Unknown

Dataset Information

0

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


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 ?-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.

SUBMITTER: Nguyen JB 

PROVIDER: S-EPMC3525766 | biostudies-literature | 2013 Jan

REPOSITORIES: biostudies-literature

altmetric image

Publications

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

Nguyen Jennifer B JB   Modis Yorgo Y  

Journal of structural biology 20121023 1


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  ...[more]

Similar Datasets

| S-EPMC3061879 | biostudies-literature
| S-EPMC3093129 | biostudies-literature
| S-EPMC4993509 | biostudies-literature
| S-EPMC10789489 | biostudies-literature
| S-EPMC5829827 | biostudies-literature
| S-EPMC2630241 | biostudies-literature
| S-EPMC5068512 | biostudies-literature
| S-EPMC2801276 | biostudies-literature
| S-EPMC4392414 | biostudies-literature
| S-EPMC2828450 | biostudies-literature