SLAH3-type anion channel expressed in poplar secretory epithelia operates in calcium kinase CPK-autonomous manner

© 2016 The Authors. New Phytologist © 2016 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 210(2016), 3 vom: 02. Mai, Seite 922-33
1. Verfasser: Jaborsky, Mario (VerfasserIn)
Weitere Verfasser: Maierhofer, Tobias, Olbrich, Andrea, Escalante-Pérez, María, Müller, Heike M, Simon, Judy, Krol, Elzbieta, Cuin, Tracey Ann, Fromm, Jörg, Ache, Peter, Geiger, Dietmar, Hedrich, Rainer
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2016
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't S-type anion channels SLAC/SLAH anion channels extrafloral nectaries poplar transepithelial transport Anions Ion Channels mehr... Nitrates Plant Nectar Plant Proteins Recombinant Fusion Proteins Protein Kinases EC 2.7.-
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100 1 |a Jaborsky, Mario  |e verfasserin  |4 aut 
245 1 0 |a SLAH3-type anion channel expressed in poplar secretory epithelia operates in calcium kinase CPK-autonomous manner 
264 1 |c 2016 
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500 |a Date Revised 30.09.2020 
500 |a published: Print-Electronic 
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520 |a Extrafloral nectaries secrete a sweet sugar cocktail that lures predator insects for protection from foraging herbivores. Apart from sugars and amino acids, the nectar contains the anions chloride and nitrate. Recent studies with Populus have identified a type of nectary covered by apical bipolar epidermal cells, reminiscent of the secretory brush border epithelium in animals. Border epithelia operate transepithelial anion transport, which is required for membrane potential and/or osmotic adjustment of the secretory cells. In search of anion transporters expressed in extrafloral nectaries, we identified PttSLAH3 (Populus tremula × Populus tremuloides SLAC1 Homologue3), an anion channel of the SLAC/SLAH family. When expressed in Xenopus oocytes, PttSLAH3 displayed the features of a voltage-dependent anion channel, permeable to both nitrate and chloride. In contrast to the Arabidopsis SLAC/SLAH family members, the poplar isoform PttSLAH3 is independent of phosphorylation activation by protein kinases. To understand the basis for the autonomous activity of the poplar SLAH3, we generated and expressed chimera between kinase-independent PttSLAH3 and kinase-dependent Arabidopsis AtSLAH3. We identified the N-terminal tail and, to a lesser extent, the C-terminal tail as responsible for PttSLAH3 kinase-(in)dependent action. This feature of PttSLAH3 may provide the secretory cell with a channel probably controlling long-term nectar secretion 
650 4 |a Journal Article 
650 4 |a Research Support, Non-U.S. Gov't 
650 4 |a S-type anion channels 
650 4 |a SLAC/SLAH 
650 4 |a anion channels 
650 4 |a extrafloral nectaries 
650 4 |a poplar 
650 4 |a transepithelial transport 
650 7 |a Anions  |2 NLM 
650 7 |a Ion Channels  |2 NLM 
650 7 |a Nitrates  |2 NLM 
650 7 |a Plant Nectar  |2 NLM 
650 7 |a Plant Proteins  |2 NLM 
650 7 |a Recombinant Fusion Proteins  |2 NLM 
650 7 |a Protein Kinases  |2 NLM 
650 7 |a EC 2.7.-  |2 NLM 
700 1 |a Maierhofer, Tobias  |e verfasserin  |4 aut 
700 1 |a Olbrich, Andrea  |e verfasserin  |4 aut 
700 1 |a Escalante-Pérez, María  |e verfasserin  |4 aut 
700 1 |a Müller, Heike M  |e verfasserin  |4 aut 
700 1 |a Simon, Judy  |e verfasserin  |4 aut 
700 1 |a Krol, Elzbieta  |e verfasserin  |4 aut 
700 1 |a Cuin, Tracey Ann  |e verfasserin  |4 aut 
700 1 |a Fromm, Jörg  |e verfasserin  |4 aut 
700 1 |a Ache, Peter  |e verfasserin  |4 aut 
700 1 |a Geiger, Dietmar  |e verfasserin  |4 aut 
700 1 |a Hedrich, Rainer  |e verfasserin  |4 aut 
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773 1 8 |g volume:210  |g year:2016  |g number:3  |g day:02  |g month:05  |g pages:922-33 
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