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Clueless forms dynamic, insulin-responsive bliss particles sensitive to stress.

K M Sheard1, S A Thibault-Sennett1, A Sen1

  • 1Department of Biochemistry and Molecular Biology, Uniformed Services University, Bethesda, MD, 20814, USA.

Developmental Biology
|December 15, 2019
PubMed
Summary
This summary is machine-generated.

Drosophila Clueless (Clu) forms unique cytoplasmic particles, termed "bliss particles," that associate with mitochondria. These particles disperse under stress, indicating a role in cellular health and mitochondrial function.

Keywords:
CluelessDrosophilaInsulinMitochondriaRibonucleoprotein particle

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Area of Science:

  • Cell Biology
  • Mitochondrial Biology
  • Molecular Genetics

Background:

  • Drosophila Clueless (Clu) is a ribonucleoprotein impacting mitochondrial function.
  • Clu associates with proteins on the mitochondrial outer membrane and forms cytoplasmic particles.
  • Ribonucleoprotein particles regulate mRNA spatially and temporally.

Purpose of the Study:

  • To investigate the nature and function of Clu particles.
  • To determine the conditions affecting Clu particle formation and stability.
  • To explore the conservation of Clu function in yeast.

Main Methods:

  • Microscopy to observe Clu particle localization and dynamics.
  • Dietary manipulation and starvation experiments.
  • Analysis of insulin signaling pathways.
  • Stress induction experiments (oxidative stress).
  • Comparative analysis with yeast homolog Clu1p.

Main Results:

  • Clu particles are unique, dynamic cytoplasmic structures associated with mitochondria.
  • Clu particle formation is dependent on diet and insulin signaling.
  • Particles rapidly disperse in response to various stresses, including starvation and oxidative stress.
  • Absence of Clu particles correlates with altered cellular stress response and mitochondrial localization.
  • Key aspects of Clu function are conserved in yeast Clu1p.

Conclusions:

  • Clu particles, termed "bliss particles," are stress-sensitive cytoplasmic structures crucial for mitochondrial health.
  • Their dynamic nature and environmental dependence highlight a role in cellular adaptation to optimal conditions.
  • Clu function and particle behavior are conserved across species, suggesting fundamental biological importance.