Escherichia coli mutants impaired in maltodextrin transport
نویسندگان
چکیده
منابع مشابه
Maltose/maltodextrin system of Escherichia coli: transport, metabolism, and regulation.
The maltose system of Escherichia coli offers an unusually rich set of enzymes, transporters, and regulators as objects of study. This system is responsible for the uptake and metabolism of glucose polymers (maltodextrins), which must be a preferred class of nutrients for E. coli in both mammalian hosts and in the environment. Because the metabolism of glucose polymers must be coordinated with ...
متن کاملThe maltodextrin system of Escherichia coli: metabolism and transport.
The maltose/maltodextrin regulon of Escherichia coli consists of 10 genes which encode a binding protein-dependent ABC transporter and four enzymes acting on maltodextrins. All mal genes are controlled by MalT, a transcriptional activator that is exclusively activated by maltotriose. By the action of amylomaltase, we prepared uniformly labeled [(14)C]maltodextrins from maltose up to maltoheptao...
متن کاملCation Transport in Escherichia coli VIII. Potassium Transport Mutants
Analysis of K transport mutants indicates the existence of four separate K uptake systems in Escherichia coli K-12. A high affinity system called Kdp has a Km of 2 p.M, and Vmax at 37°C of 150/zmol/g min. This system is repressed by growth in high concentrations of K. Two constitutive systems, TrkA and TrkD, have K,,'s of 1.5 and 0.5 mM and Vm~x's of 550 and 40 at 37 and 30°C, respectively. Mut...
متن کاملCation Transport in Escherichia coli VIII. Potassium Transport Mutants
Analysis of K transport mutants indicates the existence of four separate K uptake systems in Escherichia coli K-12. A high affinity system called Kdp has a Km of 2 p.M, and Vmax at 37°C of 150/zmol/g min. This system is repressed by growth in high concentrations of K. Two constitutive systems, TrkA and TrkD, have K,,'s of 1.5 and 0.5 mM and Vm~x's of 550 and 40 at 37 and 30°C, respectively. Mut...
متن کاملCation transport in Escherichia coli. VIII. Potassium transport mutants
Analysis of K transport mutants indicates the existence of four separate K uptake systems in Escherichia coli K-12. A high affinity system called Kdp has a Km of 2 muM, and Vmax at 37 degrees C of 150 mumol/g min. This system is repressed by growth in high concentrations of K. Two constitutive systems, TrkA and TrkD, have Km's of 1.5 and 0.5 mM and Vmax's of 550 and 40 at 37 and 30 degrees C, r...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1979
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.140.1.1-13.1979