A TIR1-independent Auxin Signaling Module

doi:10.11983/CBB19063

Abstract

Abstract: The most well established auxin signaling pathway is initiated from transport inhibitor response (TIR1)-mediated perception and degradation of Aux/IAAs, eventually leads to depression of auxin response factors (ARFs). A recent study from the Tongda Xu lab showed that high levels of auxin induced the cleavage of the plasma membrane localized transmembrane kinase receptor 1 (TMK1). The cleaved TMK1 C-terminus translocated to the nucleus and phosphorylated the nuclear localized non-canonical IAA32/34, which regulate the auxin signaling response by interacting with ARFs. The TMK1-IAA32/34-ARFs module, acting independently from the TIR1-dependent auxin signaling pathway, nicely interprets how the local auxin accumulation modulates asymmetric growth during apical hook development.

Key words: auxin, signal transduction, TMK1

Kongqin Hu, Zhaojun Ding. A TIR1-independent Auxin Signaling Module[J]. Chinese Bulletin of Botany, 2019, 54(3): 293-295.

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URL: https://www.chinbullbotany.com/EN/10.11983/CBB19063

https://www.chinbullbotany.com/EN/Y2019/V54/I3/293

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References 10

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