Tryptophan Transport in Neurospora crassa II. Metabolic Control
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Tryptophan transport in Neurospora crassa. II. Metabolic control.
The rate of tryptophan transport in Neurospora is regulated by the intracellular pool of tryptophan. When cells were shifted from growth in minimal medium to tryptophan-containing medium for 10 min, there was a 50% reduction in the rate of tryptophan transport. Intracellular tryptophan pools derived from indole were equally effective in reducing the rate of transport as externally supplied tryp...
متن کاملTryptophan transport in Neurospora crassa. I. Specificity and kinetics.
Wiley, W. R. (Battelle Memorial Institute, Richland, Wash.), and W. H. Matchett. Tryptophan transport in Neurospora crassa. I. Specificity and kinetics. J. Bacteriol. 92:1698-1705. 1966.-The transport of tryptophan in Neurospora crassa is mediated by a distinct stereospecific system which is chemically specific for a family of neutral amino acids. The process shows typical saturation kinetics a...
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The transport of several sugars by cells of Neurospora crassa grown in shake culture has been investigated. 3-OMethyl-n-glucose is a substrate for the glucose transport system in glucose-grown cells but cannot be phosphorylated by the ATP-dependent hexokinase which readily catalyzes the phosphorylation of D-glucose. Since this nonmetabolizable glucose analogue cannot be accumulated against a co...
متن کاملPolyamine transport in Neurospora crassa.
Polyamine transport in Neurospora crassa is concentrative and energy dependent in a dilute buffer. The saturable systems governing the uptake of putrescine (Km = 0.6 mM), spermidine (Km = ca. 0.24 mM), and spermine (Km = 0.07 mM) share components, as indicated by mutual inhibition among the polyamines. In addition, nonsaturable components prevail for putrescine and spermidine, particularly the ...
متن کاملSpecificity of nucleoside transport in Neurospora crassa.
The specificity of nucleoside uptake in germinating conidia of Neurospora crassa was investigated by examining the kinetics of [2-14C]uridine and [8-14C]-adenosine uptake in the wild-type, ad-8, and ud-1 pyr-1 strains. The results obtained strongly indicate that nucleoside transport in N. crassa is mediated solely by a general transport system which accepts both purine and pyrimidine nucleoside...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1968
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.95.3.959-966.1968