Auxin transport at the endoplasmic reticulum: Roles and structural similarity of PIN-FORMED and PIN-LIKES

Kien Lam Ung, Lukas Schulz, Jürgen Kleine-Vehn, Bjørn Panyella Pedersen*, Ulrich Z Hammes

*Corresponding author af dette arbejde

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avisReviewForskningpeer review

Abstract

Auxin is a crucial plant hormone that controls a multitude of developmental processes. The directional movement of auxin between cells is largely facilitated by the canonical PIN-FORMED (PIN) proteins in the plasma membrane. In contrast, noncanonical PIN and the PIN-LIKES (PILS) proteins appear to reside mainly in the endoplasmic reticulum (ER). Despite recent progress in identifying the roles of the ER in cellular auxin responses, the transport dynamics of auxin at the ER are not well understood. PILS are structurally related to PINs, and recently structures of PINs opened for new insights into PIN and PILS function. In this review, we summarize the current knowledge on PINs and PILS in intracellular auxin transport. We discuss the physiological properties of the ER and the consequences for transport processes across the ER membrane. Finally, we highlight the emerging role of the ER in the dynamics of cellular auxin signalling and its impact on plant development.

OriginalsprogEngelsk
TidsskriftJournal of Experimental Botany
Vol/bind74
Nummer22
Sider (fra-til)6893-6903
Antal sider11
ISSN0022-0957
DOI
StatusUdgivet - dec. 2023

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