Retentive Network promotes efficient RNA language modeling of long sequences

The latent features of RNA sequences are crucial for our understanding of their functions. Thus, Transformer-based nucleotide language models have received widespread attention; however, the O(n²) complexity of Transformer limits their ability to process long sequences. In this work, we propose RNAret, an RNA language model based on Retention Network, which achieves training parallelism, low computational overhead, and long-sequence processing through a retention mechanism, with O(n) complexity. We pretrain RNAret using a self-supervised masked language modeling approach on 29.8 million RNA sequences. Experiments demonstrate the merit of RNAret as an RNA language model, achieving superior performance on a range of tasks, including RNA-RNA interaction prediction, RNA secondary structure prediction, and mRNA/lncRNA classification. RNAret shows strong potential for extracting latent features from RNA sequences and advancing our understanding of RNA biology.