Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

 3D View: Structure | Electron Density

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 2 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 49.60 kDa 
• Atom Count: 2656 
• Residue Count: 312 
• Unique protein chains: 1

4H22

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

• DOI: 10.2210/pdb4H22/pdb

• Classification: TRANSCRIPTION
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2012-09-11 Released: 2012-11-07 
• Deposition Author(s): Nguyen, J.B., Modis, Y.

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Experimental Data Snapshot

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

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

• PubMed: 23099021 
• DOI: 10.1016/j.jsb.2012.10.006
• Primary Citation of Related Structures:  
  4H22


• 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-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.

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Leucine-rich repeat flightless-interacting protein 1	A, B, C, D	103	Homo sapiens	Mutation(s): 0  Gene Names: LRRFIP1, GCF2, TRIP
Find proteins for Q32MZ4 (Homo sapiens) Explore Q32MZ4  Go to UniProtKB:  Q32MZ4
NIH Common Fund Data Resources
PHAROS:  Q32MZ4 GTEx:  ENSG00000124831

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.89 Å
• R-Value Free: 0.248 
• R-Value Work: 0.235 
• R-Value Observed: 0.235 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 152.363	α = 90
b = 71.447	β = 110.1
c = 68.035	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
PHASER	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-09-11 
• Released Date: 2012-11-07 
Deposition Author(s): Nguyen, J.B., Modis, Y.

Revision History 

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