PDBsum entry 6h0r

RNA

PDB id: 6h0r

Contents

DNA/RNA

Metals

_MG

_BA ×12

Waters ×116

References listed in PDB file

Key reference

• Title: Staufen2-Mediated RNA recognition and localization requires combinatorial action of multiple domains.
• Authors: S.Heber, I.Gáspár, J.N.Tants, J.Günther, S.M.F.Moya, R.Janowski, A.Ephrussi, M.Sattler, D.Niessing.
• Ref.: Nat Commun, 2019, 10, 1659. [DOI no: 10.1038/s41467-019-09655-3]
• PubMed id: 30971701

Abstract

Throughout metazoans, Staufen (Stau) proteins are core factors of mRNA localization particles. They consist of three to four double-stranded RNA binding domains (dsRBDs) and a C-terminal dsRBD-like domain. Mouse Staufen2 (mStau2)-like Drosophila Stau (dmStau) contains four dsRBDs. Existing data suggest that only dsRBDs 3-4 are necessary and sufficient for mRNA binding. Here, we show that dsRBDs 1 and 2 of mStau2 bind RNA with similar affinities and kinetics as dsRBDs 3 and 4. While RNA binding by these tandem domains is transient, all four dsRBDs recognize their target RNAs with high stability. Rescue experiments in Drosophila oocytes demonstrate that mStau2 partially rescues dmStau-dependent mRNA localization. In contrast, a rescue with mStau2 bearing RNA-binding mutations in dsRBD1-2 fails, confirming the physiological relevance of our findings. In summary, our data show that the dsRBDs 1-2 play essential roles in the mRNA recognition and function of Stau-family proteins of different species.