Stress Pathway Outputs Are Encoded by PH-dependent Clustering of Kinase Components

Overview

Journal Nat Commun

Specialty Biology

Date 2024 Aug 5

PMID 39103333

Authors

Yuliia Didan

Milad Ghomlaghi

Lan K Nguyen

Dominic C H Ng

Affiliations

Soon will be listed here.

Abstract

Signal processing by intracellular kinases controls near all biological processes but how signal pathway functions evolve with changed cellular context is poorly understood. Functional specificity of c-Jun N-terminal Kinases (JNK) are partly encoded by signal strength. Here we reveal that intracellular pH (pHi) is a significant component of the JNK network and defines signal response to specific stimuli. We show pHi regulates JNK activity in response to cell stress, with the relationship between pHi and JNK activity dependent on specific stimuli and upstream kinases activated. Using the optogenetic clustering tag CRY2, we show that an increase in pHi promotes the light-induced phase transition of ASK1 to augment JNK activation. While increased pHi similarly promoted CRY2-tagged JNK2 to form light-induced condensates, this attenuated JNK activity. Mathematical modelling of feedback signalling incorporating pHi and differential contributions by ASK1 and JNK2 condensates was sufficient to delineate signal responses to specific stimuli. Taking pHi and ASK1/JNK2 signal contributions into consideration may delineate oncogenic versus tumour suppressive JNK functions and cancer cell drug responses.

Citing Articles

Stress pathway outputs are encoded by pH-dependent clustering of kinase components.

Didan Y, Ghomlaghi M, Nguyen L, Ng D Nat Commun. 2024; 15(1):6614.

PMID: 39103333 PMC: 11300869. DOI: 10.1038/s41467-024-50638-w.

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