Figure 7: Superposition of the closest model to experiment (blue) onto a structure of target R1156 (green), a homolog of the SARS-CoV-2 SL5 domain. This target showed substantial experimental flexibility, and the superposition is to the second highest resolution cryo-EM map. The GDT_TS is 51%.
The most successful methods used classical RNA modeling methods, and although deep learning methods did take part, these were not yet competitive with the more established approaches. No good models were submitted for the two protein-RNA complexes, and it appears these were beyond the scope of then available methods. However, newer methods have appeared since then that may be more capable, for instance (25).