[Demonstration of 2 phosphate transport systems in Candida tropicalis].
Candida tropicalis has two phosphate transport systems, one of which is constitutive and has a low affinity for its substrate (Kmapp 1.2.10(-3) M). The other one characterized by a high affinity for H2PO4- (Kmapp = 4.5.10(-6) M) appears only under phosphate starvation conditions. The regulation of the latter would act on the one hand on the synthesis of binding proteins for P1 (repression-derepression) and on the other on the activation or inactivation of the carriers.
D001665:Binding Sites; D001693:Biological Transport, Active / Q000187:drug effects; D002175:Candida / Q000378:metabolism*; D002352:Carrier Proteins; D003513:Cycloheximide / Q000494:pharmacology; D004789:Enzyme Activation; D004791:Enzyme Inhibitors / Q000494:pharmacology; D004794:Enzyme Repression; D007700:Kinetics; D010710:Phosphates / Q000378:metabolism*; D013997:Time Factors
D002352:Carrier Proteins; D004791:Enzyme Inhibitors; D010710:Phosphates; D003513:Cycloheximide
Mise en évidence de deux systèmes de transport du phosphate chez Candida tropicalis