Receptor-Ribosome Coupling: A Link Between Extrinsic Signals and mRNA Translation in Neuronal Compartments.

Area of Science:

• Neuroscience
• Molecular Biology
• Cell Biology

Background:

• Axons require extracellular signals for development, function, and survival.
• Cell surface receptors mediate these signals, initiating local intracellular events like mRNA translation.
• Local mRNA translation allows for rapid, spatially controlled changes in neuronal proteomes.

Purpose of the Study:

• To review evidence for receptor-mediated local mRNA translation in axons.
• To discuss the molecular mechanisms underlying receptor-ribosome coupling.
• To propose receptor-ribosome coupling as a key mechanism in neuronal cell communication.

Main Methods:

• Literature review and synthesis of existing research.
• Analysis of molecular mechanisms linking receptors to translational machinery.
• Conceptual advancement of receptor-ribosome coupling as a common signaling paradigm.

Main Results:

• Growing evidence supports external stimuli triggering specific mRNA translation in axons via receptors.
• Receptor-mediated mechanisms, particularly direct receptor-ribosome coupling, regulate local mRNA translation.
• Receptor-ribosome coupling provides advantages in spatiotemporal resolution and efficiency.

Conclusions:

• Receptor-mediated local mRNA translation is crucial for both developing and mature neurons.
• Direct receptor-ribosome coupling is a significant mechanism for regulating local protein synthesis in axons.
• This coupling represents a fundamental mode of cell communication with broad implications.