Erythrose 4-phosphate

Erythrose 4-phosphate

The DAHP synthase reaction involving erythrose 4-phosphate.

Erythrose 4-phosphate is a key intermediate in the pentose phosphate pathway and plays a crucial role in the biosynthesis of aromatic amino acids. It is a phosphorylated derivative of the simple sugar erythrose.

Structure and Properties

Erythrose 4-phosphate is a four-carbon sugar phosphate. It is an aldose, meaning it contains an aldehyde group. The chemical formula for erythrose 4-phosphate is C_H_O_P. It is a colorless compound that is soluble in water.

Biological Role

Erythrose 4-phosphate is primarily involved in the shikimate pathway, which is responsible for the biosynthesis of aromatic compounds in plants, fungi, and bacteria. This pathway is not present in animals, making it a target for herbicides and antibiotics.

Shikimate Pathway

In the shikimate pathway, erythrose 4-phosphate combines with phosphoenolpyruvate to form 3-deoxy-D-arabino-heptulosonate 7-phosphate (DAHP) in a reaction catalyzed by the enzyme DAHP synthase. This reaction is the first step in the pathway leading to the production of chorismate, a precursor for the synthesis of aromatic amino acids such as phenylalanine, tyrosine, and tryptophan.

Pentose Phosphate Pathway

Erythrose 4-phosphate is also an intermediate in the pentose phosphate pathway, which is important for the generation of NADPH and the synthesis of ribose 5-phosphate, a precursor for nucleotide synthesis.

Related Pages

• Pentose phosphate pathway
• Shikimate pathway
• Aromatic amino acid
• DAHP synthase