Transcription coordinates histone amounts and genome content.
Nat. Commun. 12:4202 (2021)
Biochemical reactions typically depend on the concentrations of the molecules involved, and cell survival therefore critically depends on the concentration of proteins. To maintain constant protein concentrations during cell growth, global mRNA and protein synthesis rates are tightly linked to cell volume. While such regulation is appropriate for most proteins, certain cellular structures do not scale with cell volume. The most striking example of this is the genomic DNA, which doubles during the cell cycle and increases with ploidy, but is independent of cell volume. Here, we show that the amount of histone proteins is coupled to the DNA content, even though mRNA and protein synthesis globally increase with cell volume. As a consequence, and in contrast to the global trend, histone concentrations decrease with cell volume but increase with ploidy. We find that this distinct coordination of histone homeostasis and genome content is already achieved at the transcript level, and is an intrinsic property of histone promoters that does not require direct feedback mechanisms. Mathematical modeling and histone promoter truncations reveal a simple and generalizable mechanism to control the cell volume- and ploidy-dependence of a given gene through the balance of the initiation and elongation rates.
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Publication type
Article: Journal article
Document type
Scientific Article
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Keywords
Cell-cycle; Messenger-rnas; Gene-expression; Yeast; Protein; Replication; Chaperones; Promoter; Roles; H2a
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Language
english
Publication Year
2021
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2021
ISSN (print) / ISBN
2041-1723
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2041-1723
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Volume: 12,
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Article Number: 4202
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Nature Publishing Group
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London
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Peer reviewed
POF-Topic(s)
30203 - Molecular Targets and Therapies
Research field(s)
Helmholtz Diabetes Center
PSP Element(s)
G-554400-001
Grants
Deutsche Forschungsgemeinschaft (German Research Foundation)
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Erfassungsdatum
2021-07-30