Tag: Cellular homeostasis

Protein ubiquitination is a fundamental post-translational modification that regulates protein degradation, cellular signaling, DNA repair, autophagy, protein trafficking and cellular homeostasis.

Nutrient deprivation creates metabolic stress that suppresses mTOR, activates AMPK and induces autophagy. These pathways help cells conserve energy, recycle intracellular components and maintain homeostasis during starvation or limited nutrient availability. Prolonged nutrient deprivation influences gene expression, stress signalling and survival mechanisms across diverse cell types.

Hydrolytic enzymes catalyse the breakdown of macromolecules by adding water to chemical bonds. Found in lysosomes, digestive organs and immune cells, they degrade proteins, nucleic acids, lipids and carbohydrates. Their activity maintains cellular homeostasis, supports nutrient acquisition and protects against pathogens, while dysregulation contributes to metabolic and degenerative diseases.

Cellular homeostasis is the dynamic process that maintains internal stability by regulating ions, metabolism, proteostasis, organelle function and genomic integrity. Through coordinated signalling networks and adaptive stress responses, cells preserve equilibrium and protect themselves from dysfunction and disease.

Membrane trafficking is the vesicular transport system that moves proteins and lipids between organelles, enabling secretion, endocytosis and cellular signalling. Regulated by Rab GTPases, coat proteins and SNARE complexes, these pathways maintain organelle identity, nutrient uptake and membrane turnover, forming a central mechanism of eukaryotic cell organisation.