Decoding the Bell-Shaped Calcium Spikes in Phosphorylation Cycles of Flagella.

Miljko Satarić, Tomas Nemeš, Jack Tuszynski

International journal of molecular sciences 2022 Mar 29

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We investigate the messenger role of calcium ions implicated in the regulation of wave-like bending dynamics of flagella. The emphasis is on microtubules of flagellar axoneme serving as nonlinear transmission lines for bell-shaped spikes of calcium ions. The calcium sensitive proteins, such as calmodulin, exhibit activation dependence on the spike train frequency and amplitude. Here, we analyze a Ca2+ decoding module IDA-I1 whose activity is controlled by Ca2+ activated kinase. We find that trains of Ca2+ spikes are advantageous compared to a constant rise in Ca2+ concentration as being more efficient and much less prone to noisy fluctuations.

Citation

Miljko Satarić, Tomas Nemeš, Jack Tuszynski. Decoding the Bell-Shaped Calcium Spikes in Phosphorylation Cycles of Flagella. International journal of molecular sciences. 2022 Mar 29;23(7)