https://scholars.lib.ntu.edu.tw/handle/123456789/575796
標題: | Temperature effect on water dynamics in tetramer phosphofructokinase matrix and the super-arrhenius respiration rate | 作者: | Yang H.-C Ge Y.-C Su K.-H Chang C.-C Lin K.-C Aquilanti V Kasai T. KING-CHUEN LIN |
公開日期: | 2021 | 卷: | 11 | 期: | 1 | 來源出版物: | Scientific Reports | 摘要: | Advances in understanding the temperature effect on water dynamics in cellular respiration are important for the modeling of integrated energy processes and metabolic rates. For more than half a century, experimental studies have contributed to the understanding of the catalytic role of water in respiration combustion, yet the detailed water dynamics remains elusive. We combine a super-Arrhenius model that links the temperature-dependent exponential growth rate of a population of plant cells to respiration, and an experiment on isotope labeled 18O2 uptake to H218O transport role and to a rate-limiting step of cellular respiration. We use Phosphofructokinase (PFK-1) as a prototype because this enzyme is known to be a pacemaker (a rate-limiting enzyme) in the glycolysis process of respiration. The characterization shows that PFK-1 water matrix dynamics are crucial for examining how respiration (PFK-1 tetramer complex breathing) rates respond to temperature change through a water and nano-channel network created by the enzyme folding surfaces, at both short and long (evolutionary) timescales. We not only reveal the nano-channel water network of PFK-1 tetramer hydration topography but also clarify how temperature drives the underlying respiration rates by mapping the channels of water diffusion with distinct dynamics in space and time. The results show that the PFK-1 assembly tetramer possesses a sustainable capacity in the regulation of the water network toward metabolic rates. The implications and limitations of the reciprocal-activation–reciprocal-temperature relationship for interpreting PFK-1 tetramer mechanisms are briefly discussed. ? 2021, The Author(s). |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85099257733&doi=10.1038%2fs41598-020-79271-5&partnerID=40&md5=52b5efd5ab2be4fa6b55cb50e767098b https://scholars.lib.ntu.edu.tw/handle/123456789/575796 |
ISSN: | 20452322 | DOI: | 10.1038/s41598-020-79271-5 |
顯示於: | 化學系 |
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