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**FusOn-pLM: A Fusion Oncoprotein-Specific Language Model via Focused Probabilistic Masking**
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In this work, we introduce FusOn-pLM
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# How to Use FusOn-pLM
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**FusOn-pLM: A Fusion Oncoprotein-Specific Language Model via Focused Probabilistic Masking**
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In this work, we introduce **FusOn-pLM**, a novel pLM that fine-tunes state-of-the-art ESM-2 embeddings on fusion oncoprotein sequences, those that drive a large portion of pediatric cancers but are heavily disordered and undruggable, via masked language modeling (MLM). We specifically introduce a novel MLM strategy, employing a binding-site probability predictor to focus masking on key amino acid residues, thereby generating more optimal fusion oncoprotein-aware embeddings. Our model improves performance on both fusion oncoprotein-specific benchmarks and disorder prediction tasks in comparison to baseline ESM-2 representations, as well as manually-constructed biophysical embeddings, motivating downstream usage of FusOn-pLM embeddings for therapeutic design tasks targeting these fusions.
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# How to Use FusOn-pLM
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