Putrescine

Biosynthesis of polyamines, including putrescine.

Putrescine is a biogenic amine that is involved in various biological processes. It is a foul-smelling organic chemical compound produced by the breakdown of amino acids in living and dead organisms. Putrescine is one of the simplest polyamines, which are organic compounds having two or more primary amino groups.

Structure and Properties

Putrescine is a diaminoalkane with the chemical formula C_H__N_. It is a colorless solid that melts at 27 °C and boils at 158 °C. The compound is soluble in water and has a strong, unpleasant odor reminiscent of decaying flesh.

Biological Role

Putrescine is synthesized in living cells from the amino acid ornithine by the action of the enzyme ornithine decarboxylase. It is a precursor to other polyamines such as spermidine and spermine, which are essential for cell growth and differentiation. These polyamines are involved in stabilizing DNA and RNA structures, modulating enzyme activities, and influencing ion channel functions.

Synthesis

Putrescine is synthesized in a two-step process:

1. Decarboxylation of Ornithine: The enzyme ornithine decarboxylase catalyzes the removal of a carboxyl group from ornithine, producing putrescine.

2. Conversion to Higher Polyamines: Putrescine can be further converted into spermidine and spermine through the addition of aminopropyl groups, which are derived from S-adenosylmethionine.

Industrial Applications

Putrescine is used in the production of nylon-4,6, a type of polyamide that is used in the manufacture of engineering plastics. It is also used in the synthesis of agrochemicals and pharmaceuticals.

Health Implications

While putrescine is essential for normal cellular functions, elevated levels can be toxic and are associated with various pathological conditions, including cancer and neurodegenerative diseases.

Related Pages

• Polyamine
• Ornithine decarboxylase
• Spermidine
• Spermine