A symbiosis-dedicated SYNTAXIN OF PLANTS 13II isoform controls the formation of a stable host-microbe interface in symbiosis.
Identifieur interne : 001093 ( Main/Corpus ); précédent : 001092; suivant : 001094A symbiosis-dedicated SYNTAXIN OF PLANTS 13II isoform controls the formation of a stable host-microbe interface in symbiosis.
Auteurs : Rik Huisman ; Jan Hontelez ; Kirankumar S. Mysore ; Jiangqi Wen ; Ton Bisseling ; Erik LimpensSource :
- The New phytologist [ 1469-8137 ] ; 2016.
English descriptors
- KwdEn :
- Alternative Splicing (genetics), Amino Acid Sequence (MeSH), Medicago truncatula (microbiology), Mycorrhizae (cytology), Mycorrhizae (physiology), Phylogeny (MeSH), Plant Proteins (chemistry), Plant Proteins (metabolism), Protein Isoforms (chemistry), Protein Isoforms (metabolism), Protein Transport (MeSH), Rhizobium (physiology), SNARE Proteins (metabolism), Subcellular Fractions (metabolism), Symbiosis (MeSH).
- MESH :
- chemical , chemistry : Plant Proteins, Protein Isoforms.
- cytology : Mycorrhizae.
- genetics : Alternative Splicing.
- chemical , metabolism : Plant Proteins, Protein Isoforms, SNARE Proteins, Subcellular Fractions.
- microbiology : Medicago truncatula.
- physiology : Mycorrhizae, Rhizobium.
- Amino Acid Sequence, Phylogeny, Protein Transport, Symbiosis.
Abstract
Arbuscular mycorrhizal (AM) fungi and rhizobium bacteria are accommodated in specialized membrane compartments that form a host-microbe interface. To better understand how these interfaces are made, we studied the regulation of exocytosis during interface formation. We used a phylogenetic approach to identify target soluble N-ethylmaleimide-sensitive factor-attachment protein receptors (t-SNAREs) that are dedicated to symbiosis and used cell-specific expression analysis together with protein localization to identify t-SNAREs that are present on the host-microbe interface in Medicago truncatula. We investigated the role of these t-SNAREs during the formation of a host-microbe interface. We showed that multiple syntaxins are present on the peri-arbuscular membrane. From these, we identified SYNTAXIN OF PLANTS 13II (SYP13II) as a t-SNARE that is essential for the formation of a stable symbiotic interface in both AM and rhizobium symbiosis. In most dicot plants, the SYP13II transcript is alternatively spliced, resulting in two isoforms, SYP13IIα and SYP13IIβ. These splice-forms differentially mark functional and degrading arbuscule branches. Our results show that vesicle traffic to the symbiotic interface is specialized and required for its maintenance. Alternative splicing of SYP13II allows plants to replace a t-SNARE involved in traffic to the plasma membrane with a t-SNARE that is more stringent in its localization to functional arbuscules.
DOI: 10.1111/nph.13973
PubMed: 27110912
Links to Exploration step
pubmed:27110912Le document en format XML
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<term>Mycorrhizae (cytology)</term>
<term>Mycorrhizae (physiology)</term>
<term>Phylogeny (MeSH)</term>
<term>Plant Proteins (chemistry)</term>
<term>Plant Proteins (metabolism)</term>
<term>Protein Isoforms (chemistry)</term>
<term>Protein Isoforms (metabolism)</term>
<term>Protein Transport (MeSH)</term>
<term>Rhizobium (physiology)</term>
<term>SNARE Proteins (metabolism)</term>
<term>Subcellular Fractions (metabolism)</term>
<term>Symbiosis (MeSH)</term>
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<keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Plant Proteins</term>
<term>Protein Isoforms</term>
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<term>Protein Isoforms</term>
<term>SNARE Proteins</term>
<term>Subcellular Fractions</term>
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<keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Mycorrhizae</term>
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<term>Phylogeny</term>
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<front><div type="abstract" xml:lang="en">Arbuscular mycorrhizal (AM) fungi and rhizobium bacteria are accommodated in specialized membrane compartments that form a host-microbe interface. To better understand how these interfaces are made, we studied the regulation of exocytosis during interface formation. We used a phylogenetic approach to identify target soluble N-ethylmaleimide-sensitive factor-attachment protein receptors (t-SNAREs) that are dedicated to symbiosis and used cell-specific expression analysis together with protein localization to identify t-SNAREs that are present on the host-microbe interface in Medicago truncatula. We investigated the role of these t-SNAREs during the formation of a host-microbe interface. We showed that multiple syntaxins are present on the peri-arbuscular membrane. From these, we identified SYNTAXIN OF PLANTS 13II (SYP13II) as a t-SNARE that is essential for the formation of a stable symbiotic interface in both AM and rhizobium symbiosis. In most dicot plants, the SYP13II transcript is alternatively spliced, resulting in two isoforms, SYP13IIα and SYP13IIβ. These splice-forms differentially mark functional and degrading arbuscule branches. Our results show that vesicle traffic to the symbiotic interface is specialized and required for its maintenance. Alternative splicing of SYP13II allows plants to replace a t-SNARE involved in traffic to the plasma membrane with a t-SNARE that is more stringent in its localization to functional arbuscules.</div>
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<Abstract><AbstractText>Arbuscular mycorrhizal (AM) fungi and rhizobium bacteria are accommodated in specialized membrane compartments that form a host-microbe interface. To better understand how these interfaces are made, we studied the regulation of exocytosis during interface formation. We used a phylogenetic approach to identify target soluble N-ethylmaleimide-sensitive factor-attachment protein receptors (t-SNAREs) that are dedicated to symbiosis and used cell-specific expression analysis together with protein localization to identify t-SNAREs that are present on the host-microbe interface in Medicago truncatula. We investigated the role of these t-SNAREs during the formation of a host-microbe interface. We showed that multiple syntaxins are present on the peri-arbuscular membrane. From these, we identified SYNTAXIN OF PLANTS 13II (SYP13II) as a t-SNARE that is essential for the formation of a stable symbiotic interface in both AM and rhizobium symbiosis. In most dicot plants, the SYP13II transcript is alternatively spliced, resulting in two isoforms, SYP13IIα and SYP13IIβ. These splice-forms differentially mark functional and degrading arbuscule branches. Our results show that vesicle traffic to the symbiotic interface is specialized and required for its maintenance. Alternative splicing of SYP13II allows plants to replace a t-SNARE involved in traffic to the plasma membrane with a t-SNARE that is more stringent in its localization to functional arbuscules.</AbstractText>
<CopyrightInformation>© 2016 The Authors. New Phytologist © 2016 New Phytologist Trust.</CopyrightInformation>
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