--- _id: '7600' abstract: - lang: eng text: Directional intercellular transport of the phytohormone auxin mediated by PIN FORMED (PIN) efflux carriers plays essential roles in both coordinating patterning processes and integrating multiple external cues by rapidly redirecting auxin fluxes. Multilevel regulations of PIN activity under internal and external cues are complicated; however, the underlying molecular mechanism remains elusive. Here we demonstrate that 3’-Phosphoinositide-Dependent Protein Kinase1 (PDK1), which is conserved in plants and mammals, functions as a molecular hub integrating the upstream lipid signalling and the downstream substrate activity through phosphorylation. Genetic analysis uncovers that loss-of-function Arabidopsis mutant pdk1.1 pdk1.2 exhibits a plethora of abnormalities in organogenesis and growth, due to the defective PIN-dependent auxin transport. Further cellular and biochemical analyses reveal that PDK1 phosphorylates D6 Protein Kinase to facilitate its activity towards PIN proteins. Our studies establish a lipid-dependent phosphorylation cascade connecting membrane composition-based cellular signalling with plant growth and patterning by regulating morphogenetic auxin fluxes. acknowledged_ssus: - _id: Bio - _id: LifeSc article_processing_charge: No article_type: original author: - first_name: Shutang full_name: Tan, Shutang id: 2DE75584-F248-11E8-B48F-1D18A9856A87 last_name: Tan orcid: 0000-0002-0471-8285 - first_name: Xixi full_name: Zhang, Xixi id: 61A66458-47E9-11EA-85BA-8AEAAF14E49A last_name: Zhang orcid: 0000-0001-7048-4627 - first_name: Wei full_name: Kong, Wei last_name: Kong - first_name: Xiao-Li full_name: Yang, Xiao-Li last_name: Yang - first_name: Gergely full_name: Molnar, Gergely id: 34F1AF46-F248-11E8-B48F-1D18A9856A87 last_name: Molnar - first_name: Zuzana full_name: Vondráková, Zuzana last_name: Vondráková - first_name: Roberta full_name: Filepová, Roberta last_name: Filepová - first_name: Jan full_name: Petrášek, Jan last_name: Petrášek - first_name: Jiří full_name: Friml, Jiří id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 - first_name: Hong-Wei full_name: Xue, Hong-Wei last_name: Xue citation: ama: Tan S, Zhang X, Kong W, et al. The lipid code-dependent phosphoswitch PDK1–D6PK activates PIN-mediated auxin efflux in Arabidopsis. Nature Plants. 2020;6:556-569. doi:10.1038/s41477-020-0648-9 apa: Tan, S., Zhang, X., Kong, W., Yang, X.-L., Molnar, G., Vondráková, Z., … Xue, H.-W. (2020). The lipid code-dependent phosphoswitch PDK1–D6PK activates PIN-mediated auxin efflux in Arabidopsis. Nature Plants. Springer Nature. https://doi.org/10.1038/s41477-020-0648-9 chicago: Tan, Shutang, Xixi Zhang, Wei Kong, Xiao-Li Yang, Gergely Molnar, Zuzana Vondráková, Roberta Filepová, Jan Petrášek, Jiří Friml, and Hong-Wei Xue. “The Lipid Code-Dependent Phosphoswitch PDK1–D6PK Activates PIN-Mediated Auxin Efflux in Arabidopsis.” Nature Plants. Springer Nature, 2020. https://doi.org/10.1038/s41477-020-0648-9. ieee: S. Tan et al., “The lipid code-dependent phosphoswitch PDK1–D6PK activates PIN-mediated auxin efflux in Arabidopsis,” Nature Plants, vol. 6. Springer Nature, pp. 556–569, 2020. ista: Tan S, Zhang X, Kong W, Yang X-L, Molnar G, Vondráková Z, Filepová R, Petrášek J, Friml J, Xue H-W. 2020. The lipid code-dependent phosphoswitch PDK1–D6PK activates PIN-mediated auxin efflux in Arabidopsis. Nature Plants. 6, 556–569. mla: Tan, Shutang, et al. “The Lipid Code-Dependent Phosphoswitch PDK1–D6PK Activates PIN-Mediated Auxin Efflux in Arabidopsis.” Nature Plants, vol. 6, Springer Nature, 2020, pp. 556–69, doi:10.1038/s41477-020-0648-9. short: S. Tan, X. Zhang, W. Kong, X.-L. Yang, G. Molnar, Z. Vondráková, R. Filepová, J. Petrášek, J. Friml, H.-W. Xue, Nature Plants 6 (2020) 556–569. date_created: 2020-03-21T16:34:16Z date_published: 2020-05-01T00:00:00Z date_updated: 2023-08-18T07:05:57Z day: '01' department: - _id: JiFr doi: 10.1038/s41477-020-0648-9 ec_funded: 1 external_id: isi: - '000531787500006' pmid: - '32393881' intvolume: ' 6' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1101/755504 month: '05' oa: 1 oa_version: Preprint page: 556-569 pmid: 1 project: - _id: 261099A6-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '742985' name: Tracing Evolution of Auxin Transport and Polarity in Plants - _id: 256FEF10-B435-11E9-9278-68D0E5697425 grant_number: 723-2015 name: Long Term Fellowship publication: Nature Plants publication_identifier: eissn: - '20550278' publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: link: - relation: erratum url: https://doi.org/10.1038/s41477-020-0719-y scopus_import: '1' status: public title: The lipid code-dependent phosphoswitch PDK1–D6PK activates PIN-mediated auxin efflux in Arabidopsis type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 6 year: '2020' ...