title: The plant Ca2+ -ATPase repertoire: biochemical features and physiological functions.
abstract: Ca(2+)-ATPases are P-type ATPases that use the energy of ATP hydrolysis to pump Ca(2+) from the cytoplasm into intracellular compartments or into the apoplast. Plant cells possess two types of Ca(2+) -pumping ATPase, named ECAs (for ER-type Ca(2+)-ATPase) and ACAs (for auto-inhibited Ca(2+)-ATPase). Each type comprises different isoforms, localised on different membranes. Here, we summarise available knowledge of the biochemical characteristics and the physiological role of plant Ca(2+)-ATPases, greatly improved after gene identification, which allows both biochemical analysis of single isoforms through heterologous expression in yeast and expression profiling and phenotypic analysis of single isoform knock-out mutants.
authors.affiliation: Dipartimento di Biologia L. Gorini, Università degli Studi di Milano, Istituto di Biofisica del CNR, Sezione di Milano, Milano, Italy.
authors.forename: M C
authors.initials: MC
authors.lastname: Bonza
authors.forename: M I
authors.initials: MI
authors.lastname: De Michelis
mesh_terms: D000252:Calcium-Transporting ATPases / Q000235:genetics / Q000378:metabolism*; D007527:Isoenzymes; D010944:Plants / Q000201:enzymology* / Q000235:genetics
chemical_list: D007527:Isoenzymes; D000252:Calcium-Transporting ATPases