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 unifying sequence


Unifying Sequences, Structures, and Descriptions for Any-to-Any Protein Generation with the Large Multimodal Model HelixProtX

arXiv.org Artificial Intelligence

Proteins are fundamental components of biological systems and can be represented through various modalities, including sequences, structures, and textual descriptions. Despite the advances in deep learning and scientific large language models (LLMs) for protein research, current methodologies predominantly focus on limited specialized tasks -- often predicting one protein modality from another. These approaches restrict the understanding and generation of multimodal protein data. In contrast, large multimodal models have demonstrated potential capabilities in generating any-to-any content like text, images, and videos, thus enriching user interactions across various domains. Integrating these multimodal model technologies into protein research offers significant promise by potentially transforming how proteins are studied. To this end, we introduce HelixProtX, a system built upon the large multimodal model, aiming to offer a comprehensive solution to protein research by supporting any-to-any protein modality generation. Unlike existing methods, it allows for the transformation of any input protein modality into any desired protein modality. The experimental results affirm the advanced capabilities of HelixProtX, not only in generating functional descriptions from amino acid sequences but also in executing critical tasks such as designing protein sequences and structures from textual descriptions. Preliminary findings indicate that HelixProtX consistently achieves superior accuracy across a range of protein-related tasks, outperforming existing state-of-the-art models. By integrating multimodal large models into protein research, HelixProtX opens new avenues for understanding protein biology, thereby promising to accelerate scientific discovery.


Decision Transformer: Unifying sequence modelling and model-free, offline RL

#artificialintelligence

Can we apply massive advancements of Transformer approach with its simplicity and scalability to Reinforcement Learning (RL)? Yes, but for that - one needs to approach RL as a sequence modeling problem. The Decision Transformer does that by abstracting RL as a conditional sequence modeling and using language modeling technique of casual masking of self-attention from GPT/BERT, enabling autoregressive generation of trajectories from the previous tokens in a sequence. The classical RL approach of fitting the value functions, or computing policy gradients (needs live correction; online), has been ditched in favor of masked Transformer yielding optimal actions. The Decision Transformer can match or outperform strong algorithms designed explicitly for offline RL with minimal modifications from standard language modeling architectures.