Fructose 1-phosphate

Overview

Structure of Fructose 1-phosphate

Fructose 1-phosphate is a phosphorylated derivative of fructose, a simple sugar found in many foods. It plays a crucial role in the metabolism of fructose, particularly in the liver.

Structure

Fructose 1-phosphate is a monosaccharide phosphate ester. It consists of a fructose molecule with a phosphate group attached to the first carbon atom. This structure is important for its role in metabolic pathways.

Metabolic Pathway

Fructose 1-phosphate is primarily involved in the fructolysis pathway. When fructose is ingested, it is phosphorylated by the enzyme fructokinase to form fructose 1-phosphate. This reaction occurs mainly in the liver.

Role in Fructolysis

In the liver, fructose 1-phosphate is further metabolized by the enzyme aldolase B, which cleaves it into dihydroxyacetone phosphate (DHAP) and glyceraldehyde. These products can then enter the glycolysis pathway, contributing to the production of ATP and other metabolic intermediates.

Clinical Significance

Fructose 1-phosphate is significant in the context of hereditary fructose intolerance (HFI), a genetic disorder caused by a deficiency of aldolase B. In individuals with HFI, the accumulation of fructose 1-phosphate in the liver can lead to severe hypoglycemia and other metabolic disturbances.

Related Enzymes

• Fructokinase: Catalyzes the phosphorylation of fructose to fructose 1-phosphate.
• Aldolase B: Cleaves fructose 1-phosphate into DHAP and glyceraldehyde.

Related Pages

• Fructose
• Glycolysis
• Metabolism
• Hereditary fructose intolerance