Kinetic Characteristics of the Two Glucose Transport Systems in Neurospora crassa
نویسندگان
چکیده
منابع مشابه
A derepressible active transport system for glucose in Neurospora crassa.
Two glucose uptake systems have been detected in ungerminated conidia of wild type Neurospora crassa, strain 74A; the high &ty system has been characterized. Uptake and substrate competition experiments showed that the high &inity system was relatively speciiic for D-glucose but also trsnsported the nonmetabolizable analogues 6-deoxy-D&ucase, 2-deoxy-D-glucose, and 3-O-methyl-D-glucose. The sys...
متن کاملSugar Transport in Neurospora crassa*
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...
متن کاملInteractions between amino acid transport systems in Neurospora crassa.
Mutants of Neurospora crassa, selected as resistant to l-canavanine and l-thialysine, are partially deficient in the uptake of basic amino acids. Neutral amino acids completely inhibit uptake of basic amino acids, and this inhibition is dependent on the activity of a neutral amino acid permease. In contradistinction, mutants resistant to 4-methyl-dl-tryptophan are partially deficient in the upt...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1971
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.106.2.479-486.1971