallusMutation(s): 0 
Gene Names: CAPZB
Find proteins for P14315 (Gallus gallus)
Go to Gene View: CAPZB
Go to UniProtKB:  P14315
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Leucine-rich repeat-containing protein 16A
T
115Homo sapiensMutation(s): 0 
Gene Names: CARMIL1 (CARMIL, LRRC16, LRRC16A)
Find proteins for Q5VZK9 (Homo sapiens)
Go to Gene View: CARMIL1
Go to UniProtKB:  Q5VZK9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.68 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.155 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 47.124α = 90.00
b = 115.535β = 108.20
c = 61.675γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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