Plant derived cyclic peptides.

Area of Science:

• Biochemistry
• Molecular Biology
• Plant Science

Background:

• Cyclic peptides are abundant in plants, possessing varied sequences, structures, and biological activities.
• Despite decades of research and gene sequence discovery, the intricate biosynthesis of plant cyclic peptides is only recently being elucidated.
• Three primary classes of plant-derived cyclic peptides—orbitides, SFTI-related peptides, and cyclotides—are the focus of recent investigations.

Purpose of the Study:

• To review the expanding sequence and structural diversity within major plant cyclic peptide families.
• To provide insights into the enzymatic machinery responsible for the biosynthesis of these peptides.
• To highlight the diverse applications of plant cyclic peptides, including a cyclotide in clinical trials for multiple sclerosis, and emerging production strategies.

Main Methods:

• Literature review of recent studies on plant cyclic peptides.
• Analysis of sequence and structural data for orbitides, SFTI-related peptides, and cyclotides.
• Examination of research on biosynthetic enzymes and novel production techniques.

Main Results:

• Significant expansion in the known sequence and structural diversity of plant cyclic peptide families.
• Identification and characterization of key enzymes involved in plant cyclic peptide biosynthesis.
• Demonstration of promising applications, including a cyclotide for multiple sclerosis treatment, and development of new production methods.

Conclusions:

• Plant cyclic peptides represent a rich source of bioactive molecules with significant pharmaceutical and agricultural potential.
• Continued research into their biosynthesis and structure-activity relationships will unlock new therapeutic and agrochemical agents.
• Advancements in production methods are crucial for realizing the full potential of these natural compounds.