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Author Spotlight: Examining Volatile Sex Pheromone Influence on Male C. elegans Behavior

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Disrupting Pheromone Signaling in Insects: Design, Synthesis, and Evaluation of an Inhibitor.

Pratikshya Paudel¹, Ishani Ray¹, Omar Al Danoon¹

¹Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States.

|March 9, 2026

Summary

This study designed a novel pheromone analog to inhibit Antheraea polyphemus PBP1, a key protein in insect mate recognition. The analog showed reduced binding affinity, demonstrating PBP sensitivity to ligand structure for pest management applications.

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Area of Science:

Insect chemical ecology
Biochemistry
Molecular biology

Background:

Insect sex pheromones are crucial for mate recognition and reproduction.
Pheromone-binding proteins (PBPs) transport these pheromones.
Targeting PBP-pheromone interactions offers species-specific pest control strategies.

Purpose of the Study:

To design, synthesize, and evaluate a novel pheromone analog as an inhibitor of Antheraea polyphemus PBP1 (ApolPBP1).
To investigate the binding interactions between the analog and ApolPBP1 at a molecular level.

Main Methods:

Molecular docking simulations to predict binding modes.
Fluorescence-based binding assays to quantify dissociation constants.
2D [1H, 15N] HSQC NMR titrations to assess binding affinity and conformational changes.

Main Results:

The synthesized pheromone analog exhibited a 4-fold higher dissociation constant for ApolPBP1 compared to natural ligands.
NMR titrations confirmed reduced binding affinity, with ApolPBP1 requiring higher analog concentrations to reach a bound state.
Molecular docking provided insights into potential binding orientations and interactions.

Conclusions:

Antheraea polyphemus PBP1 is sensitive to subtle structural modifications in its ligands.
Effective binding of pheromone analogs to PBPs requires preservation of key molecular interactions.
This research contributes to the development of targeted insect pest management strategies.