COQ4 gene
The COQ4 gene provides instructions for a protein that is essential for the production of coenzyme Q10, a molecule vital for cellular energy and antioxidant defense.
Normal Function
The COQ4 gene provides instructions for making a protein involved in the production of coenzyme Q10. While its specific role is not fully understood, research suggests the COQ4 protein helps organize other proteins involved in coenzyme Q10 production into a stable functional group (a protein complex).
Coenzyme Q10 is critical for several cellular functions:
- Oxidative phosphorylation: Converting energy from food into a usable form within mitochondria.
- Pyrimidine production: Creating building blocks for DNA, RNA, and energy sources like ATP and GTP.
- Antioxidant protection: Protecting cells from damage caused by free radicals.
Health Conditions Related to Genetic Changes
Primary coenzyme Q10 deficiency
At least 12 mutations in the COQ4 gene have been found to cause primary coenzyme Q10 deficiency. This rare disease usually becomes apparent in infancy or early childhood, but it can occur at any age and most often affects the brain, muscles, and kidneys.
- Mutations associated with this disorder greatly reduce or eliminate the production of the COQ4 protein, preventing normal coenzyme Q10 production.
- A deficiency of coenzyme Q10 impairs oxidative phosphorylation and increases the vulnerability of cells to damage from free radicals.
- The deficiency may also disrupt the production of pyrimidines.
- These combined changes cause cells throughout the body to malfunction, explaining the variety of organs and tissues affected by the condition.