5B86

Crystal structure of M-Sec


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.017 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Distinct Roles for the N- and C-terminal Regions of M-Sec in Plasma Membrane Deformation during Tunneling Nanotube Formation.

Kimura, S.Yamashita, M.Yamakami-Kimura, M.Sato, Y.Yamagata, A.Kobashigawa, Y.Inagaki, F.Amada, T.Hase, K.Iwanaga, T.Ohno, H.Fukai, S.

(2016) Sci Rep 6: 33548-33548

  • DOI: 10.1038/srep33548

  • PubMed Abstract: 
  • The tunneling nanotube (TNT) is a structure used for intercellular communication, and is a thin membrane protrusion mediating transport of various signaling molecules and cellular components. M-Sec has potent membrane deformation ability and induces ...

    The tunneling nanotube (TNT) is a structure used for intercellular communication, and is a thin membrane protrusion mediating transport of various signaling molecules and cellular components. M-Sec has potent membrane deformation ability and induces TNT formation in cooperation with the Ral/exocyst complex. Here, we show that the N-terminal polybasic region of M-Sec directly binds phosphatidylinositol (4,5)-bisphosphate for its localization to the plasma membrane during the initial stage of TNT formation. We further report a crystal structure of M-Sec, which consists of helix bundles arranged in a straight rod-like shape, similar to the membrane tethering complex subunits. A positively charged surface in the C-terminal domains is required for M-Sec interaction with active RalA to extend the plasma membrane protrusions. Our results suggest that the membrane-associated M-Sec recruits active RalA, which directs the exocyst complex to form TNTs.


    Organizational Affiliation

    Laboratory of Histology and Cytology, Graduate School of Medicine, Hokkaido University, North 15, West 7, Kita-ku, Sapporo 060-8638, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tumor necrosis factor alpha-induced protein 2
A, B
600Mus musculusMutation(s): 0 
Gene Names: Tnfaip2
Find proteins for Q61333 (Mus musculus)
Go to UniProtKB:  Q61333
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.017 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.229 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 91.410α = 90.00
b = 107.829β = 90.00
c = 229.580γ = 90.00
Software Package:
Software NamePurpose
autoSHARPphasing
HKL-2000data scaling
PHENIXrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
JSPSJapan22121003
JSTJapanCREST

Revision History 

  • Version 1.0: 2016-10-12
    Type: Initial release