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Pheromone biosynthesis activating neuropeptides: functions and chemistry
P E Teal1, R L Abernathy, R J Nachman
1Insect Attractants, Behavior and Basic Biology Research Laboratory, USDA-ARS, Gainesville, FL 32604, USA.
Peptides
|January 1, 1996
Summary
Sex pheromone biosynthesis in Lepidoptera is regulated by pheromone biosynthesis activating neuropeptides (PBAN). These peptides and related pyrokinins share a C-terminal motif crucial for pheromonotropic activity, suggesting complex regulation.
Area of Science:
- Insect reproductive biology
- Neuroendocrinology
- Chemical ecology
Background:
- Sex pheromones are vital for Lepidoptera reproduction.
- Pheromone biosynthesis activating neuropeptides (PBAN) regulate pheromone production.
- PBANs are 33-34 amino acid peptides with conserved C-terminal sequences.
Purpose of the Study:
- To investigate the role of PBAN and related peptides in regulating pheromone biosynthesis.
- To explore the structural and functional similarities between PBAN and pyrokinins.
- To understand the diversity of peptides involved in pheromone production regulation.
Main Methods:
- Comparative sequence analysis of PBAN and pyrokinin peptides.
- Structure-activity relationship studies of pheromonotropic activity.
- Identification of pheromonotropic peptides from moth sources.
Main Results:
- PBAN and pyrokinin peptides share a conserved C-terminal pentapeptide motif (FSPRL-NH2 or FXPRL-NH2).
- This pentapeptide region is essential for pheromonotropic activity.
- Pyrokinins exhibit varying degrees of pheromonotropic activity, with some acting as superagonists.
- Other identified peptides with C-terminal homology to PBAN also possess pheromonotropic activity.
Conclusions:
- Pheromone biosynthesis induction is likely regulated by multiple peptides beyond PBAN.
- PBAN may possess diverse physiological functions.
- Peptides regulate pheromone production induction through various mechanisms.