Journal Title
Title of Journal: J Plant Res
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Abbravation: Journal of Plant Research
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Authors: Mariko Sunada Tatsuaki Goh Takashi Ueda Akihiko Nakano
Publish Date: 2015/10/22
Volume: 129, Issue: 1, Pages: 93-102
Abstract
Recent studies demonstrated that endosomal transport played important roles in various plant functions The RAB GTPase regulates the tethering and fusion steps of vesicle trafficking to target membranes in each trafficking pathway by acting as a molecular switch RAB GTPase activation is catalyzed by specific guanine nucleotide exchange factors GEFs that promote the exchange of GDP on the RAB GTPase with GTP RAB5 is a key regulator of endosomal trafficking and is uniquely diversified in plants the plantunique RAB5 group ARA6 was acquired in addition to conventional RAB5 during evolution In Arabidopsis thaliana conventional RAB5 ARA7 and RHA1 regulate the endosomal/vacuolar trafficking pathways whereas ARA6 acts in the pathway from the endosome to the plasma membrane Despite their distinct functions all RAB5 members are activated by the common GEF VACUOLAR PROTEIN SORTING 9a VPS9a VPS9a consists of an Nterminal conserved domain and Cterminal region CTR with no similarity to known functional domains In this study we investigated the function of the CTR by generating truncated versions of VPS9a and found that it was specifically responsible for ARA6 regulation moreover the CTR was required for the oligomerization and correct localization of VPS9a The oligomerization of VPS9a was mediated by a distinctive region consisting of 36 amino acids in the CTR that was conserved in plant RAB5 GEFs Thus the VPS9a CTR plays an important role in the regulation of the two RAB5 groups in plantsWe thank Dr T Nakagawa Shimane University Dr S Shimizu Tokyo Medical and Dental University and Dr T Demura NAIST for sharing materials and Dr K Ebine and Dr E Ito The University of Tokyo for critical reading of the manuscript This study was supported by the Ministry of Education Culture Sports Science and Technology of Japan AN and TU JST PRESTO TU and a GrantinAid for JSPS Fellows MS
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Other Papers In This Journal:
- Speciation process of Salvia isensis (Lamiaceae), a species endemic to serpentine areas in the Ise-Tokai district, Japan, from the viewpoint of the contradictory phylogenetic trees generated from chloroplast and nuclear DNA
- Extensive investigation of the sap flow of maize plants in an oasis farmland in the middle reach of the Heihe River, Northwest China
- miR156 modulates rhizosphere acidification in response to phosphate limitation in Arabidopsis
- Leaf-shape variation of Paederia foetida in Japan: reexamination of the small, narrow leaf form from Miyajima Island
- Transcriptional repression caused by Dof5.8 is involved in proper vein network formation in Arabidopsis thaliana leaves
- Double-stranded RNA-binding protein DRB3 negatively regulates anthocyanin biosynthesis by modulating PAP1 expression in Arabidopsis thaliana
- Transduction of pressure signal to electrical signal upon sudden increase in turgor pressure in Chara corallina
- Seasonal shift in factors controlling net ecosystem production in a high Arctic terrestrial ecosystem
- Methods of estimating seed banks with reference to long-term seed burial
- A study on calcium oxalate crystals in Tinantia anomala (Commelinaceae) with special reference to ultrastructural changes during anther development
- Isolation and characterization of seventy-nine full-length mariner -like transposase genes in the Bambusoideae subfamily
- The anatomy of the chi-chi of Ginkgo biloba suggests a mode of elongation growth that is an alternative to growth driven by an apical meristem
- Temporal variation in leaf nitrogen partitioning of a broad-leaved evergreen tree, Quercus myrsinaefolia
- Exosomes versus microexosomes: Shared components but distinct functions
- Signaling mechanisms of plant cryptochromes in Arabidopsis thaliana
- Endophytic colonization of barley ( Hordeum vulgare ) roots by the nematophagous fungus Pochonia chlamydosporia reveals plant growth promotion and a general defense and stress transcriptomic response
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- Embryology of Pera (Peraceae, Malpighiales): systematics and evolutionary implications
- An inverse relationship between allelopathic activity and salt tolerance in suspension cultures of three mangrove species, Sonneratia alba , S. caseolaris and S. ovata : development of a bioassay method for allelopathy, the protoplast co-culture method
- Dynamic intracellular reorganization of cytoskeletons and the vacuole in defense responses and hypersensitive cell death in plants
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