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Open Access

SNAREs SYP121 and SYP122 Mediate the Secretion of Distinct Cargo Subsets

Sakharam Waghmare, Edita Lileikyte, Rucha Karnik, Jennifer K. Goodman, Michael R. Blatt, Alexandra M.E. Jones
Sakharam Waghmare
Laboratory of Plant Physiology and Biophysics, University of Glasgow, Glasgow G12 8QQ, United Kingdom
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  • ORCID record for Sakharam Waghmare
Edita Lileikyte
Laboratory of Plant Physiology and Biophysics, University of Glasgow, Glasgow G12 8QQ, United Kingdom
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  • ORCID record for Edita Lileikyte
Rucha Karnik
Laboratory of Plant Physiology and Biophysics, University of Glasgow, Glasgow G12 8QQ, United Kingdom
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Jennifer K. Goodman
School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
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Michael R. Blatt
Laboratory of Plant Physiology and Biophysics, University of Glasgow, Glasgow G12 8QQ, United Kingdom
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Alexandra M.E. Jones
School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
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  • ORCID record for Alexandra M.E. Jones
  • For correspondence: alex.jones@warwick.ac.uk

Published December 2018. DOI: https://doi.org/10.1104/pp.18.00832

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  • © 2018 American Society of Plant Biologists. All Rights Reserved.

Abstract

SNARE (soluble N-ethylmaleimide-sensitive factor attachment protein receptor) proteins drive vesicle fusion and contribute to homoeostasis, pathogen defense, cell expansion, and growth in plants. In Arabidopsis (Arabidopsis thaliana), two homologous Qa-SNAREs, SYNTAXIN OF PLANTS121 (SYP121) and SYP122, facilitate the majority of secretory traffic to the plasma membrane, and the single mutants are indistinguishable from wild-type plants in the absence of stress, implying a redundancy in their functions. Nonetheless, several studies suggest differences among the secretory cargo of these SNAREs. To address this issue, we conducted an analysis of the proteins secreted by cultured wild-type, syp121, and syp122 mutant Arabidopsis seedlings. Here, we report that a number of cargo proteins were associated differentially with traffic mediated by SYP121 and SYP122. The data also indicated important overlaps between the SNAREs. Therefore, we conclude that the two Qa-SNAREs mediate distinct but complementary secretory pathways during vegetative plant growth.

  • Received July 10, 2018.
  • Accepted September 29, 2018.
  • Published October 22, 2018.

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SNAREs SYP121 and SYP122 Mediate the Secretion of Distinct Cargo Subsets
Sakharam Waghmare, Edita Lileikyte, Rucha Karnik, Jennifer K. Goodman, Michael R. Blatt, Alexandra M.E. Jones
Plant Physiology Dec 2018, 178 (4) 1679-1688; DOI: 10.1104/pp.18.00832

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SNAREs SYP121 and SYP122 Mediate the Secretion of Distinct Cargo Subsets
Sakharam Waghmare, Edita Lileikyte, Rucha Karnik, Jennifer K. Goodman, Michael R. Blatt, Alexandra M.E. Jones
Plant Physiology Dec 2018, 178 (4) 1679-1688; DOI: 10.1104/pp.18.00832
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Plant Physiology: 178 (4)
Plant Physiology
Vol. 178, Issue 4
Dec 2018
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