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Heteromerization of Arabidopsis Kv channel alpha-subunits : Data and prospects.

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Jeanguenin, Linda [] Lebaudy, Anne [] Xicluna, Jérôme [] Alcon, Carine [] Hosy, Eric [] Duby , Geoffrey [UCL] Thibaud, Jean-Baptiste []

Potassium translocation in plants is accomplished by a large variety of transport systems. Most of the available molecular information on these proteins concerns voltage-gated potassium channels (Kv channels). The Arabidopsis genome comprises nine genes encoding alpha-subunits of Kv channels. Based on knowledge of their animal homologues, and on biochemical investigations, it is broadly admitted that four such polypeptides must assemble to yield a functional Kv channel. The intrinsic functional properties of Kv channel alpha-subunits have been described by expressing them in suitable heterologous contexts where homo-tetrameric channels could be characterized. However, due to the high similarity of both the polypeptidic sequence and the structural scheme of Kv channel alpha-subunits, formation of heteromeric Kv channels by at least two types of alpha-subunits is conceivable. Several examples of such heteromeric plant Kv channels have been studied in heterologous expression systems and evidence that heteromerization actually occurs in planta has now been published. It is therefore challenging to uncover the physiological role of this heteromerization. Fine tuning of Kv channels by heteromerisation could be relevant not only to potassium transport but also to electrical signaling within the plant.

Document type Article de périodique (Journal article) – Article de recherche – Journal Article
Access type Accès libre
Publication date 2008
Language Anglais
Journal information "Plant signaling & behavior" - Vol. 3, no. 9, p. 622-625 (2008)
Peer reviewed yes
Publisher Society of Plant Signaling and Behavior
issn 1559-2316
Publication status Publié
Affiliations UCL - SST/ISV - Institut des sciences de la vie
UCL - SST/LIBST - Louvain Institute of Biomolecular Science and Technology
Keywords 3100
Links
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Bibliographic reference Jeanguenin, Linda ; Lebaudy, Anne ; Xicluna, Jérôme ; Alcon, Carine ; Hosy, Eric ; et. al. Heteromerization of Arabidopsis Kv channel alpha-subunits : Data and prospects.. In: Plant signaling & behavior, Vol. 3, no. 9, p. 622-625 (2008)
Permanent URL http://hdl.handle.net/2078.1/80256