The kinetics of the active and de-energized transport of O-methyl glucose in Ustilago maydis

Central venous catheter infection associated with Pseudozyma aphidis in a child with short gut syndrome

“…Both had CVCs and received chronic parenteral nutrition as well as suffering from multiple CVC infections. Since Ustilago species and Pseudozyma species are associated with corn in the environment (Martinez-Espinoza et al, 2002;Miller & Harun, 1978), dietary history is important while evaluating patients with invasive disease caused by these yeasts. There was no unusual exposure to corn in the adult patient.…”

Characteristics of glucose uptake by glucose- and NH4-limited grown Penicillium ochrochloron at low, medium and high glucose concentration

“…Such biphasic plots can have different reasons, for instance: the presence of one carrier plus a first order process (Fuhrmann and Völker, 1993;Maier et al, 2002), the presence of more than one carrier (Coons et al, 1995), a change in the kinetic parameters of a carrier caused by membrane energization (Miller and Harun, 1978) or ligand binding (Sanders, 1986), an inhibition of glucose uptake by glucose-6-phosphate (Rizzi et al, 1996), or the distribution of the transported substance between more than one subcellular compartments (Slayman et al, 1994).…”

“…From discussions with Stein (1986) and Van Winkle (1999) the hypothesis emerged that the missing decrease in glucose uptake rate at [S] < 1 mM could possibly be caused by a metabolic adaptation. Conceivable would be a decrease in K S (Miller and Harun, 1978;Walsh et al, 1994) or an increase in the number of carrier molecules. In any case, we take this result as an indication that glucose uptake is controlled to a higher degree by metabolism than by transport itself.…”