4NXT

Crystal structure of the cytosolic domain of human MiD51


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.12 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.223 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and functional analysis of MiD51, a dynamin receptor required for mitochondrial fission.

Richter, V.Palmer, C.S.Osellame, L.D.Singh, A.P.Elgass, K.Stroud, D.A.Sesaki, H.Kvansakul, M.Ryan, M.T.

(2014) J.Cell Biol. 204: 477-486

  • DOI: 10.1083/jcb.201311014
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Mitochondrial fission is important for organelle transport, inheritance, and turnover, and alterations in fission are seen in neurological disease. In mammals, mitochondrial fission is executed by dynamin-related protein 1 (Drp1), a cytosolic guanosi ...

    Mitochondrial fission is important for organelle transport, inheritance, and turnover, and alterations in fission are seen in neurological disease. In mammals, mitochondrial fission is executed by dynamin-related protein 1 (Drp1), a cytosolic guanosine triphosphatase that polymerizes and constricts the organelle. Recruitment of Drp1 to mitochondria involves receptors including Mff, MiD49, and MiD51. MiD49/51 form foci at mitochondrial constriction sites and coassemble with Drp1 to drive fission. Here, we solved the crystal structure of the cytosolic domain of human MiD51, which adopts a nucleotidyltransferase fold. Although MiD51 lacks catalytic residues for transferase activity, it specifically binds guanosine diphosphate and adenosine diphosphate. MiD51 mutants unable to bind nucleotides were still able to recruit Drp1. Disruption of an additional region in MiD51 that is not part of the nucleotidyltransferase fold blocked Drp1 recruitment and assembly of MiD51 into foci. MiD51 foci are also dependent on the presence of Drp1, and after scission they are distributed to daughter organelles, supporting the involvement of MiD51 in the fission apparatus.


    Organizational Affiliation

    Department of Biochemistry and 2 Australian Research Council Centre of Excellence in Coherent X-Ray Science, La Trobe Institute for Molecular Science, La Trobe University, Melbourne 3086, Australia.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mitochondrial dynamic protein MID51
A, B, C, D
347Homo sapiensMutation(s): 0 
Gene Names: MIEF1 (MID51, SMCR7L)
Find proteins for Q9NQG6 (Homo sapiens)
Go to Gene View: MIEF1
Go to UniProtKB:  Q9NQG6
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B, C, D
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.12 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.223 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 72.720α = 66.26
b = 78.735β = 84.93
c = 79.362γ = 64.07
Software Package:
Software NamePurpose
XDSdata reduction
ADSCdata collection
SCALAdata scaling
PHENIXrefinement
PHENIXphasing
PHENIXmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-12-25
    Type: Initial release
  • Version 1.1: 2014-03-19
    Type: Database references