5W0T

Crystal structure of monomeric Msp1 from S. cerevisiae


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.230 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Msp1 Is a Membrane Protein Dislocase for Tail-Anchored Proteins.

Wohlever, M.L.Mateja, A.McGilvray, P.T.Day, K.J.Keenan, R.J.

(2017) Mol. Cell 67: 194-202.e6

  • DOI: 10.1016/j.molcel.2017.06.019

  • PubMed Abstract: 
  • Mislocalized tail-anchored (TA) proteins of the outer mitochondrial membrane are cleared by a newly identified quality control pathway involving the conserved eukaryotic protein Msp1 (ATAD1 in humans). Msp1 is a transmembrane AAA-ATPase, but its role ...

    Mislocalized tail-anchored (TA) proteins of the outer mitochondrial membrane are cleared by a newly identified quality control pathway involving the conserved eukaryotic protein Msp1 (ATAD1 in humans). Msp1 is a transmembrane AAA-ATPase, but its role in TA protein clearance is not known. Here, using purified components reconstituted into proteoliposomes, we show that Msp1 is both necessary and sufficient to drive the ATP-dependent extraction of TA proteins from the membrane. A crystal structure of the Msp1 cytosolic region modeled into a ring hexamer suggests that active Msp1 contains a conserved membrane-facing surface adjacent to a central pore. Structure-guided mutagenesis of the pore residues shows that they are critical for TA protein extraction in vitro and for functional complementation of an msp1 deletion in yeast. Together, these data provide a molecular framework for Msp1-dependent extraction of mislocalized TA proteins from the outer mitochondrial membrane.


    Related Citations: 
    • The conserved AAA-ATPase Msp1 confers organelle specificity to tail-anchored proteins.
      Okreglak, V.,Walter, P.
      (2014) Proc. Natl. Acad. Sci. U.S.A. 111: 8019
    • Msp1/ATAD1 maintains mitochondrial function by facilitating the degradation of mislocalized tail-anchored proteins.
      Chen, Y.C.,Umanah, G.K.,Dephoure, N.,Andrabi, S.A.,Gygi, S.P.,Dawson, T.M.,Dawson, V.L.,Rutter, J.
      (2014) EMBO J. 33: 1548
    • The AAA+ ATPase Thorase regulates AMPA receptor-dependent synaptic plasticity and behavior.
      Zhang, J.,Wang, Y.,Chi, Z.,Keuss, M.J.,Pai, Y.M.,Kang, H.C.,Shin, J.H.,Bugayenko, A.,Wang, H.,Xiong, Y.,Pletnikov, M.V.,Mattson, M.P.,Dawson, T.M.,Dawson, V.L.
      (2011) Cell 145: 284


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, The University of Chicago, 929 East 57th Street, Chicago, IL 60637, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protein MSP1
A
304Saccharomyces cerevisiae (strain ATCC 204508 / S288c)Mutation(s): 0 
Gene Names: MSP1 (YTA4)
Find proteins for P28737 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  P28737
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.63 Å
  • R-Value Free: 0.260 
  • R-Value Work: 0.230 
  • Space Group: P 32 1 2
Unit Cell:
Length (Å)Angle (°)
a = 56.351α = 90.00
b = 56.351β = 90.00
c = 206.707γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
xia2data scaling
PDB_EXTRACTdata extraction
PHASERphasing
Cootmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical SciencesUnited StatesP41 GM103403
National Institutes of Health/National Center for Research ResourcesUnited StatesS10 RR029205
National Institutes of Health/National Institute of General Medical SciencesUnited States2R01 GM086487
National Institutes of Health/National Heart, Lung, and Blood InstituteUnited States2T32HL7381
National Institutes of Health/National Cancer InstituteUnited States5T32CA9594
National Institutes of Health/National Institute of General Medical SciencesUnited States1F32GM119194
National Institutes of Health/National Institute of General Medical SciencesUnited StatesT32GM007183

Revision History 

  • Version 1.0: 2017-08-02
    Type: Initial release
  • Version 1.1: 2017-11-22
    Type: Refinement description