PreprintCited by 11Gene Regulatory Network AnalysisProtein Structure and DynamicsGenomics and Chromatin Dynamics

Gauge fixing for sequence-function relationships

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Posfai, Anna, Zhou, Juannan, McCandlish, David M., Kinney, Justin B.·2024·PLoS Computational Biology

Preprint — published as 10.1371/journal.pcbi.1012818

Abstract

Quantitative models of sequence-function relationships are ubiquitous in computational biology, e.g., for modeling the DNA binding of transcription factors or the fitness landscapes of proteins. Interpreting these models, however, is complicated by the fact that the values of model parameters can often be changed without affecting model predictions. Before the values of model parameters can be meaningfully interpreted, one must remove these degrees of freedom (called “gauge freedoms” in physics) by imposing additional constraints (a process called “fixing the gauge”). However, strategies for fixing the gauge of sequence-function relationships have received little attention. Here we derive an analytically tractable family of gauges for a large class of sequence-function relationships. These gauges are derived in the context of models with all-order interactions, but an important subset of these gauges can be applied to diverse types of models, including additive models, pairwise-interaction models, and models with higher-order interactions. Many commonly used gauges are special cases of gauges within this family. We demonstrate the utility of this family of gauges by showing how different choices of gauge can be used both to explore complex activity landscapes and to reveal simplified models that are approximately correct within localized regions of sequence space. The results provide practical gauge-fixing strategies and demonstrate the utility of gauge-fixing for model exploration and interpretation. Significance Statement: Computational biology relies heavily on mathematical models that predict biological activities from DNA, RNA, or protein sequences. Interpreting the parameters of these models, however, remains difficult. Here we address a core challenge for model interpretation-the presence of ‘gauge freedoms’, i.e., ways of changing model parameters without affecting model predictions. The results unify commonly used methods for eliminating gauge freedoms and show how these methods can be used to simplify complex models in localized regions of sequence space. This work thus overcomes a major obstacle in the interpretation of quantitative sequence-function relationships.

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Authors
Posfai, A., Zhou, J., McCandlish, D. M., & Kinney, J. B.
Affiliations
Cold Spring Harbor Laboratory (US)
Corresponding author
Kinney, Justin B.
Venue
PLoS Computational Biology
Publisher
openRxiv
Published
2024-05-13
Volume
21
Issue
3
Pages
e1012818-e1012818
ISSN
1553-734X (ISSN-L)
OpenAlex
W4408658210
Cited by
11
References
104
Citations by year
2026: 5 · 2025: 6
FWCI
3.29
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • PLoS Computational Biology (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (acceptedVersion)
  • Cold Spring Harbor Laboratory Institutional Repository (Cold Spring Harbor Laboratory) (submittedVersion)
  • PubMed Central (submittedVersion, cc-by)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Alfred P. Sloan Foundation
  • University of Florida
  • Cold Spring Harbor Laboratory
  • National Institutes of Health (1r35gm154908-01)
  • College of Liberal Arts and Sciences, University of Florida
  • National Human Genome Research Institute (R01HG011787)
  • National Institute of General Medical Sciences (GM154908, R35GM154908, R35GM133777, R35GM133613)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gene Regulatory Network Analysis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
gauge fixing, sequence-function relationships, degrees of freedom, pairwise interaction model, higher-order interactions, additive models, activity landscape, model interpretation, transcription factor-DNA binding, protein fitness landscapes

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