Study gives a better understanding of how housekeeping takes place in cells

New study gives a better understanding of how housekeeping takes place in cells
Increasing temperature breaks the molecular bound between two DegP units and initiates their proteolytic activity. Credit: Johannes Thomas.

Normal household waste is collected and disposed of by waste collectors, and a similar process occurs in cells to remove damaged and potentially harmful proteins. A new research study in Science Advances provides a better understanding of how this is done.

The cells use proteases for housekeeping in almost the same way as collectors dispose of household waste.

"Think about what happens when waste collectors go on strike in a big city. Similarly, a non-functioning waste collection system in a cell can lead to chaos when damaged proteins accumulate. This could allow serious diseases to develop," says Björn M. Burmann, senior lecturer and researcher in chemistry at the University of Gothenburg, and team leader for the researchers behind the new study.

Neutralises harmful proteins

The researchers used the single-cell bacterium Escherichia coli as a model system to gain a better understanding of how proteases keep clean. This is a bacterium that is found in the human intestine that has adapted to survive under a range of stressful environmental conditions.

"One of the waste collection disposal workers in the bacterial cell is the enzyme DegP, a protease that can eliminate unstable and by shredding them into pieces and thus prevent them from building up in the cell," says Darius Šulskis, principal author of the study and doctoral student in Björn M. Burmann's research group.

Temperature switches activate response

Until now it was unknown what activated DegP, but Darius Šulskis has shown in the study that DegP is activated by a temperature switch is controlled at a . DegP is inactive at low temperatures but activates at high temperatures. This starts up the waste disposal work in the cell, disposing of hazardous rubbish.

"Understanding this built-in cleaning mechanism means that it can be used in and be important for future medical applications," says Björn M. Burmann.

More information: Darius Šulskis et al, Structural basis of DegP protease temperature-dependent activation, Science Advances (2021). DOI: 10.1126/sciadv.abj1816

Journal information: Science Advances

Citation: Study gives a better understanding of how housekeeping takes place in cells (2021, December 9) retrieved 21 June 2024 from https://phys.org/news/2021-12-housekeeping-cells.html
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