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Heterogeneity of the GFP fitness landscape and data-driven protein design
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Heterogeneity of the GFP fitness landscape and data-driven protein design
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Journal Article
Heterogeneity of the GFP fitness landscape and data-driven protein design
2022
Overview
Studies of protein fitness landscapes reveal biophysical constraints guiding protein evolution and empower prediction of functional proteins. However, generalisation of these findings is limited due to scarceness of systematic data on fitness landscapes of proteins with a defined evolutionary relationship. We characterized the fitness peaks of four orthologous fluorescent proteins with a broad range of sequence divergence. While two of the four studied fitness peaks were sharp, the other two were considerably flatter, being almost entirely free of epistatic interactions. Mutationally robust proteins, characterized by a flat fitness peak, were not optimal templates for machine-learning-driven protein design – instead, predictions were more accurate for fragile proteins with epistatic landscapes. Our work paves insights for practical application of fitness landscape heterogeneity in protein engineering.
Publisher
eLife Sciences Publications Ltd,eLife Sciences Publications, Ltd
Subject
