Maize black Mexican sweet suspension cultured cells are a convenient tool for studying aquaporin activity and regulation

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Abstract

Aquaporins (AQPs) are channel proteins that facilitate and regulate the permeation of water across biological membranes. Black mMexican sweet suspension cultured cells are a convenient model for studying the regulation of maize AQP expression and activity. Among other advantages, a single cell system allows the contribution of plasma membrane AQPs (PIPs, plasma membrane intrinsic proteins) to the membrane water permeability coefficient (Pf) to be determined using biophysical measurement methods, such as the cell pressure probe or protoplast swelling assay. We generated a transgenic cell culture line expressing a tagged version of ZmPIP2;6 and used this material to demonstrate that the ZmPIP2;6 and ZmPIP2;1 isoforms physically interact. This kind of interaction could be an additional mechanism for regulating membrane water permeability by acting on the activity and/or trafficking of PIP hetero-oligomers. © 2009 Landes Bioscience.

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Cavez, D., Hachez, C., & Chaumont, F. (2009). Maize black Mexican sweet suspension cultured cells are a convenient tool for studying aquaporin activity and regulation. Plant Signaling and Behavior, 4(9), 890–892. https://doi.org/10.4161/psb.4.9.9484

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