Erythrose

Structural formula of DL-Erythrose

Erythrose is a tetrose monosaccharide with the chemical formula C_H_O_. It is an important intermediate in several biochemical pathways, including the pentose phosphate pathway.

Structure

Erythrose is a four-carbon aldose, meaning it contains an aldehyde group. It exists in two enantiomeric forms: D-erythrose and L-erythrose. The D-form is the one most commonly found in nature. The structure of erythrose can be represented by the Fischer projection, which shows the arrangement of hydroxyl groups around the chiral centers.

Biological Role

In biological systems, erythrose is involved in the pentose phosphate pathway, which is crucial for the production of NADPH and ribose 5-phosphate. NADPH is essential for anabolic reactions, including lipid synthesis and nucleotide synthesis, while ribose 5-phosphate is a precursor for the synthesis of nucleotides and nucleic acids.

Synthesis

Erythrose can be synthesized through the oxidation of erythritol, a sugar alcohol. It can also be produced via the degradation of more complex carbohydrates in metabolic pathways.

Chemical Properties

Erythrose is a reducing sugar, meaning it can donate electrons to other molecules. This property is due to the presence of the free aldehyde group, which can be oxidized to a carboxylic acid.

Related Compounds

Erythrose is related to other tetroses, such as threose, which differs in the configuration of its hydroxyl groups. It is also related to erythrulose, a ketose form of erythrose.

Related Pages

• Pentose phosphate pathway
• Monosaccharide
• Aldose
• NADPH
• Ribose 5-phosphate