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中国细胞生物学学会第九次会员代表大会暨青年学术大会

作者： Tomoo Shimada Hideyuki Takahashi Mikio nishimura ikuko hara.nishimura Graduate School of Science Kyoto UniversitySakyo-kuKyoto 606-8502Japan Department of Cell Biology National Institute for Basic BiologyOkazaki 444-8585Japan

In higher plants,seed storage proteins are synthesized on the ER as precursors and then are transported to protein storage vacuoles,where they are processed into mature *** isolated two Arabidopsis thaliana mutants, m... 详细信息

关键词： vesicle traffic protein transport organelle ER storage proteins

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BEACH-Domain Proteins Act Together in a Cascade to Mediate Vacuolar Protein Trafficking and Disease Resistance in Arabidopsis

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Molecular Plant 2015年第3期8卷 389-398页

作者： Ooi-kock Teh Noriyuki Hatsugai Kentaro Tamura Kentaro Fuji Ryo Tabata Katsushi Yamaguch Shuji Shingenobu Masashi Yamada Mitsuyasu Hasebe Shinichiro Sawa Tomoo Shimada ikuko hara.nishimura Graduate School of Science Kyoto University Sakyo-ku Kyoto 606-8502 Japan Research Centre for Cooperative Projects Hokkaido University Kita-ku Sapporo 060-8638 Japan Graduate School of Science and Technology Kumamoto University Kumamoto 860-8555 Japan Functional Genomics Facility National Institute for Basic Biology Okazaki 444-8585 Japan Department of Biology and IGSP Center for Systems Biology Duke University Durham NC 27708 USA Division of Evolutionary Biology National Institute for Basic Biology Okazaki 444-8585 Japan School of Life Science The Graduate University for Advanced Studies Okazaki 444-8585 Japan Present address: Department of Plant Biology and Forest Genetics Uppsala BioCenter Swedish University of Agricultural Sciences (SLU) and Linnean Centre ofPlant Biology Uppsala SE-75007 Sweden present address: Microbial and Plant Genomics Institute University of Minnesota St Paul MN 55108 USA Present address: RIKEN Innovation Center RIKEN 2-1 Hirosawa Wako Saitama 351-0198 Japan

Membrane trafficking to the protein storage vacuole （PSV） is a specialized process in seed plants. However, this trafficking mechanism to PSV is poorly understood. Here, we show that three types of Beige and Chediak-Higashi （BEACH）-domain proteins contribute to both vacuolar protein transport and effector- triggered immunity （ETI）. We screened a green fluorescent seed （GFS） library of Arabidopsis mutants with defects in vesicle trafficking and isolated two allelic mutants gfs3 and gfs12 with a defect in seed pro- tein transport to PSV. The gene responsible for the mutant phenotype was found to encode a putative pro- tein belonging to group D of BEACH-domain proteins, which possess kinase domains. Disruption of other BEACH-encoding loci in the gfs12 mutant showed that BEACH homologs acted in a cascading manner for PSV trafficking. The epistatic genetic interactions observed among BEACH homologs were also found in the ETI responses of the gfs12 and gfs12 bchb-1 mutants, which showed elevated avirulent bacterial growth. The GFS12 kinase domain interacted specifically with the pleckstrin homology domain of BchCl. These results suggest that a cascade of multiple BEACH-domain proteins contributes to vacuolar protein transport and plant defense.

关键词： BEACH-domain protein Arabidopsis thaliana vacuolar protein transport protein storage vacuoles,plant immunity

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