Protein kinase A controls yeast growth in visible light
Artikel i vetenskaplig tidskrift, 2020

Background: A wide variety of photosynthetic and non-photosynthetic species sense and respond to light, having developed protective mechanisms to adapt to damaging effects on DNA and proteins. While the biology of UV light-induced damage has been well studied, cellular responses to stress from visible light (400–700 nm) remain poorly understood despite being a regular part of the life cycle of many organisms. Here, we developed a high-throughput method for measuring growth under visible light stress and used it to screen for light sensitivity in the yeast gene deletion collection. Results: We found genes involved in HOG pathway signaling, RNA polymerase II transcription, translation, diphthamide modifications of the translational elongation factor eEF2, and the oxidative stress response to be required for light resistance. Reduced nuclear localization of the transcription factor Msn2 and lower glycogen accumulation indicated higher protein kinase A (cAMP-dependent protein kinase, PKA) activity in many light-sensitive gene deletion strains. We therefore used an ectopic fluorescent PKA reporter and mutants with constitutively altered PKA activity to show that repression of PKA is essential for resistance to visible light. Conclusion: We conclude that yeast photobiology is multifaceted and that protein kinase A plays a key role in the ability of cells to grow upon visible light exposure. We propose that visible light impacts on the biology and evolution of many non-photosynthetic organisms and have practical implications for how organisms are studied in the laboratory, with or without illumination.

Light sensitivity

HOG signaling

Genome-wide screen

Protein kinase A


Diphthamide modification

Visible light


Mikael Molin

Göteborgs universitet

Chalmers, Biologi och bioteknik, Systembiologi

Katarina Logg

Chalmers, Fysik, F forskningsinfrastruktur (CMAL)

Göteborgs universitet

Kristofer Bodvard

Chalmers, Fysik, Bionanofotonik

K. Peeters

Göteborgs universitet

Annabelle Forsmark

Göteborgs universitet

F. Roger

Göteborgs universitet

Anna Jorhov

Göteborgs universitet

Neha Mishra

Göteborgs universitet

Horizon Discovery

Jean Marc Billod

Göteborgs universitet

Bio-Me A/S

Sabiha Amir

Göteborgs universitet

Mikael Andersson

Göteborgs universitet

Leif A Eriksson

Göteborgs universitet

Jonas Warringer

Göteborgs universitet

Mikael Käll

Chalmers, Fysik, Nano- och biofysik

Anders Blomberg

Göteborgs universitet

BMC Biology

1741-7007 (eISSN)

Vol. 18 1 168

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Vetenskapsrådet (VR) (2017-04545), 2018-01-01 -- 2021-12-31.


Biokemi och molekylärbiologi

Annan fysik

Medicinsk bioteknologi (med inriktning mot cellbiologi (inklusive stamcellsbiologi), molekylärbiologi, mikrobiologi, biokemi eller biofarmaci)





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