The synthetic ABA agonist pyrabactin helped identify the PYR/PYL family of ABA receptors. Now the selectivity of pyrabactin toward specific members of this family is explained using genetic, chemical and structural approaches. Subtle differences in the binding pockets of the receptors lead to productive or nonproductive conformations upon pyrabactin binding.
- Francis C Peterson
- E Sethe Burgie
- Brian F Volkman