Machine learning predictor PSPire screens for phase-separating proteins lacking intrinsically disordered regions

Shuang Hou, Jiaojiao Hu, Zhaowei Yu, Dan Li, Cong Liu () and Yong Zhang ()
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Shuang Hou: Tongji University
Jiaojiao Hu: Chinese Academy of Sciences
Zhaowei Yu: Tongji University
Dan Li: Shanghai Jiao Tong University
Cong Liu: Chinese Academy of Sciences
Yong Zhang: Tongji University

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract The burgeoning comprehension of protein phase separation (PS) has ushered in a wealth of bioinformatics tools for the prediction of phase-separating proteins (PSPs). These tools often skew towards PSPs with a high content of intrinsically disordered regions (IDRs), thus frequently undervaluing potential PSPs without IDRs. Nonetheless, PS is not only steered by IDRs but also by the structured modular domains and interactions that aren’t necessarily reflected in amino acid sequences. In this work, we introduce PSPire, a machine learning predictor that incorporates both residue-level and structure-level features for the precise prediction of PSPs. Compared to current PSP predictors, PSPire shows a notable improvement in identifying PSPs without IDRs, which underscores the crucial role of non-IDR, structure-based characteristics in multivalent interactions throughout the PS process. Additionally, our biological validation experiments substantiate the predictive capacity of PSPire, with 9 out of 11 chosen candidate PSPs confirmed to form condensates within cells.

Date: 2024
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DOI: 10.1038/s41467-024-46445-y

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