High-throughput ESI-MS analysis of binding between the Bombyx mori pheromone-binding protein BmorPBP1, its pheromone...

Chip-assisted high-throughput ESI-MS analysis of the pheromone-binding protein of the silkworm moth Bombyx mori, BmorPBP1, incubated with its pheromone components bombykol, bombykal and analogues was developed. The protein bound to bombykol ((10E,12Z)-hexadecadien-1-ol) and all 3 of its geometric isomers to a lesser extent, and showed relaxed specificity toward different chain lengths possessing unsaturation. BmorPBP1 did not bind to bombykal ((10E,12Z)-hexadecadienal), demonstrating molecular recognition of the insect pheromone components.