Tag: Metabolism

Lysine malonylation is a metabolic post-translational modification that connects malonyl-CoA metabolism with protein function, mitochondrial activity, epigenetic regulation and cellular homeostasis.

Cells are dynamic systems that perform essential functions such as metabolism, respiration, signaling, migration, division, and homeostasis. This article explores how these interconnected processes sustain life at the microscopic level.

Metabolic disorders occur when biochemical pathways responsible for processing nutrients and generating energy become disrupted. These conditions may involve defects in glycolysis, fatty‑acid oxidation, mitochondrial function or endocrine signalling. Their consequences range from mild metabolic imbalance to severe systemic disease, affecting growth, neurological function and long‑term health.

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.

ATP is the cell’s major energy-transfer molecule, powering cellular work through hydrolysis and phosphorylation while connecting metabolism with transport, movement, biosynthesis, and signaling.

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.