What Are Mitochondria?

Mitochondria are the “powerhouses” of the cell — tiny structures that produce most of a cell’s energy. They’re a major focus of metabolic and aging research, which is why several research compounds target them. Here’s a quick primer.

• What they do: generate cellular energy (ATP).
• Their own DNA: mitochondria carry a small, separate genome.
• Research interest: mitochondrial function is studied in metabolism and aging.

What mitochondria do

Mitochondria convert nutrients into ATP, the molecule cells use for energy. They have their own membrane system and even their own DNA — a clue to their ancient evolutionary origin. Because energy production touches almost everything a cell does, mitochondria are central to metabolic research.

Mitochondria in peptide research

Several research compounds are studied for how they interact with mitochondria:

• MOTS-c — a peptide actually encoded by mitochondrial DNA.
• SS-31 — a peptide that targets the inner mitochondrial membrane.
• NAD+ — a coenzyme central to mitochondrial energy metabolism.

For a side-by-side of two mitochondrial peptides, see MOTS-c vs SS-31.