Structural characterisation of TNRC6A nuclear localisation signal in complex with importin-alpha.Chaston, J.J., Stewart, A.G., Christie, M.
(2017) PLoS One 12: e0183587-e0183587
- PubMed: 28837617
- DOI: https://doi.org/10.1371/journal.pone.0183587
- Primary Citation of Related Structures:
- PubMed Abstract:
The GW182/TNRC6 family of proteins are central scaffolds that link microRNA-associated Argonaute proteins to the cytoplasmic decay machinery for targeted mRNA degradation processes. Although nuclear roles for the GW182/TNRC6 proteins are unknown, recent reports have demonstrated nucleocytoplasmic shuttling activity that utilises the importin-α and importin-β transport receptors for nuclear translocation. Here we describe the structure of mouse importin-α in complex with the TNRC6A nuclear localisation signal peptide. We further show that the interactions observed between TNRC6A and importin-α are conserved between mouse and human complexes. Our results highlight the ability of monopartite cNLS sequences to maximise contacts at the importin-α major binding site, as well as regions outside the main binding cavities.
St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, New South Wales, Australia.