Cited by 590Bacterial Genetics and BiotechnologyGene Regulatory Network AnalysisGenomics and Chromatin Dynamics

Quantitative model for gene regulation by lambda phage repressor.

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Ackers, G K, Johnson, A D, Shea, M A·1982·Proceedings of the National Academy of Sciences

Abstract

A statistical thermodynamic model has been developed to account for the cooperative interactions of the bacteriophage lambda repressor with the lambda right operator. The model incorporates a general theory for quantitatively interpreting cooperative site-specific equilibrium binding data. Values for all interaction parameters of the model have been evaluated at 37 degrees C, 0.2 M KCl, from results of DNase protection experiments in vitro [A. D. Johnson, B. J. Meyer, & M. Ptashne, Proc. Natl. Acad. Sci. USA (1979) 76, 5061-5065]. With these values, the model predicts repression curves at the divergent promoters PR and PRM that control transcription of genes coding for the regulatory proteins cro and repressor, respectively. At physiological repressor concentrations, repression at PR is predicted to be nearly complete whereas PRM is predicted to remain highly active. The results demonstrate the importance of cooperative interactions between repressor dimers bound to the adjacent operator sites OR1 and OR2 in maintaining a stable lysogenic state and in allowing efficient switchover to the lytic state during induction.

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Crossref · 10.1073/pnas.79.4.1129

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  • BAF inhibition did not affect the binding of rTetR alone, suggesting that BAF is specifically recruited by VP48.

    “BAF inhibition did not affect the binding of rTetR alone (Fig. S3K), suggesting that BAF is specifically recruited by VP4821”

    From Single-molecule states link transcription factor binding to gene expression (2024) · cites this paper as [21]

    The indexed Abstract (page not provided) discusses a model of lambda phage repressor binding, not BAF inhibition or rTetR. Searches for rTetR binding under BAF inhibition and VP48-mediated BAF recruitment found no passage addressing either point in our copy. (LLM, conf=0.75)

    Experimental — accuracy not yet measured
  • VP48 is known to directly interact with chromatin-remodeling cofactors.

    “Because VP48 is known to directly interact with chromatin-remodeling cofactors21–23”

    From Single-molecule states link transcription factor binding to gene expression (2024) · cites this paper as [21]

    The supplied copy describes a model of lambda phage repressor binding at the right operator (Abstract, page not specified). Searches for VP48 and chromatin-remodeling cofactors found no passage addressing whether they directly interact. (LLM, conf=0.75)

    Experimental — accuracy not yet measured

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Authors
Ackers, G. K., Johnson, A. D., & Shea, M. A.
Affiliations
Harvard University (US)
Venue
Proceedings of the National Academy of Sciences
Published
1982-02
Volume
79
Issue
4
Pages
1129-1133
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2087234479
Cited by
590
References
25
Citations by year
2026: 9 · 2025: 13 · 2024: 17 · 2023: 9 · 2022: 14 · 2021: 19 · 2020: 22 · 2019: 22 · 2018: 22 · 2017: 15 · 2016: 26 · 2015: 17 · 2014: 22 · 2013: 32 · 2012: 26
FWCI
2.05
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Science Foundation
  • National Institutes of Health
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gene Regulatory Network Analysis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
cooperative DNA binding, statistical thermodynamic model, site-specific DNA binding, divergent promoters, lysogeny, gene expression regulation
MeSH terms
DNA-Binding Proteins, Gene Expression Regulation, Genes, Viral, Lysogeny, Mathematics, Models, Genetic, Operon, Bacteriophage lambda, Repressor Proteins, Transcription Factors, Viral Proteins, Virus Activation, Viral Regulatory and Accessory Proteins

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