What question did this study set out to answer?

To determine the developmental role of the phosphagen kinase Arginine kinase 1 (Argk1) in Drosophila flight muscle morphogenesis and energy homeostasis beyond acute metabolic stress.

September 18, 2026PLoS GeneticsOpen Access

Arginine Kinase 1 supports energy homeostasis in Drosophila flight muscle development

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Authors

MZMaría Paula ZappiaUniversity of Illinois Chicago AWAnton WestacottUniversity of Illinois Chicago HCHannah CookeUniversity of Illinois Chicago

Discussion

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Implication

Experimental study demonstrates that Arginine kinase 1 maintains ATP homeostasis during Drosophila flight muscle development, highlighting its requirement for sarcomere maturation and growth.

Key Points

To determine the developmental role of the phosphagen kinase Arginine kinase 1 (Argk1) in Drosophila flight muscle morphogenesis and energy homeostasis beyond acute metabolic stress.
Targeted Argk1 for muscle-specific depletion in Drosophila developing flight muscles and wing disc-associated myoblasts.
Profiled the transcriptomes of undifferentiated and differentiating myoblasts using single-cell RNA-sequencing (scRNA-seq).
Evaluated metabolic status via ATP levels and NAD+/NADH ratios, alongside phenotypic assessments of spontaneous muscle contractions, sarcomere maturation, and mitochondrial morphogenesis.
Muscle-specific Argk1 knockdown depleted cellular ATP and lowered the NAD+/NADH ratio, causing animal lethality and reducing myoblast cell size without altering cell cycle progression or early differentiation markers.
Argk1-depleted muscles completely lacked spontaneous contractions, leading to severe defects in sarcomere maturation, disrupted mitochondrial morphogenesis, and severely stunted muscle growth.

Cite This Study

Zappia et al. (2026) studied this question.

synapsesocial.com/papers/6aad0b86de0393d728b89dea https://doi.org/10.1371/journal.pgen.1012304

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September 18, 2026PLoS GeneticsOpen Access

Arginine Kinase 1 supports energy homeostasis in Drosophila flight muscle development

View Full Paper

Ask AI

Bookmark

Authors

MZMaría Paula ZappiaUniversity of Illinois Chicago AWAnton WestacottUniversity of Illinois Chicago HCHannah CookeUniversity of Illinois Chicago

Discussion

Member takes

Implication

Experimental study demonstrates that Arginine kinase 1 maintains ATP homeostasis during Drosophila flight muscle development, highlighting its requirement for sarcomere maturation and growth.

Key Points

To determine the developmental role of the phosphagen kinase Arginine kinase 1 (Argk1) in Drosophila flight muscle morphogenesis and energy homeostasis beyond acute metabolic stress.
Targeted Argk1 for muscle-specific depletion in Drosophila developing flight muscles and wing disc-associated myoblasts.
Profiled the transcriptomes of undifferentiated and differentiating myoblasts using single-cell RNA-sequencing (scRNA-seq).
Evaluated metabolic status via ATP levels and NAD+/NADH ratios, alongside phenotypic assessments of spontaneous muscle contractions, sarcomere maturation, and mitochondrial morphogenesis.
Muscle-specific Argk1 knockdown depleted cellular ATP and lowered the NAD+/NADH ratio, causing animal lethality and reducing myoblast cell size without altering cell cycle progression or early differentiation markers.
Argk1-depleted muscles completely lacked spontaneous contractions, leading to severe defects in sarcomere maturation, disrupted mitochondrial morphogenesis, and severely stunted muscle growth.

Cite This Study

Zappia et al. (2026) studied this question.

synapsesocial.com/papers/6aad0b86de0393d728b89dea https://doi.org/10.1371/journal.pgen.1012304

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