Kreatinfosfátu

Kreatinfosfátu, often referred to as creatine phosphate or phosphocreatine, is a high-energy phosphate molecule found primarily in muscle and nerve tissue. It plays a crucial role in cellular energy metabolism by acting as a rapid source of phosphate for the regeneration of adenosine triphosphate (ATP), the body's main energy currency. During periods of intense, short-duration activity, such as sprinting or weightlifting, ATP is quickly depleted. Kreatinfosfátu can donate its phosphate group to adenosine diphosphate (ADP) through the enzyme creatine kinase, thereby resynthesizing ATP and allowing muscle cells to continue contracting.

The body synthesizes kreatinfosfátu from the amino acids arginine, glycine, and methionine, with the liver and kidneys being the primary sites of production. Muscles store a significant amount of this compound, with levels typically being two to three times higher than those of ATP. This storage system acts as a buffer, ensuring a readily available supply of energy for immediate demands. Dietary intake of creatine, found in foods like red meat and fish, can also contribute to muscle stores of kreatinfosfátu. Supplementation with creatine is common among athletes seeking to enhance anaerobic performance and muscle power.