5BZ6

Crystal structure of the N-terminal domain single mutant (S92A) of the human mitochondrial calcium uniporter fused with T4 lysozyme


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.164 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure and function of the N-terminal domain of the human mitochondrial calcium uniporter.

Lee, Y.Min, C.K.Kim, T.G.Song, H.K.Lim, Y.Kim, D.Shin, K.Kang, M.Kang, J.Y.Youn, H.S.Lee, J.G.An, J.Y.Park, K.R.Lim, J.J.Kim, J.H.Kim, J.H.Park, Z.Y.Kim, Y.S.Wang, J.Kim, D.H.Eom, S.H.

(2015) Embo Rep. 16: 1318-1333

  • DOI: 10.15252/embr.201540436
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The mitochondrial calcium uniporter (MCU) is responsible for mitochondrial calcium uptake and homeostasis. It is also a target for the regulation of cellular anti-/pro-apoptosis and necrosis by several oncogenes and tumour suppressors. Herein, we rep ...

    The mitochondrial calcium uniporter (MCU) is responsible for mitochondrial calcium uptake and homeostasis. It is also a target for the regulation of cellular anti-/pro-apoptosis and necrosis by several oncogenes and tumour suppressors. Herein, we report the crystal structure of the MCU N-terminal domain (NTD) at a resolution of 1.50 Å in a novel fold and the S92A MCU mutant at 2.75 Å resolution; the residue S92 is a predicted CaMKII phosphorylation site. The assembly of the mitochondrial calcium uniporter complex (uniplex) and the interaction with the MCU regulators such as the mitochondrial calcium uptake-1 and mitochondrial calcium uptake-2 proteins (MICU1 and MICU2) are not affected by the deletion of MCU NTD. However, the expression of the S92A mutant or a NTD deletion mutant failed to restore mitochondrial Ca(2+) uptake in a stable MCU knockdown HeLa cell line and exerted dominant-negative effects in the wild-type MCU-expressing cell line. These results suggest that the NTD of MCU is essential for the modulation of MCU function, although it does not affect the uniplex formation.


    Organizational Affiliation

    School of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea Steitz Center for Structural Biology, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea.,Steitz Center for Structural Biology, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea Department of Molecular Biochemistry and Biophysics, Yale University, New Haven, CT, USA.,School of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea dhkim@gist.ac.kr eom@gist.ac.kr.,School of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea Steitz Center for Structural Biology, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea Department of Chemistry, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea dhkim@gist.ac.kr eom@gist.ac.kr.,School of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea.,School of Life Sciences, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea.,Graduate School of New Drug Discovery & Development, Chungnam National University, Daejon, Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lysozyme,Calcium uniporter protein, mitochondrial
A
262Enterobacteria phage T4Homo sapiens
This entity is chimeric
Mutation(s): 4 
Gene Names: e, MCU (C10orf42, CCDC109A)
EC: 3.2.1.17
Find proteins for D9IEF7 (Enterobacteria phage T4)
Go to UniProtKB:  D9IEF7
Find proteins for Q8NE86 (Homo sapiens)
Go to Gene View: MCU
Go to UniProtKB:  Q8NE86
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.164 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 97.803α = 90.00
b = 97.803β = 90.00
c = 61.537γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
REFMACrefinement
HKL-2000data processing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-09-16
    Type: Initial release
  • Version 1.1: 2015-09-23
    Type: Other
  • Version 1.2: 2015-10-14
    Type: Database references