Shmoo tip protein, substrate of Hub1p ubiquitin-like protein; mutants are defective for mating projection formation, thereby implicating Hbt1p in polarized cell morphogenesis; HBT1 has a paralog, YNL195C, that arose from the whole genome duplication.
HBT1 is a potent α-Amino-3-hydroxy-5-methyl-4-isoxazole-propionic acid (AMPA) receptor (AMPA-R) potentiator. HBT1 bonds with S518 in the ligand-binding domain (LBD) of AMPA-R in a glutamate-dependent manner. HBT1 did not show remarkable bell-shaped response in brain-derived neurotrophic factor (BDNF) production in primary neurons[1].
HBT1(YDL223C) is an AMPA-R [alpha-amino-3-hydroxy-5-methyl-4-isoxazole-propionic acid (AMPA) receptor] potentiator that induces production of brain-derived neurotrophic factor (BDNF) and exhibits little agonistic effect in primary neurons. HBT1 binds to ligand-binding domain of AMPA-R in glutamate dependent manner.
[1] Akiyoshi Kunugi, et al. HBT1, a Novel AMPA Receptor Potentiator with Lower Agonistic Effect, Avoided Bell-Shaped Response in In Vitro BDNF Production. J Pharmacol Exp Ther. 2018 Mar;364(3):377-389. DOI:
10.1124/jpet.117.245050
