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arXiv 2602.12470cs.LGcs.AI
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用语言模型设计RNA

Designing RNAs with Language Models

School of EECS;Dept. of Biochemistry \& Biophysics , Oregon State University , USA;Center for RNA Biology;Computational Biology , University of Rochester Medical Center , USA

Milan Gautam, Ning Dai, Tianshuo Zhou, Bowen Xie, David Mathews, Liang Huang

AI总结:

本文提出用自回归语言模型进行RNA设计,通过监督学习和强化学习优化,实现高效生成目标结构的序列。

摘要:

RNA设计任务是寻找能够折叠成目标二级结构的序列,具有广泛的生物和生物医学影响,但因其序列空间呈指数级增长以及竞争折叠形式呈指数级增多而计算上极具挑战性。传统方法将其视为优化问题,依赖于实例级启发式方法或基于约束的搜索。我们重新将RNA设计视为条件序列生成,并引入一个可重用的神经近似器,具体实现为自回归语言模型(LM),可直接将目标结构映射到序列。我们首先在监督设置下训练模型,使用随机诱导的结构-序列对进行训练,然后利用强化学习(RL)优化端到端指标。我们还提出了一种方法,选择少量样本用于RL,从而显著提高RL的效率和质量。在四个数据集中,我们的方法在Boltzmann概率等关键指标上优于最先进的系统,同时速度比现有方法快1.7倍,确立了条件LM生成作为RNA设计的可扩展、任务无关的替代方案。我们的代码和数据可在https://github.com/KuNyaa/RNA-Design-LM获取。

英文摘要:

RNA design, the task of finding a sequence that folds into a target secondary structure, has broad biological and biomedical impact but remains computationally challenging due to the exponentially large sequence space and exponentially many competing folds. Traditional approaches treat it as an optimization problem, relying on per-instance heuristics or constraint-based search. We instead reframe RNA design as conditional sequence generation and introduce a reusable neural approximator, instantiated as an autoregressive language model (LM), that maps target structures directly to sequences. We first train our model in a supervised setting on random-induced structure-sequence pairs, and then use reinforcement learning (RL) to optimize end-to-end metrics. We also propose methods to select a small subset for RL that greatly improves RL efficiency and quality. Across four datasets, our approach outperforms state-of-the-art systems on key metrics such as Boltzmann probability while being 1.7x faster, establishing conditional LM generation as a scalable, task-agnostic alternative to per-instance optimization for RNA design. Our code and data are available at https://github.com/KuNyaa/RNA-Design-LM.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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