4H22

Crystal structure of the dimeric coiled-coil domain of the cytosolic nucleic acid sensor LRRFIP1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.89 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.235 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structure of the dimeric coiled-coil domain of the cytosolic nucleic acid sensor LRRFIP1.

Nguyen, J.B.Modis, Y.

(2013) J.Struct.Biol. 181: 82-88

  • DOI: 10.1016/j.jsb.2012.10.006

  • PubMed Abstract: 
  • LRRFIP1 binds cytoplasmic double-stranded DNA and RNA and interacts with FLI, the mammalian homolog of Drosophila flightless I, through a highly conserved 87-amino acid domain. Upon binding nucleic acid ligands, LRRFIP1 recruits and activates β-caten ...

    LRRFIP1 binds cytoplasmic double-stranded DNA and RNA and interacts with FLI, the mammalian homolog of Drosophila flightless I, through a highly conserved 87-amino acid domain. Upon binding nucleic acid ligands, LRRFIP1 recruits and activates β-catenin, leading to the IRF3-dependent production of type I interferon. However, the molecular mechanism of LRRFIP1 signaling is not well understood. Here we show that the FLI-interacting domain of LRRFIP1 forms a classic parallel, homodimeric coiled coil with 10 heptad repeats and 22 helical turns. The coiled coil domain is also a dimer in solution. However, a longer LRRFIP1 construct spanning the coiled coil and DNA binding domains assembles into higher order oligomers in solution. The structure of LRRFIP1-CC constitutes a valuable tool for probing the mechanism of LRRFIP1 signaling and for structural studies of larger LRRFIP1 constructs.


    Organizational Affiliation

    Department of Molecular Biophysics & Biochemistry, Yale University, New Haven, CT 06520, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Leucine-rich repeat flightless-interacting protein 1
A, B, C, D
103Homo sapiensMutation(s): 0 
Gene Names: LRRFIP1 (GCF2, TRIP)
Find proteins for Q32MZ4 (Homo sapiens)
Go to Gene View: LRRFIP1
Go to UniProtKB:  Q32MZ4
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.89 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.235 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 152.363α = 90.00
b = 71.447β = 110.10
c = 68.035γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
PHASERphasing
HKL-2000data scaling
REFMACrefinement
HKL-2000data collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-11-07
    Type: Initial release
  • Version 1.1: 2013-01-02
    Type: Database references