4XTB

Crystal structure of the N-terminal domain of the human mitochondrial calcium uniporter


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.176 
  • R-Value Work: 0.140 

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.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calcium uniporter protein, mitochondrial
A
123Homo sapiensMutation(s): 0 
Gene Names: MCU (C10orf42, CCDC109A)
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
PG4
Query on PG4

Download SDF File 
Download CCD File 
A
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.176 
  • R-Value Work: 0.140 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 55.463α = 90.00
b = 55.463β = 90.00
c = 68.929γ = 120.00
Software Package:
Software NamePurpose
REFMACrefinement
Cootmodel building
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