3S6N

Crystal Structure of the Gemin2-binding domain of SMN, Gemin2 in Complex with SmD1/D2/F/E/G from Human


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.332 
  • R-Value Work: 0.253 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure of a Key Intermediate of the SMN Complex Reveals Gemin2's Crucial Function in snRNP Assembly.

Zhang, R.So, B.R.Li, P.Yong, J.Glisovic, T.Wan, L.Dreyfuss, G.

(2011) Cell 146: 384-395

  • DOI: 10.1016/j.cell.2011.06.043

  • PubMed Abstract: 
  • The SMN complex mediates the assembly of heptameric Sm protein rings on small nuclear RNAs (snRNAs), which are essential for snRNP function. Specific Sm core assembly depends on Sm proteins and snRNA recognition by SMN/Gemin2- and Gemin5-containing s ...

    The SMN complex mediates the assembly of heptameric Sm protein rings on small nuclear RNAs (snRNAs), which are essential for snRNP function. Specific Sm core assembly depends on Sm proteins and snRNA recognition by SMN/Gemin2- and Gemin5-containing subunits, respectively. The mechanism by which the Sm proteins are gathered while preventing illicit Sm assembly on non-snRNAs is unknown. Here, we describe the 2.5 Å crystal structure of Gemin2 bound to SmD1/D2/F/E/G pentamer and SMN's Gemin2-binding domain, a key assembly intermediate. Remarkably, through its extended conformation, Gemin2 wraps around the crescent-shaped pentamer, interacting with all five Sm proteins, and gripping its bottom and top sides and outer perimeter. Gemin2 reaches into the RNA-binding pocket, preventing RNA binding. Interestingly, SMN-Gemin2 interaction is abrogated by a spinal muscular atrophy (SMA)-causing mutation in an SMN helix that mediates Gemin2 binding. These findings provide insight into SMN complex assembly and specificity, linking snRNP biogenesis and SMA pathogenesis.


    Organizational Affiliation

    Howard Hughes Medical Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104-6148, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Survival of motor neuron protein-interacting protein 1
2
280Homo sapiensGene Names: GEMIN2 (SIP1)
Find proteins for O14893 (Homo sapiens)
Go to Gene View: GEMIN2
Go to UniProtKB:  O14893
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Small nuclear ribonucleoprotein Sm D1
A
119Homo sapiensGene Names: SNRPD1
Find proteins for P62314 (Homo sapiens)
Go to Gene View: SNRPD1
Go to UniProtKB:  P62314
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Small nuclear ribonucleoprotein Sm D2
B
118Homo sapiensGene Names: SNRPD2 (SNRPD1)
Find proteins for P62316 (Homo sapiens)
Go to Gene View: SNRPD2
Go to UniProtKB:  P62316
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Small nuclear ribonucleoprotein E
E
92Homo sapiensGene Names: SNRPE
Find proteins for P62304 (Homo sapiens)
Go to Gene View: SNRPE
Go to UniProtKB:  P62304
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Small nuclear ribonucleoprotein F
F
86Homo sapiensGene Names: SNRPF (PBSCF)
Find proteins for P62306 (Homo sapiens)
Go to Gene View: SNRPF
Go to UniProtKB:  P62306
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
Small nuclear ribonucleoprotein G
G
76Homo sapiensGene Names: SNRPG (PBSCG)
Find proteins for P62308 (Homo sapiens)
Go to Gene View: SNRPG
Go to UniProtKB:  P62308
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
Survival motor neuron protein
M
37Homo 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: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.332 
  • R-Value Work: 0.253 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 82.830α = 90.00
b = 84.600β = 90.00
c = 104.660γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
PHASESphasing
REFMACrefinement
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-08-17
    Type: Initial release