4FP9

Human MTERF4-NSUN4 protein complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.229 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of the human MTERF4-NSUN4 protein complex that regulates mitochondrial ribosome biogenesis.

Spahr, H.Habermann, B.Gustafsson, C.M.Larsson, N.G.Hallberg, B.M.

(2012) Proc.Natl.Acad.Sci.USA 109: 15253-15258

  • DOI: 10.1073/pnas.1210688109

  • PubMed Abstract: 
  • Proteins crucial for the respiratory chain are translated by the mitochondrial ribosome. Mitochondrial ribosome biogenesis is therefore critical for oxidative phosphorylation capacity and disturbances are known to cause human disease. This complex pr ...

    Proteins crucial for the respiratory chain are translated by the mitochondrial ribosome. Mitochondrial ribosome biogenesis is therefore critical for oxidative phosphorylation capacity and disturbances are known to cause human disease. This complex process is evolutionary conserved and involves several RNA processing and modification steps required for correct ribosomal RNA maturation. We recently showed that a member of the mitochondrial transcription termination factor (MTERF) family of proteins, MTERF4, recruits NSUN4, a 5-methylcytosine RNA methyltransferase, to the large ribosomal subunit in a process crucial for mitochondrial ribosome biogenesis. Here, we describe the 3D crystal structure of the human MTERF4-NSUN4 complex determined to 2.9 Å resolution. MTERF4 is composed of structurally repeated MTERF-motifs that form a nucleic acid binding domain. NSUN4 lacks an N- or C-terminal extension that is commonly used for RNA recognition by related RNA methyltransferases. Instead, NSUN4 binds to the C-terminus of MTERF4. A positively charged surface forms an RNA binding path from the concave to the convex side of MTERF4 and further along NSUN4 all of the way into the active site. This finding suggests that both subunits of the protein complex likely contribute to RNA recognition. The interface between MTERF4 and NSUN4 contains evolutionarily conserved polar and hydrophobic amino acids, and mutations that change these residues completely disrupt complex formation. This study provides a molecular explanation for MTERF4-dependent recruitment of NSUN4 to ribosomal RNA and suggests a unique mechanism by which other members of the large MTERF-family of proteins can regulate ribosomal biogenesis.


    Organizational Affiliation

    Department of Mitochondrial Biology, Max Planck Institute for Biology of Ageing, Cologne, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
methyltransferase NSUN4
A, C, D, F
360Homo sapiensMutation(s): 0 
Gene Names: NSUN4
EC: 2.1.1.-
Find proteins for Q96CB9 (Homo sapiens)
Go to Gene View: NSUN4
Go to UniProtKB:  Q96CB9
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
mTERF domain-containing protein 2
B, E, G, H
335Homo sapiensMutation(s): 0 
Gene Names: MTERF4 (MTERFD2)
Find proteins for Q7Z6M4 (Homo sapiens)
Go to Gene View: MTERF4
Go to UniProtKB:  Q7Z6M4
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C, D, E, F
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
SAM
Query on SAM

Download SDF File 
Download CCD File 
A, C, D, F
S-ADENOSYLMETHIONINE
C15 H22 N6 O5 S
MEFKEPWMEQBLKI-FCKMPRQPSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.229 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 78.760α = 90.00
b = 82.270β = 90.00
c = 507.570γ = 90.00
Software Package:
Software NamePurpose
SHARPphasing
XSCALEdata scaling
BUSTERrefinement
BUSTER-TNTrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-09-12
    Type: Initial release
  • Version 1.1: 2012-09-26
    Type: Database references