5LE0

MICAL1 Cterminal domain


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.306 
  • R-Value Work: 0.271 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Oxidation of F-actin controls the terminal steps of cytokinesis.

Fremont, S.Hammich, H.Bai, J.Wioland, H.Klinkert, K.Rocancourt, M.Kikuti, C.Stroebel, D.Romet-Lemonne, G.Pylypenko, O.Houdusse, A.Echard, A.

(2017) Nat Commun 8: 14528-14528

  • DOI: 10.1038/ncomms14528

  • PubMed Abstract: 
  • Cytokinetic abscission, the terminal step of cell division, crucially depends on the local constriction of ESCRT-III helices after cytoskeleton disassembly. While the microtubules of the intercellular bridge are cut by the ESCRT-associated enzyme Spa ...

    Cytokinetic abscission, the terminal step of cell division, crucially depends on the local constriction of ESCRT-III helices after cytoskeleton disassembly. While the microtubules of the intercellular bridge are cut by the ESCRT-associated enzyme Spastin, the mechanism that clears F-actin at the abscission site is unknown. Here we show that oxidation-mediated depolymerization of actin by the redox enzyme MICAL1 is key for ESCRT-III recruitment and successful abscission. MICAL1 is recruited to the abscission site by the Rab35 GTPase through a direct interaction with a flat three-helix domain found in MICAL1 C terminus. Mechanistically, in vitro assays on single actin filaments demonstrate that MICAL1 is activated by Rab35. Moreover, in our experimental conditions, MICAL1 does not act as a severing enzyme, as initially thought, but instead induces F-actin depolymerization from both ends. Our work reveals an unexpected role for oxidoreduction in triggering local actin depolymerization to control a fundamental step of cell division.


    Organizational Affiliation

    Membrane Traffic and Cell Division Lab, Cell Biology and Infection Department Institut Pasteur, 25-28 rue du Dr Roux, 75724 Paris Cedex 15, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein-methionine sulfoxide oxidase MICAL1
B
150Homo sapiensMutation(s): 0 
Gene Names: MICAL1 (MICAL, NICAL)
EC: 1.14.13.225
Find proteins for Q8TDZ2 (Homo sapiens)
Go to Gene View: MICAL1
Go to UniProtKB:  Q8TDZ2
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.3 Å
  • R-Value Free: 0.306 
  • R-Value Work: 0.271 
  • Space Group: P 43 2 2
Unit Cell:
Length (Å)Angle (°)
a = 52.780α = 90.00
b = 52.780β = 90.00
c = 157.000γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
XDSdata reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-03-01
    Type: Initial release
  • Version 1.1: 2017-03-08
    Type: Database references