LiteFold/MegaScale-Tsuboyama2023
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MegaScale Tsuboyama 2023 Stability数据集基于cDNA display proteolysis方法,用于大规模测量蛋白质折叠热力学稳定性。该方法在一周实验中可测量多达900,000个蛋白质结构域,总测量量达180万次,最终筛选出约776,000个高质量折叠稳定性数据。数据覆盖331个天然蛋白质结构域和148个从头设计蛋白质结构域的所有单氨基酸变体及部分双突变体,这些结构域长度在40-72个氨基酸之间。该数据集用于量化环境因素对氨基酸适应性的影响、蛋白质位点间的热力学耦合(包括意外相互作用),以及进化氨基酸使用与蛋白质折叠稳定性之间的全局差异。此外,它还用于识别设计蛋白质中的稳定性决定因素和评估设计方法。cDNA display proteolysis方法快速、准确且可扩展性强,有望揭示氨基酸序列编码折叠稳定性的定量规则。
Advances in DNA sequencing and machine learning are providing insights into protein sequences and structures on an enormous scale. However, the energetics driving folding are invisible in these structures and remain largely unknown. The hidden thermodynamics of folding can drive disease, shape protein evolution and guide protein engineering, and new approaches are needed to reveal these thermodynamics for every sequence and structure. Here we present cDNA display proteolysis, a method for measuring thermodynamic folding stability for up to 900,000 protein domains in a one-week experiment. From 1.8 million measurements in total, we curated a set of around 776,000 high-quality folding stabilities covering all single amino acid variants and selected double mutants of 331 natural and 148 de novo designed protein domains 40–72 amino acids in length. Using this extensive dataset, we quantified (1) environmental factors influencing amino acid fitness, (2) thermodynamic couplings (including unexpected interactions) between protein sites, and (3) the global divergence between evolutionary amino acid usage and protein folding stability. We also examined how our approach could identify stability determinants in designed proteins and evaluate design methods. The cDNA display proteolysis method is fast, accurate and uniquely scalable, and promises to reveal the quantitative rules for how amino acid sequences encode folding stability.




