Phosphate helps Candida reorganise its cell wall under oxidative stress

A wall with a changing structure

A fungal cell wall is a dynamic structure. Anand Jacob and colleagues investigated how Candida albicans changes this structure during phosphate deprivation and oxidative stress. Their paper appeared in Nature Communications on 10 September 2026. At verification, the publisher was providing an accepted version ahead of final editing.

The team used solid-state nuclear magnetic resonance spectroscopy, or NMR, to examine the organisation, mobility and hydration of cell-wall polymers. This approach goes beyond listing the substances a cell contains. It asks how those components are arranged and how their behaviour changes when the surrounding conditions change.

Two pressures need to be distinguished

The authors frame their work around a transition in which the fungus moves from coexistence with its host towards tissue invasion. Phosphate limitation can then coincide with strong oxidative stress. The experiments separate nutrient limitation from exposure to hydrogen peroxide, allowing the responses to be examined together and individually.

Phosphate-deprived cells remodelled the rigid wall core even without oxidative stress. Wall hydration and polymer mobility also decreased. The finding means that nutrient availability had already affected the architecture of the protective structure before the second challenge was applied. The wall was responding to its conditions rather than serving as an unchanging package around the cell.

Normal cells and transport mutants respond differently

During hydrogen peroxide exposure, highly mobile polysaccharides in the outer wall were important interactors. In wildtype cells, some of these polymers became incorporated into the rigid core, strengthening its scaffold. Mutants with impaired phosphate transport failed to carry out this remodelling response.

That comparison matters for the interpretation. Observing a wall change alone would not establish what enables it. Comparing normal cells with transport mutants connects phosphate acquisition to the structural response under stress. The work therefore links fungal nutrition with a protective mechanism visible in the material organisation of the wall itself.

A research direction, without a clinical claim

The authors identify this connection as relevant to future antifungal development. It is a finding about a cellular mechanism and a possible vulnerability; it does not demonstrate that a new treatment works in patients. Nor does it establish a reason to alter dietary phosphorus. Experimental nutrient conditions and changes to fungal transport machinery are not equivalent to such an intervention.

For mycology, the useful shift in perspective is that mineral availability affects more than growth. It also influences how a cell organises the structure separating it from its environment. This original editorial explanation condenses findings by Jacob and colleagues from their paper, available under CC BY 4.0.