title: Inorganic phosphate as an important regulator of phosphatases.
abstract: Cellular metabolism depends on the appropriate concentration of intracellular inorganic phosphate (Pi). Pi starvation-responsive genes appear to be involved in multiple metabolic pathways, implying a complex Pi regulation system in microorganisms and plants. A group of enzymes is required for absorption and maintenance of adequate phosphate levels, which is released from phosphate esters and anhydrides. The phosphatase system is particularly suited for the study of regulatory mechanisms because phosphatase activity is easily measured using specific methods and the difference between the repressed and derepressed levels of phosphatase activity is easily detected. This paper analyzes the protein phosphatase system induced during phosphate starvation in different organisms.
authors.affiliation: Instituto de Microbiologia Professor Paulo de Góes, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Cidade Universitária, Ilha do Fundão, 21941-590 Rio de Janeiro, RJ, Brazil.
authors.forename: Claudia Fernanda
authors.initials: CF
authors.lastname: Dick
authors.forename: André Luiz Araújo
authors.initials: AL
authors.lastname: Dos-Santos
authors.forename: José Roberto
authors.initials: JR
authors.lastname: Meyer-Fernandes