4DKK

The X-ray Crystal Structure of the Human STAU1 SSM-'RBD'5 Domain-Swapped Dimer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.701 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.163 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Staufen1 dimerizes through a conserved motif and a degenerate dsRNA-binding domain to promote mRNA decay.

Gleghorn, M.L.Gong, C.Kielkopf, C.L.Maquat, L.E.

(2013) Nat.Struct.Mol.Biol. 20: 515-524

  • DOI: 10.1038/nsmb.2528

  • PubMed Abstract: 
  • Staufen1 (STAU1)-mediated mRNA decay (SMD) degrades mammalian-cell mRNAs that bind the double-stranded RNA (dsRNA)-binding protein STAU1 in their 3' untranslated region. We report a new motif, which typifies STAU homologs from all vertebrate classes, ...

    Staufen1 (STAU1)-mediated mRNA decay (SMD) degrades mammalian-cell mRNAs that bind the double-stranded RNA (dsRNA)-binding protein STAU1 in their 3' untranslated region. We report a new motif, which typifies STAU homologs from all vertebrate classes, that is responsible for human STAU1 (hSTAU1) homodimerization. Our crystal structure and mutagenesis analyses reveal that this motif, which we named the Staufen-swapping motif (SSM), and the dsRNA-binding domain 5 ('RBD'5) mediate protein dimerization: the two SSM α-helices of one molecule interact primarily through a hydrophobic patch with the two 'RBD'5 α-helices of a second molecule. 'RBD'5 adopts the canonical α-β-β-β-α fold of a functional RBD, but it lacks residues and features required to bind duplex RNA. In cells, SSM-mediated hSTAU1 dimerization increases the efficiency of SMD by augmenting hSTAU1 binding to the ATP-dependent RNA helicase hUPF1. Dimerization regulates keratinocyte-mediated wound healing and many other cellular processes.


    Organizational Affiliation

    Department of Biochemistry and Biophysics, School of Medicine and Dentistry, University of Rochester, Rochester, New York, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Double-stranded RNA-binding protein Staufen homolog 1
A
115Homo sapiensMutation(s): 0 
Gene Names: STAU1 (STAU)
Find proteins for O95793 (Homo sapiens)
Go to Gene View: STAU1
Go to UniProtKB:  O95793
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
FLC
Query on FLC

Download SDF File 
Download CCD File 
A
CITRATE ANION
C6 H5 O7
KRKNYBCHXYNGOX-UHFFFAOYSA-K
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.701 Å
  • R-Value Free: 0.202 
  • R-Value Work: 0.163 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 45.741α = 90.00
b = 45.741β = 90.00
c = 86.086γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data collection
PHENIXmodel building
PHENIXrefinement
HKL-2000data scaling
HKL-2000data reduction
PHENIXphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2012-02-03 
  • Released Date: 2013-03-20 
  • Deposition Author(s): Gleghorn, M.L.

Revision History 

  • Version 1.0: 2013-03-20
    Type: Initial release
  • Version 1.1: 2013-05-22
    Type: Database references