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MTV proteins unveil ER- and microtubule-associated compartments in the plant vacuolar trafficking pathway
MO. Delgadillo, G. Ruano, J. Zouhar, M. Sauer, J. Shen, A. Lazarova, M. Sanmartín, LTF. Lai, C. Deng, P. Wang, PJ. Hussey, JJ. Sánchez-Serrano, L. Jiang, E. Rojo,
Language English Country United States
Document type Journal Article, Research Support, Non-U.S. Gov't
NLK
Free Medical Journals
from 1915 to 6 months ago
Freely Accessible Science Journals
from 1915 to 6 months ago
PubMed Central
from 1915 to 6 months ago
Europe PubMed Central
from 1915 to 6 months ago
Open Access Digital Library
from 1915-01-15
Open Access Digital Library
from 1915-01-01
- MeSH
- Alleles MeSH
- Arabidopsis genetics metabolism MeSH
- Cytoplasmic Vesicles genetics metabolism MeSH
- Endoplasmic Reticulum genetics metabolism MeSH
- Golgi Apparatus genetics metabolism MeSH
- Kinesins genetics metabolism MeSH
- Microtubules genetics metabolism MeSH
- Multivesicular Bodies genetics metabolism MeSH
- Mutation MeSH
- Arabidopsis Proteins genetics metabolism MeSH
- Protein Transport genetics MeSH
- Vacuoles genetics metabolism MeSH
- Vesicular Transport Proteins genetics metabolism MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
The factors and mechanisms involved in vacuolar transport in plants, and in particular those directing vesicles to their target endomembrane compartment, remain largely unknown. To identify components of the vacuolar trafficking machinery, we searched for Arabidopsis modified transport to the vacuole (mtv) mutants that abnormally secrete the synthetic vacuolar cargo VAC2. We report here on the identification of 17 mtv mutations, corresponding to mutant alleles of MTV2/VSR4, MTV3/PTEN2A MTV7/EREL1, MTV8/ARFC1, MTV9/PUF2, MTV10/VPS3, MTV11/VPS15, MTV12/GRV2, MTV14/GFS10, MTV15/BET11, MTV16/VPS51, MTV17/VPS54, and MTV18/VSR1 Eight of the MTV proteins localize at the interface between the trans-Golgi network (TGN) and the multivesicular bodies (MVBs), supporting that the trafficking step between these compartments is essential for segregating vacuolar proteins from those destined for secretion. Importantly, the GARP tethering complex subunits MTV16/VPS51 and MTV17/VPS54 were found at endoplasmic reticulum (ER)- and microtubule-associated compartments (EMACs). Moreover, MTV16/VPS51 interacts with the motor domain of kinesins, suggesting that, in addition to tethering vesicles, the GARP complex may regulate the motors that transport them. Our findings unveil a previously uncharacterized compartment of the plant vacuolar trafficking pathway and support a role for microtubules and kinesins in GARP-dependent transport of soluble vacuolar cargo in plants.
Department of Biosciences Durham University Durham DH1 3LE United Kingdom
State Key Laboratory of Subtropical Silviculture Zhejiang A and F University Hangzhou 311300 China
References provided by Crossref.org
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- $a The factors and mechanisms involved in vacuolar transport in plants, and in particular those directing vesicles to their target endomembrane compartment, remain largely unknown. To identify components of the vacuolar trafficking machinery, we searched for Arabidopsis modified transport to the vacuole (mtv) mutants that abnormally secrete the synthetic vacuolar cargo VAC2. We report here on the identification of 17 mtv mutations, corresponding to mutant alleles of MTV2/VSR4, MTV3/PTEN2A MTV7/EREL1, MTV8/ARFC1, MTV9/PUF2, MTV10/VPS3, MTV11/VPS15, MTV12/GRV2, MTV14/GFS10, MTV15/BET11, MTV16/VPS51, MTV17/VPS54, and MTV18/VSR1 Eight of the MTV proteins localize at the interface between the trans-Golgi network (TGN) and the multivesicular bodies (MVBs), supporting that the trafficking step between these compartments is essential for segregating vacuolar proteins from those destined for secretion. Importantly, the GARP tethering complex subunits MTV16/VPS51 and MTV17/VPS54 were found at endoplasmic reticulum (ER)- and microtubule-associated compartments (EMACs). Moreover, MTV16/VPS51 interacts with the motor domain of kinesins, suggesting that, in addition to tethering vesicles, the GARP complex may regulate the motors that transport them. Our findings unveil a previously uncharacterized compartment of the plant vacuolar trafficking pathway and support a role for microtubules and kinesins in GARP-dependent transport of soluble vacuolar cargo in plants.
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