2LEH

Solution structure of the core SMN-Gemin2 complex


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 400 
  • Conformers Submitted: 32 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Solution structure of the core SMN-Gemin2 complex.

Sarachan, K.L.Valentine, K.G.Gupta, K.Moorman, V.R.Gledhill Jr, J.M.Bernens, M.Tommos, C.Wand, A.J.Van Duyne, G.D.

(2012) Biochem.J. 445: 361-370

  • DOI: 10.1042/BJ20120241

  • PubMed Abstract: 
  • In humans, assembly of spliceosomal snRNPs (small nuclear ribonucleoproteins) begins in the cytoplasm where the multi-protein SMN (survival of motor neuron) complex mediates the formation of a seven-membered ring of Sm proteins on to a conserved site ...

    In humans, assembly of spliceosomal snRNPs (small nuclear ribonucleoproteins) begins in the cytoplasm where the multi-protein SMN (survival of motor neuron) complex mediates the formation of a seven-membered ring of Sm proteins on to a conserved site of the snRNA (small nuclear RNA). The SMN complex contains the SMN protein Gemin2 and several additional Gemins that participate in snRNP biosynthesis. SMN was first identified as the product of a gene found to be deleted or mutated in patients with the neurodegenerative disease SMA (spinal muscular atrophy), the leading genetic cause of infant mortality. In the present study, we report the solution structure of Gemin2 bound to the Gemin2-binding domain of SMN determined by NMR spectroscopy. This complex reveals the structure of Gemin2, how Gemin2 binds to SMN and the roles of conserved SMN residues near the binding interface. Surprisingly, several conserved SMN residues, including the sites of two SMA patient mutations, are not required for binding to Gemin2. Instead, they form a conserved SMN/Gemin2 surface that may be functionally important for snRNP assembly. The SMN-Gemin2 structure explains how Gemin2 is stabilized by SMN and establishes a framework for structure-function studies to investigate snRNP biogenesis as well as biological processes involving Gemin2 that do not involve snRNP assembly.


    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
Survival of motor neuron protein-interacting protein 1
A
189Homo sapiensGene Names: GEMIN2 (SIP1)
Find proteins for O14893 (Homo sapiens)
Go to Gene View: GEMIN2
Go to UniProtKB:  O14893
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Survival motor neuron protein
B
26Homo sapiensGene Names: SMN1, SMN2 (SMN, SMNT, SMNC)
Find proteins for Q16637 (Homo sapiens)
Go to Gene View: SMN1 SMN2
Go to UniProtKB:  Q16637
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 400 
  • Conformers Submitted: 32 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-06-27
    Type: Initial release
  • Version 1.1: 2012-07-11
    Type: Database references