Vacuolar H+/Ca2+ transport: who's directing the traffic?
Physiological studies have established the role of plant high-capacity vacuolar H+/Ca2+ exchange activity in ion homeostasis and signal transduction. The molecular characterization and structure-function analyses of these transporters are just beginning to emerge. In yeast, Ca2+ signaling molecules regulate vacuolar H+/Ca2+ exchange. Recently, some of the Ca2+ dependent "molecular relay" molecules have been characterized in plants; however, the regulation of plant vacuolar H+/Ca2+ exchange remains an open question.
Baylor College of Medicine, Plant Physiology Group, Dept of Pediatrics, US Dept of Agriculture/Agricultural Research Service, Children's Nutrition Research Center, 1100 Bates St, Houston, TX 77030, USA. kendalh@bcm.tmc.edu
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Hirschi
D002118:Calcium / Q000378:metabolism*; D002352:Carrier Proteins / Q000378:metabolism; D015870:Gene Expression; D017343:Genes, Plant; D006859:Hydrogen / Q000378:metabolism*; D017136:Ion Transport; D014617:Vacuoles / Q000378:metabolism*
D002352:Carrier Proteins; D006859:Hydrogen; D002118:Calcium