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. 2025 Aug 4;11(8):1670–1680. doi: 10.1038/s41477-025-02056-z

Fig. 4. Proposed mechanism for auxin import by LAX3.

Fig. 4

In the outward open conformation, IAA enters the binding site with a proton. In the occluded conformations, IAA is stabilized in the central binding pocket by its interaction to His247 and surrounding residues. On the cytosolic side, IAA and the proton are then released, involving unwinding of M5 and movement of Arg192.