5B86

Crystal structure of M-Sec


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.02 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.232 

wwPDB Validation 3D Report Full Report


This is version 1.1 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
  • Structures With Same Primary Citation

  • 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

    CREST, JST, Saitama 332-0012, Japan.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Tumor necrosis factor alpha-induced protein 2A, B600Mus musculusMutation(s): 0 
Gene Names: Tnfaip2
Find proteins for Q61333 (Mus musculus)
Explore Q61333 
Go to UniProtKB:  Q61333
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A,BL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.02 Å
  • R-Value Free: 0.292 
  • R-Value Work: 0.229 
  • R-Value Observed: 0.232 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.41α = 90
b = 107.829β = 90
c = 229.58γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
autoSHARPphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
JSPSJapan22121003
JSTJapanCREST

Revision History 

  • Version 1.0: 2016-10-12
    Type: Initial release
  • Version 1.1: 2020-02-26
    Changes: Data collection, Derived calculations