Download MendeleyA novel open-barrel structure of octameric translin reveals a potential RNA entryway.
Eliahoo, E., Marx, A., Manor, H., Alian, A.(2015) J Mol Biol 427: 756-762
- PubMed: 25433126
- DOI: https://doi.org/10.1016/j.jmb.2014.11.013
- Primary Citation of Related Structures:
4WYV - PubMed Abstract:
The single-stranded DNA (ssDNA)/RNA binding protein translin was suggested to be involved in chromosomal translocations, telomere metabolism, and mRNA transport and translation. Oligonucleotide binding surfaces map within a closed cavity of translin octameric barrels, raising the question as to how DNA/RNA gain access to this inner cavity, particularly given that, to date, none of the barrel structures reported hint to an entryway. Here, we argue against a mechanism by which translin octamers may "dissociate and reassemble" upon RNA binding and report a novel "open"-barrel structure of human translin revealing a feasible DNA/RNA entryway into the cavity. Additionally, we report that translin not only is confined to binding of ssDNA oligonucleotides, or single-stranded extensions of double-stranded DNA (dsDNA), but also can bind single-stranded sequences internally embedded in dsDNA molecules.
Organizational Affiliation:
Department of Biology, Technion-Israel Institute of Technology, Haifa 320003, Israel.
