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Vogel K, Bläske T, Nagel MK, Globisch C, Maguire S, Mattes L, Gude C, Kovermann M, Hauser K, Peter C, Isono E. Lipid-mediated activation of plasma membrane-localized deubiquitylating enzymes modulate endosomal trafficking. Nat Commun 2022; 13:6897. [PMID: 36371501 PMCID: PMC9653390 DOI: 10.1038/s41467-022-34637-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 11/01/2022] [Indexed: 11/13/2022] Open
Abstract
The abundance of plasma membrane-resident receptors and transporters has to be tightly regulated by ubiquitin-mediated endosomal degradation for the proper coordination of environmental stimuli and intracellular signaling. Arabidopsis OVARIAN TUMOR PROTEASE (OTU) 11 and OTU12 are plasma membrane-localized deubiquitylating enzymes (DUBs) that bind to phospholipids through a polybasic motif in the OTU domain. Here we show that the DUB activity of OTU11 and OTU12 towards K63-linked ubiquitin is stimulated by binding to lipid membranes containing anionic lipids. In addition, we show that the DUB activity of OTU11 against K6- and K11-linkages is also stimulated by anionic lipids, and that OTU11 and OTU12 can modulate the endosomal degradation of a model cargo and the auxin efflux transporter PIN2-GFP in vivo. Our results suggest that the catalytic activity of OTU11 and OTU12 is tightly connected to their ability to bind membranes and that OTU11 and OTU12 are involved in the fine-tuning of plasma membrane proteins in Arabidopsis.
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Affiliation(s)
- Karin Vogel
- grid.9811.10000 0001 0658 7699Plant Physiology and Biochemistry, Department of Biology, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany
| | - Tobias Bläske
- grid.9811.10000 0001 0658 7699Plant Physiology and Biochemistry, Department of Biology, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany
| | - Marie-Kristin Nagel
- grid.9811.10000 0001 0658 7699Plant Physiology and Biochemistry, Department of Biology, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany
| | - Christoph Globisch
- grid.9811.10000 0001 0658 7699Computational and Theoretical Chemistry, Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany
| | - Shane Maguire
- grid.9811.10000 0001 0658 7699Biophysical Chemistry, Department of Chemistry, University of Konstanz, Universitätsstraße 10, D-78464 Konstanz, Germany
| | - Lorenz Mattes
- grid.9811.10000 0001 0658 7699Biophysical Chemistry, Department of Chemistry, University of Konstanz, Universitätsstraße 10, D-78464 Konstanz, Germany
| | - Christian Gude
- grid.6936.a0000000123222966School of Life Sciences, Technical University of Munich, 85354 Freising, Germany
| | - Michael Kovermann
- grid.9811.10000 0001 0658 7699NMR, Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany
| | - Karin Hauser
- grid.9811.10000 0001 0658 7699Biophysical Chemistry, Department of Chemistry, University of Konstanz, Universitätsstraße 10, D-78464 Konstanz, Germany
| | - Christine Peter
- grid.9811.10000 0001 0658 7699Computational and Theoretical Chemistry, Department of Chemistry, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany
| | - Erika Isono
- grid.9811.10000 0001 0658 7699Plant Physiology and Biochemistry, Department of Biology, University of Konstanz, Universitätsstraße 10, 78464 Konstanz, Germany
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Ma YY, Meng Q, Tan XM, Yang L, Zhang KL, Xu ZQ. Functional identification of the different regions in B-class floral homeotic MADS-box proteins IiAP3 and IiPI from Isatis indigotica. PHYSIOLOGIA PLANTARUM 2022; 174:e13713. [PMID: 35561122 DOI: 10.1111/ppl.13713] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 05/03/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
APETALA3 (AP3) and PISTILLATA (PI) are B-class MADS-box floral homeotic genes of Arabidopsis and are involved in specifying the identity of petals and stamens. In the present work, IiAP3 and IiPI, the respective orthologous genes of AP3 and PI, were cloned from Isatis indigotica. By expressing in ap3-6 and pi-1 homozygous mutant and in wild-type Arabidopsis under the control of AP3 promoter or CaMV 35S promoter, we demonstrated that IiAP3 and IiPI were functionally equivalent to AP3 and PI of Arabidopsis. Referring to previous reports and the research results in the present work, expression patterns of AP3 and PI homologs are not the same in different angiosperms possessing diverse floral structures. It suggests that the alterations in expression may contribute to the changing morphology of flowers. To further determine the relationship between IiAP3 and IiPI, the coding sequences of the different structural regions in these two proteins were swapped with each other, and the data collected from transgenic Arabidopsis plants of the chimeric constructs suggested that MADS domain was irreplaceable for the function of IiAP3, K domain of IiAP3 was involved in specifying the identity of stamens, K domain of IiPI was mainly related to the formation of petals, and C-terminal region of IiPI was involved in characterization of stamens. In addition, a complete KC region of these two proteins was more effective in phenotypic complementation of the mutants.
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Affiliation(s)
- Ye-Ye Ma
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), Shaanxi Provincial Key Laboratory of Biotechnology, College of Life Sciences, Northwest University, Xi'an, People's Republic of China
| | - Qi Meng
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), Shaanxi Provincial Key Laboratory of Biotechnology, College of Life Sciences, Northwest University, Xi'an, People's Republic of China
| | - Xiao-Min Tan
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), Shaanxi Provincial Key Laboratory of Biotechnology, College of Life Sciences, Northwest University, Xi'an, People's Republic of China
| | - Liu Yang
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), Shaanxi Provincial Key Laboratory of Biotechnology, College of Life Sciences, Northwest University, Xi'an, People's Republic of China
| | - Kai-Li Zhang
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), Shaanxi Provincial Key Laboratory of Biotechnology, College of Life Sciences, Northwest University, Xi'an, People's Republic of China
| | - Zi-Qin Xu
- Key Laboratory of Resource Biology and Biotechnology in Western China (Ministry of Education), Shaanxi Provincial Key Laboratory of Biotechnology, College of Life Sciences, Northwest University, Xi'an, People's Republic of China
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