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Sparse dictionary learning recovers pleiotropy from human cell fitness screens.

Authors :
Pan J
Kwon JJ
Talamas JA
Borah AA
Vazquez F
Boehm JS
Tsherniak A
Zitnik M
McFarland JM
Hahn WC
Source :
Cell systems [Cell Syst] 2022 Apr 20; Vol. 13 (4), pp. 286-303.e10. Date of Electronic Publication: 2022 Jan 31.
Publication Year :
2022

Abstract

In high-throughput functional genomic screens, each gene product is commonly assumed to exhibit a singular biological function within a defined protein complex or pathway. In practice, a single gene perturbation may induce multiple cascading functional outcomes, a genetic principle known as pleiotropy. Here, we model pleiotropy in fitness screen collections by representing each gene perturbation as the sum of multiple perturbations of biological functions, each harboring independent fitness effects inferred empirically from the data. Our approach (Webster) recovered pleiotropic functions for DNA damage proteins from genotoxic fitness screens, untangled distinct signaling pathways upstream of shared effector proteins from cancer cell fitness screens, and predicted the stoichiometry of an unknown protein complex subunit from fitness data alone. Modeling compound sensitivity profiles in terms of genetic functions recovered compound mechanisms of action. Our approach establishes a sparse approximation mechanism for unraveling complex genetic architectures underlying high-dimensional gene perturbation readouts.<br />Competing Interests: Declaration of interests F.V. receives research support from Novo Ventures. A.T. is a consultant for Cedilla Therapeutics, Foghorn Therapeutics, and The Center for Protein Degradation (Deerfield) and is an SAB member and holds equity in Turbine Simulated Cell Technologies. W.C.H. is a consultant for Thermo Fisher, Solasta Ventures, MPM Capital, KSQ Therapeutics, iTeos, Tyra Biosciences, Jubilant Therapeutics, RAPPTA Therapeutics, Frontier Medicine, Calyx, and Function Oncology.<br /> (Copyright © 2021 The Author(s). Published by Elsevier Inc. All rights reserved.)

Subjects

Subjects :
Humans
Genomics methods

Details

Language :
English
ISSN :
2405-4720
Volume :
13
Issue :
4
Database :
MEDLINE
Journal :
Cell systems
Publication Type :
Academic Journal
Accession number :
35085500
Full Text :
https://doi.org/10.1016/j.cels.2021.12.005