## Rodenfels2019 - Heat Oscillations Driven by the Embryonic Cell Cycle Reveal the Energetic Costs of Signaling

Model Identifier
BIOMD0000000952
Short description
All living systems function out of equilibrium and exchange energy in the form of heat with their environment. Thus, heat flow can inform on the energetic costs of cellular processes, which are largely unknown. Here, we have repurposed an isothermal calorimeter to measure heat flow between developing zebrafish embryos and the surrounding medium. Heat flow increased over time with cell number. Unexpectedly, a prominent oscillatory component of the heat flow, with periods matching the synchronous early reductive cleavage divisions, persisted even when DNA synthesis and mitosis were blocked by inhibitors. Instead, the heat flow oscillations were driven by the phosphorylation and dephosphorylation reactions catalyzed by the cell-cycle oscillator, the biochemical network controlling mitotic entry and exit. We propose that the high energetic cost of cell-cycle signaling reflects the significant thermodynamic burden of imposing accurate and robust timing on cell proliferation during development.
Format
SBML (L2V4)
Related Publication
• Heat Oscillations Driven by the Embryonic Cell Cycle Reveal the Energetic Costs of Signaling.
• Rodenfels J, Neugebauer KM, Howard J
• Developmental cell , 3/ 2019 , Volume 48 , Issue 5 , pages: 646-658.e6 , PubMed ID: 30713074
• Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06520, USA. Electronic address: jonathan.rodenfels@gmail.com.
• All living systems function out of equilibrium and exchange energy in the form of heat with their environment. Thus, heat flow can inform on the energetic costs of cellular processes, which are largely unknown. Here, we have repurposed an isothermal calorimeter to measure heat flow between developing zebrafish embryos and the surrounding medium. Heat flow increased over time with cell number. Unexpectedly, a prominent oscillatory component of the heat flow, with periods matching the synchronous early reductive cleavage divisions, persisted even when DNA synthesis and mitosis were blocked by inhibitors. Instead, the heat flow oscillations were driven by the phosphorylation and dephosphorylation reactions catalyzed by the cell-cycle oscillator, the biochemical network controlling mitotic entry and exit. We propose that the high energetic cost of cell-cycle signaling reflects the significant thermodynamic burden of imposing accurate and robust timing on cell proliferation during development.
Contributors

hasTaxon
Taxonomy Danio rerio
hasPart
Gene Ontology regulation of cell cycle
hasProperty
Mathematical Modelling Ontology Ordinary differential equation model
CHMO_0002076
isDerivedFrom
isDescribedBy
is

Curation status
Curated

Modelling approach(es)

Tags
Name Description Size Actions

### Model files

Rodenfels2019_V1.xml SBML L2V4 Rodenfels2019 - Heat Oscillations Driven by the Embryonic Cell Cycle Reveal the Energetic Costs of Signaling 102.24 KB Preview | Download

Rodenfels2019_V1.cps COPASI version 4.27 (Build 217) Rodenfels2019 - Heat Oscillations Driven by the Embryonic Cell Cycle Reveal the Energetic Costs of Signaling_Fig.6B 160.31 KB Preview | Download
Rodenfels2019_V1.sedml sed-ml L1V2 Rodenfels2019 - Heat Oscillations Driven by the Embryonic Cell Cycle Reveal the Energetic Costs of Signaling_Fig.6B 7.45 KB Preview | Download
• Model originally submitted by : Ahmad Zyoud
• Submitted: 17-Apr-2020 15:03:15
##### Revisions
• Version: 3
• Submitted on: 14-May-2020 19:44:07
• With comment: Automatically added model identifier BIOMD0000000952
• Version: 1
• Submitted on: 17-Apr-2020 15:03:15