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PIN-FORMED and PIN-LIKES auxin transport facilitators
Michael Sauer1, Jürgen Kleine-Vehn2
1Institute for Biochemistry and Biology, University of Potsdam, 14476 Potsdam, Germany michael.sauer@uni-potsdam.de juergen.kleine-vehn@boku.ac.at.
Abstract:
The phytohormone auxin influences virtually all aspects of plant growth and development. Auxin transport across membranes is facilitated by, among other proteins, members of the PIN-FORMED (PIN) and the structurally similar PIN-LIKES (PILS) families, which together govern directional cell-to-cell transport and intracellular accumulation of auxin. Canonical PIN proteins, which exhibit a polar localization in the plasma membrane, determine many patterning and directional growth responses. Conversely, the less-studied non-canonical PINs and PILS proteins, which mostly localize to the endoplasmic reticulum, attenuate cellular auxin responses. Here, and in the accompanying poster, we provide a brief summary of current knowledge of the structure, evolution, function and regulation of these auxin transport facilitators.
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