Open AccessTransport of Hexoses in Streptomyces violaceoruber
Author(s) -
Sabater Bartolomé,
Asensio Carlos
Publication year - 1973
Publication title -
european journal of biochemistry
Language(s) - English
Resource type - Journals
eISSN - 1432-1033
pISSN - 0014-2956
DOI - 10.1111/j.1432-1033.1973.tb03118.x
Subject(s) - fructose , mannose , spore , streptomyces , mycelium , chemistry , biochemistry , biology , microbiology and biotechnology , bacteria , botany , genetics
1 Transport of glucose, mannose and fructose has been studied in spores and mycelia of Streptomyces violaceroruber grown under a variety of nutritional conditions. 2 Each of the three sugars is transported into mycelial cells by a specific, constitutive transport system. The apparent Michaelis constants of these systems for glucose, mannose and fructose are 1, 1.5 and 3 mM, respectively. At least in the case of mannose and fructose, transport seems to be of the non‐active type. 3 In contrast with vegetative cells, spores of Streptomyces appreciably transport only glucose, with a K m of 1 mM, but not mannose and fructose. This observation can be related to the lag for growth of Streptomyces spores on mannose or fructose with respect to growth on glucose.