Arginine Kinase 1 supports energy homeostasis in Drosophila flight muscle development.

Arginine kinase 1 is essential for flight muscle development and function in Drosophila, with its depletion causing severe muscle defects and animal lethality.

• Why it matters: Understanding Argk1's role beyond stress conditions fills a knowledge gap about energy regulation during muscle development, which is crucial for muscle growth and activity.
• What they did: Researchers used gene knockdown, ATP and NAD+/NADH measurements, and single-cell RNA sequencing to study Argk1's function in developing Drosophila flight muscles, focusing on muscle morphology and gene expression.
• The result: Depleting Argk1 led to low ATP levels, defective sarcomere maturation, impaired mitochondrial morphogenesis, and absence of spontaneous muscle contractions, highlighting its vital role in sustaining energy for muscle development and flight ability.