Cited by 422Protein Structure and DynamicsEnzyme Catalysis and ImmobilizationMachine Learning in Bioinformatics

Low-N protein engineering with data-efficient deep learning

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Biswas, Surojit, Khimulya, Grigory, Alley, Ethan C., Esvelt, Kevin M., Church, George M.·2021·Nature Methods

Published version of a preprint

Abstract

Protein engineering has enormous academic and industrial potential. However, it is limited by the lack of experimental assays that are consistent with the design goal and sufficiently high throughput to find rare, enhanced variants. Here we introduce a machine learning-guided paradigm that can use as few as 24 functionally assayed mutant sequences to build an accurate virtual fitness landscape and screen ten million sequences via in silico directed evolution. As demonstrated in two dissimilar proteins, GFP from Aequorea victoria (avGFP) and E. coli strain TEM-1 β-lactamase, top candidates from a single round are diverse and as active as engineered mutants obtained from previous high-throughput efforts. By distilling information from natural protein sequence landscapes, our model learns a latent representation of 'unnaturalness', which helps to guide search away from nonfunctional sequence neighborhoods. Subsequent low-N supervision then identifies improvements to the activity of interest. In sum, our approach enables efficient use of resource-intensive high-fidelity assays without sacrificing throughput, and helps to accelerate engineered proteins into the fermenter, field and clinic.

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  • Fine-tuning with sequences from a specific family improves ProGen's ability to capture that family's local sequence distribution.

    “we can utilize the technique of fine-tuning pre-trained language models32–35 with family-specific sequences to further improve ProGen’s ability to capture the distribution of local sequence neighborhoods corresponding to the protein family.”

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Research works printed but not linked: 3

  1. [40]40. [Sinai, S., Kelsic, E., Church, G. M. & Nowak, M. A. Variational auto-encoding of protein sequences. arXiv [q-bio.QM] (2017).](http://paperpile.com/b/DQDb1d/YM3aq)
  2. [53]53. [Manheim, D. & Garrabrant, S. Categorizing Variants of Goodhart's Law. arXiv [cs.AI] (2018).](http://paperpile.com/b/DQDb1d/3ZXIl)
  3. [77]77. [Le, Q. & Mikolov, T. Distributed representations of sentences and documents. International conference on machine learning (2014).](http://paperpile.com/b/DQDb1d/wE4pA)

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Authors
Biswas, S., Khimulya, G., Alley, E. C., Esvelt, K. M., & Church, G. M.
Affiliations
  • Harvard University (US)
  • MIT Media Lab (US)
Corresponding author
Church, George M.
Venue
Nature Methods
Published
2021-04
Volume
18
Issue
4
Pages
389-396
ISSN
  • 1548-7091 (ISSN-L)
  • 1548-7105
OpenAlex
W3144239152
Cited by
422
References
90
Citations by year
2026: 68 · 2025: 76 · 2024: 74 · 2023: 77 · 2022: 64 · 2021: 46 · 2020: 15
FWCI
20.64
Type
journal article
Language
en
Open access
Locations
  • Nature Methods (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (acceptedVersion)
  • DSpace@MIT (Massachusetts Institute of Technology) (submittedVersion, cc-by-nc-sa)
Funders
  • National Science Foundation (DE-FG02-02ER63445, 1745303)
  • U.S. Department of Energy (DE‐FG02‐, DEFG0202ER63445, FG02-02ER63445)
  • Open Philanthropy Project
  • Office of Science (FG02-02ER63445, DEFG0202ER63445)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Enzyme Catalysis and Immobilization
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Machine Learning in Bioinformatics
Keywords
protein engineering, deep learning, green fluorescent protein, TEM-1 beta-lactamase, high-throughput screening
MeSH terms
Deep Learning, Algorithms, beta-Lactamases, Models, Molecular, Protein Engineering

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