Download MendeleyProtein-RNA and protein-protein recognition by dual KH1/2 domains of the neuronal splicing factor Nova-1.
Teplova, M., Malinina, L., Darnell, J.C., Song, J., Lu, M., Abagyan, R., Musunuru, K., Teplov, A., Burley, S.K., Darnell, R.B., Patel, D.J.(2011) Structure 19: 930-944
- PubMed: 21742260
- DOI: https://doi.org/10.1016/j.str.2011.05.002
- Primary Citation of Related Structures:
2ANN, 2ANR - PubMed Abstract:
Nova onconeural antigens are neuron-specific RNA-binding proteins implicated in paraneoplastic opsoclonus-myoclonus-ataxia (POMA) syndrome. Nova harbors three K-homology (KH) motifs implicated in alternate splicing regulation of genes involved in inhibitory synaptic transmission. We report the crystal structure of the first two KH domains (KH1/2) of Nova-1 bound to an in vitro selected RNA hairpin, containing a UCAG-UCAC high-affinity binding site. Sequence-specific intermolecular contacts in the complex involve KH1 and the second UCAC repeat, with the RNA scaffold buttressed by interactions between repeats. Whereas the canonical RNA-binding surface of KH2 in the above complex engages in protein-protein interactions in the crystalline state, the individual KH2 domain can sequence-specifically target the UCAC RNA element in solution. The observed antiparallel alignment of KH1 and KH2 domains in the crystal structure of the complex generates a scaffold that could facilitate target pre-mRNA looping on Nova binding, thereby potentially explaining Nova's functional role in splicing regulation.
Organizational Affiliation:
Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA.
