Translational Control under Stress: Reshaping the Translatome.

Area of Science:

• Molecular Biology
• Cellular Stress Response
• Protein Synthesis Regulation

Background:

• Cellular metabolism must adapt to stress for survival.
• Protein synthesis is energy-intensive and tightly regulated under stress.
• Stress-activated kinases inhibit general translation and promote stress-responsive protein synthesis.

Purpose of the Study:

• To review the molecular mechanisms regulating protein synthesis during cellular stress.
• To highlight the role of transfer RNA (tRNA) in stress-induced translational reprogramming.

Main Methods:

• Literature review of stress-induced translational reprogramming.
• Analysis of signal transduction pathways and tRNA metabolism in stress response.

Main Results:

• Stress leads to inhibition of general translation and activation of stress-responsive protein synthesis.
• Messenger RNA (mRNA) transcripts accumulate in stress granules.
• Transfer RNA (tRNA) modifications, pools, miscoding, and cleavage are critical in stress-induced translation.

Conclusions:

• Signal transduction pathways and tRNA metabolism changes collaboratively regulate translation during stress.
• These regulatory mechanisms are essential for cellular adaptation and survival under stress.