L-Asparaginase from Escherichia coli
نویسندگان
چکیده
منابع مشابه
L-Asparaginase from escherichia coli B. Succinylation and subunit interactions.
Asparaginase from Esckerickio coli B has been modified with increasing amounts of [r4C]succinic anhydride. Enzyme activity is enhanced when 15 % and 25 % of the lysyl residues are succinylated. Up to 40% of the lysyl residues were succinylated without destroying enzyme activity and without causing dissociation of this oligomeric protein. More extensive succinylation causes dissociation into sub...
متن کاملCrystal packing of plant-type L-asparaginase from Escherichia coli.
Plant-type L-asparaginases hydrolyze the side-chain amide bond of L-asparagine or its beta-peptides. They belong to the N-terminal nucleophile (Ntn) hydrolases and are synthesized as inactive precursor molecules. Activation occurs via the autoproteolytic release of two subunits, alpha and beta, the latter of which carries the nucleophile at its N-terminus. Crystallographic studies of plant-type...
متن کاملProduction of L-asparaginase II by Escherichia coli.
l-Asparaginase II was synthesized at constant rates by Escherichia coli under anaerobic conditions. The enzyme was produced optimally by bacteria grown between pH 7 and 8 at 37 C. Although some enzyme was formed aerobically, between 100 and 1,000 times more asparaginase II was produced during anaerobic growth in media enriched with high concentrations of a variety of amino acids. Bacteria grown...
متن کاملProduction and optimization of L-asparaginase in Escherichia coli
-ASPARAGINASE (L-ASNase) has been widely used as a therapeutic agent in the treatment for various lymphoblastic leukemia diseases. This study aimed to isolate and purify local bacterial isolates that are capable of producing L-ASNase, so 150 bacterial isolates from the Nile River where isolated, purified and their ability to produce L-ASNase was assessed. Among these isolates, 32 bacterial isol...
متن کاملRecombinant L-Asparaginase from Zymomonas mobilis: A Potential New Antileukemic Agent Produced in Escherichia coli
L-asparaginase is an enzyme used as a chemotherapeutic agent, mainly for treating acute lymphoblastic leukemia. In this study, the gene of L-asparaginase from Zymomonas mobilis was cloned in pET vectors, fused to a histidine tag, and had its codons optimized. The L-asparaginase was expressed extracellularly and intracellularly (cytoplasmically) in Escherichia coli in far larger quantities than ...
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ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1971
ISSN: 0002-1369,1881-1280
DOI: 10.1271/bbb1961.35.743