3OMG

Structure of human SND1 extended tudor domain in complex with the symmetrically dimethylated arginine PIWIL1 peptide R14me2s

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Structural basis for recognition of arginine methylated Piwi proteins by the extended Tudor domain.

Liu, K., Chen, C., Guo, Y., Lam, R., Bian, C., Xu, C., Zhao, D.Y., Jin, J., MacKenzie, F., Pawson, T., Min, J.

(2010) Proc.Natl.Acad.Sci.USA 107: 18398-18403

  • DOI: 10.1073/pnas.1013106107
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • Arginine methylation modulates diverse cellular processes and represents a molecular signature of germ-line-specific Piwi family proteins. A subset of Tudor domains recognize arginine methylation modifications, but the binding mechanism has been lack ...

    Arginine methylation modulates diverse cellular processes and represents a molecular signature of germ-line-specific Piwi family proteins. A subset of Tudor domains recognize arginine methylation modifications, but the binding mechanism has been lacking. Here we establish that, like other germ-line Tudor proteins, the ancestral staphylococcal nuclease domain-containing 1 (SND1) polypeptide is expressed and associates with PIWIL1/Miwi in germ cells. We find that human SND1 binds PIWIL1 in an arginine methylation-dependent manner with a preference for symmetrically dimethylated arginine. The entire Tudor domain and a bifurcated SN domain are required for this binding activity, whereas the canonical Tudor domain alone is insufficient for methylarginine ligand binding. Crystal structures show that the intact SND1 extended Tudor domain forms a wide and negatively charged binding groove, which can accommodate distinct symmetrically dimethylated arginine peptides from PIWIL1 in different orientations. This analysis explains how SND1 preferentially recognizes symmetrical dimethylarginine via an aromatic cage and conserved hydrogen bonds, and provides a general paradigm for the binding mechanisms of methylarginine-containing peptides by extended Tudor domains.

    Organizational Affiliation: 

    Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Science, Huazhong Normal University, Wuhan 430079, People's Republic of China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Staphylococcal nuclease domain-containing protein 1
A, B
261Homo sapiensMutation(s): 0 
Gene Names: SND1 (TDRD11)
EC: 3.1.31.1
Find proteins for Q7KZF4 (Homo sapiens)
Go to Gene View: SND1
Go to UniProtKB:  Q7KZF4
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
dimethylated arginine peptide R14me2s
C, D
8N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
2MR
Query on 2MR
C, D
L-PEPTIDE LINKINGC8 H18 N4 O2ARG
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.192 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 35.721α = 90.00
b = 75.804β = 90.36
c = 80.073γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
HKL-2000data reduction
SCALEPACKdata scaling
MOLREPphasing
HKL-2000data scaling
REFMACrefinement
PDB_EXTRACTdata extraction
JDirectordata collection

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-09-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-11-08
    Type: Refinement description