A Basis for Reduced Chemical Library Inhibition of Firefly Luciferase Obtained from Directed Evolution
نویسندگان
چکیده
منابع مشابه
Thermostabilization of firefly luciferase by in vivo directed evolution.
Firefly luciferase is widely used in a number of areas of biotechnology and molecular biology. However, rapid inactivation of wild-type (WT) luciferases at elevated temperatures often hampers their application. A simple non-lethal in vivo screening scheme was used to identify thermostable mutants of luciferase in Escherichia coli colonies. This scheme allowed carrying out each cycle of mutagene...
متن کاملSite-directed mutagenesis of firefly luciferase active site amino acids: a proposed model for bioluminescence color.
Under physiological conditions firefly luciferase catalyzes the highly efficient emission of yellow-green light from the substrates luciferin, Mg-ATP, and oxygen. In nature, bioluminescence emission by beetle luciferases is observed in colors ranging from green (approximately 530 nm) to red (approximately 635 nm), yet all known luciferases use the same luciferin substrate. In an earlier report ...
متن کاملDevelopment of a thermostable firefly luciferase
Firefly luciferase forms the basis of a wide range of analytical techniques. However, the enzyme is unstable and rapidly loses activity even at room temperature. This leads to losses in sensitivity and precision in analytical applications and also severely limits the fieldability of devices incorporating luciferase-based technologies. A number of point mutations have previously been identified ...
متن کاملMolecular basis for the high-affinity binding and stabilization of firefly luciferase by PTC124.
Firefly luciferase (FLuc), an ATP-dependent bioluminescent reporter enzyme, is broadly used in chemical biology and drug discovery assays. PTC124 (Ataluren; (3-[5-(2-fluorophenyl)-1,2,4-oxadiazol-3-yl]benzoic acid) discovered in an FLuc-based assay targeting nonsense codon suppression, is an unusually potent FLuc-inhibitor. Paradoxically, PTC124 and related analogs increase cellular FLuc activi...
متن کاملSite-directed mutagenesis of firefly luciferase: implication of conserved residue(s) in bioluminescence emission spectra among firefly luciferases.
The bioluminescence colours of firefly luciferases are determined by assay conditions and luciferase structure. Owing to red light having lower energy than green light and being less absorbed by biological tissues, red-emitting luciferases have been considered as useful reporters in imaging technology. A set of red-emitting mutants of Lampyris turkestanicus (Iranian firefly) luciferase has been...
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ژورنال
عنوان ژورنال: Journal of Medicinal Chemistry
سال: 2009
ISSN: 0022-2623,1520-4804
DOI: 10.1021/jm8014525