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. 2025 Feb 7;197(2):kiaf019.
doi: 10.1093/plphys/kiaf019.

Metabolic modeling suggested noncanonical algal carbon concentrating mechanism in Cyanidioschyzon merolae

Maneesh Lingwan  1   2
Affiliations

Metabolic modeling suggested noncanonical algal carbon concentrating mechanism in Cyanidioschyzon merolae

Maneesh Lingwan. Plant Physiol. .
No abstract available

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Conflict of interest statement

Conflict of interest statement. None declared.

Figures

Figure.
Figure.
The model illustrates that molecule pools can occur in the boundary layer to form a series of concentric spherical well-mixed compartments in Cyanidioschyzon merolae. The external bulk medium is surrounded by a lipid bilayer as a boundary medium around the cell, followed by the cytosol, with concentric thylakoids and stromal space within the chloroplast. Arrows indicate the metabolic fluxes and pools of dissolved inorganic carbon systems are indicated by molecular formulas such as carbon dioxide (CO2), bicarbonate (HCO3−), and oxygen (O2). PR represents photorespiratory CO2 release, and RL stands for respiration in the light. Small circles denote enzymatically catalyzed fluxes. A range of transport conditions addresses the number of molecules that cross between the cytosol and the stroma, and the energy cost of this transport was captured by varying membrane parameters (V) in compartments. For example, diffusion through lipid membranes represented as V1, V6, V5, V7, and V15 to estimate the conductivity of lipid membranes to the chemical species. Whereas spontaneous interconversion of CO2 and HCO3− represented as in V2, V3, V9, and V10. Reprinted from Steensma et al. (2024).
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