7DSB

Crystal structure of actin capping protein in complex with V-1 and twinfilin C-terminal tail


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.44 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.210 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural Insights into the Regulation of Actin Capping Protein by Twinfilin C-terminal Tail.

Takeda, S.Koike, R.Fujiwara, I.Narita, A.Miyata, M.Ota, M.Maeda, Y.

(2021) J Mol Biol 433: 166891-166891

  • DOI: https://doi.org/10.1016/j.jmb.2021.166891
  • Primary Citation of Related Structures:  
    7DS2, 7DS3, 7DS4, 7DS6, 7DS8, 7DSA, 7DSB

  • PubMed Abstract: 

    Twinfilin is a conserved actin regulator that interacts with actin capping protein (CP) via C terminus residues (TWtail) that exhibits sequence similarity with the CP interaction (CPI) motif of CARMIL. Here we report the crystal structure of TWtail in complex with CP. Our structure showed that although TWtail and CARMIL CPI bind CP to an overlapping surface via their middle regions, they exhibit different CP-binding modes at both termini. Consequently, TWtail and CARMIL CPI restrict the CP in distinct conformations of open and closed forms, respectively. Interestingly, V-1, which targets CP away from the TWtail binding site, also favors the open-form CP. Consistently, TWtail forms a stable ternary complex with CP and V-1, a striking contrast to CARMIL CPI, which rapidly dissociates V-1 from CP. Our results demonstrate that TWtail is a unique CP-binding motif that regulates CP in a manner distinct from CARMIL CPI.


  • Organizational Affiliation

    Graduate School of Science, Nagoya University, Nagoya, Aichi 464-8602, Japan. Electronic address: takedashuichi@okayama-u.ac.jp.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
F-actin-capping protein subunit alpha-1286Gallus gallusMutation(s): 0 
Gene Names: CAPZA1
UniProt
Find proteins for P13127 (Gallus gallus)
Explore P13127 
Go to UniProtKB:  P13127
Entity Groups  
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UniProt GroupP13127
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
F-actin-capping protein subunit beta isoforms 1244Gallus gallusMutation(s): 0 
Gene Names: CAPZB
UniProt
Find proteins for P14315 (Gallus gallus)
Explore P14315 
Go to UniProtKB:  P14315
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UniProt GroupP14315
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Myotrophin123Homo sapiensMutation(s): 0 
Gene Names: MTPN
UniProt & NIH Common Fund Data Resources
Find proteins for P58546 (Homo sapiens)
Explore P58546 
Go to UniProtKB:  P58546
PHAROS:  P58546
GTEx:  ENSG00000105887 
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UniProt GroupP58546
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Twinfilin-130Mus musculusMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q91YR1 (Mus musculus)
Explore Q91YR1 
Go to UniProtKB:  Q91YR1
IMPC:  MGI:1100520
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UniProt GroupQ91YR1
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.44 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.207 
  • R-Value Observed: 0.210 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.28α = 90
b = 87.48β = 90
c = 120.92γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XSCALEdata scaling
MOLREPphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

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Entry History & Funding Information

Deposition Data

  • Released Date: 2021-03-03 
  • Deposition Author(s): Takeda, S.

Funding OrganizationLocationGrant Number
Japan Society for the Promotion of Science (JSPS)Japan16K17708
Japan Society for the Promotion of Science (JSPS)Japan17K07373
Japan Society for the Promotion of Science (JSPS)Japan20K06522

Revision History  (Full details and data files)

  • Version 1.0: 2021-03-03
    Type: Initial release
  • Version 1.1: 2021-03-17
    Changes: Database references
  • Version 1.2: 2021-04-07
    Changes: Database references
  • Version 1.3: 2023-11-29
    Changes: Data collection, Database references, Refinement description