The FKBP42, TWISTED DWARF1, prioritizes auxin over brassinosteroid transport by peptidyl-prolyl cis-trans isomerization of ABCB1
Tashi Tsering, Francesca Romana Iacobini, Jennifer L. Sapia, Martin Di Donato, Aurélien Bailly, Peter Hunyadi, Xiaoyu Xia, Hong Wei, Tamás Hegedűs, Markus M. Geisler
The paper shows TWD1 enhances IAA transport by isomerizing the E1007-P1008 bond in ABCB1, while not affecting BL transport, revealing a mechanism that prioritizes auxin over brassinosteroid transport.
bioRxiv · Jul 27, 2026 · PreprintBiochemistry