4GLI

Crystal Structure of Human SMN YG-Dimer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.903 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.203 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The survival motor neuron protein forms soluble glycine zipper oligomers.

Martin, R.Gupta, K.Ninan, N.S.Perry, K.Van Duyne, G.D.

(2012) Structure 20: 1929-1939

  • DOI: 10.1016/j.str.2012.08.024

  • PubMed Abstract: 
  • The survival motor neuron (SMN) protein forms the oligomeric core of a multiprotein complex that functions in spliceosomal snRNP biogenesis. Loss of function mutations in the SMN gene cause spinal muscular atrophy (SMA), a leading genetic cause of in ...

    The survival motor neuron (SMN) protein forms the oligomeric core of a multiprotein complex that functions in spliceosomal snRNP biogenesis. Loss of function mutations in the SMN gene cause spinal muscular atrophy (SMA), a leading genetic cause of infant mortality. Nearly half of the known SMA patient missense mutations map to the SMN YG-box, a highly conserved oligomerization domain of unknown structure that contains a (YxxG)₃ motif. Here, we report that the SMN YG-box forms helical oligomers similar to the glycine zippers found in transmembrane channel proteins. A network of tyrosine-glycine packing between helices drives formation of soluble YG-box oligomers, providing a structural basis for understanding SMN oligomerization and for relating defects in oligomerization to the mutations found in SMA patients. These results have important implications for advancing our understanding of SMN function and glycine zipper-mediated helix-helix interactions.


    Organizational Affiliation

    Graduate Group in Biochemistry and Molecular Biophysics, University of Pennsylvania, Philadelphia, PA 19104, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Maltose-binding periplasmic protein, Survival motor neuron protein chimera
A
401Escherichia coli (strain K12)Homo sapiens
This entity is chimeric
Mutation(s): 0 
Gene Names: malE, SMN1, SMN2 (SMN, SMNT, SMNC)
Find proteins for P0AEX9 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AEX9
Find proteins for Q16637 (Homo sapiens)
Go to Gene View: SMN1 SMN2
Go to UniProtKB:  Q16637
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.903 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.203 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 87.745α = 90.00
b = 65.914β = 110.48
c = 84.908γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
REFMACrefinement
AMoREphasing
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-17
    Type: Initial release
  • Version 1.1: 2012-11-28
    Type: Database references
  • Version 1.2: 2017-07-26
    Type: Refinement description, Source and taxonomy