摘要:
A modified luciferase protein which is a sensor for molecules including cAMP, cGMP, calcium, chelators thereof, kinases, or phosphatases is provided. Also provided is a circularly permuted anthozoan luciferase protein and a decapod crustacean luciferase protein, optionally containing one or more heterologous amino acid sequences, at least one of which directly or indirectly interacts with a molecule of interest. Further provided is a modified anthozoan luciferase protein and a decapod crustacean luciferase protein containing an insertion of one or more heterologous amino acid sequences, at least one of which directly or indirectly interacts with a molecule of interest.
摘要:
Luciferase enzymes with greatly increased thermostability, e.g., at least half lives of 2 hours at 50° C., cDNAs encoding the novel luciferases, and hosts transformed to express the luciferases, are disclosed. Methods of producing the luciferases include recursive mutagenesis. The luciferases are used in conventional methods, some employing kits.
摘要:
Luciferase enzymes with greatly increased thermostability, e.g., at least half lives of 2 hours at 50° C., cDNAs encoding the novel luciferases, and hosts transformed to express the luciferases, are disclosed. Methods of producing the luciferases include recursive mutagenesis. The luciferases are used in conventional methods, some employing kits.
摘要:
Disclosed are methods and kits for detecting mutations in DNA by comparing the size of an amplified microsatellite locus to the expected size. The methods and kits may used in various applications, including monitoring exposure of a cell or organism to a mutagen, evaluating the mutagenicity of an agent, and evaluating a putative precancerous or cancerous cell or tumor cell for microsatellite instability.
摘要:
The present invention is directed to compositions and methods for single-step extraction and detection of ATP levels from microbial cells. The disclosed compositions are formulated to efficiently elicit bioluminescent detection of ATP among a broad variety of different microorganisms using a common single-step reagent composition. Additional luminescence-based methods are provided for identifying other useful extracting agents or for screening compounds for their pharmaceutical or biological effects on microbial cells.
摘要:
The invention provides a mutant hydrolase protein with enhanced kinetics and functional expression, as well as polynucleotides encoding the mutant proteins and methods of using the polynucleotides and mutant proteins.
摘要:
Processes are disclosed using the depolymerization of a nucleic acid hybrid to qualitatively and quantitatively analyze for the presence of predetermined nucleic acid target sequences using a multiplex assay format. Applications of those processes include the detection of single nucleotide polymorphisms, identification of single base changes, speciation, genotyping, medical marker diagnostics, and the like.
摘要:
The invention provides active, non-naturally occurring mutants of beetle luciferases and DNAs which encode such mutants. A mutant luciferase of the invention differs from the corresponding wild-type luciferase by producing bioluminescence with a wavelength of peak intensity that differs by at least 1 nm from the wavelength of peak intensity of the bioluminescence produced by the wild-type enzyme. The mutant luciferases and DNAs of the invention are employed in various biosensing applications.
摘要:
Processes are disclosed using the depolymerization of a nucleic acid hybrid to qualitatively and quantitatively analyze for the presence of a predetermined exogenous nucleic acid. Applications of those processes include the detection of single nucleotide polymorphisms, identification of single base changes, determination of viral load, genotyping, medical marker diagnostics, and the like.