摘要:
System for detecting an antigen comprising: —a first fusion protein with no luciferase activity comprising: —a N-terminal domain which comprises a first single domain antibody which is directed against a first epitope of said antigen and —a C-terminal domain which comprises a first fragment of a luciferase having the amino acid sequence SEQ ID NO: 1 or is a variant thereof and —a second fusion protein with no luciferase activity comprising: —a N-terminal domain which comprises a second single domain antibody which is directed against a second epitope of said antigen and —a C-terminal domain which comprises a second fragment of a luciferase having the amino acid sequence SEQ ID NO: 2 or is a variant thereof. Luminescence is emitted in the presence of a substrate when both the first fusion protein and the second fusion protein bind to said antigen.
摘要:
The present disclosure discloses a novel coronavirus SARS-COV-2 safe replicon system and use thereof in screening an anti-SARS-COV-2 drug. The safe replicon system specifically comprises a nucleic acid sequence encoding a novel coronavirus SARS-COV-2 non-structural protein; and nucleic acid sequences of 5′ UTR and 3′ UTR of a novel coronavirus SARS-COV-2, a transcription regulatory region on which the novel coronavirus SARS-COV-2 non-structural protein can act, and a reporter gene. With the SARS-COV-2 safe replicon system, high-throughput screening of anti-SARS-COV-2 drugs and pharmacologic verification of drugs can be carried out independent of a biosafety level 3 laboratory, and the operation is simple and convenient.
摘要:
The present disclosure relates to biosensing systems and biosensing elements having increased storage capability and increased functional lifetimes through using compositions and methods for recycling cofactors.
摘要:
Provided herein is a large immuno-sorbent surface area assay (ALISSA) for the rapid and sensitive detection of botulinum neurotoxins (BoNTs) and anthrax toxin. This assay is designed to capture a low number of toxin molecules and to measure their intrinsic protease activity via conversion of a fluorogenic or luminescent substrate. Also provided herein are novel peptides that can be specifically cleaved by BoNT and novel peptides that are resistant to cleavage by BoNT. The combination of these cleavable and control peptides can be used for implementation of an exemplary ALISSA used to specifically detect BoNT enzymatic activity. Furthermore, the ALISSA as described herein may also be used in a column based format for use in a high-throughput system for testing large quantities of samples.
摘要:
Disclosed are methods and systems for the isolation and detection of microbes from a sample. The use of binding agents for isolation of a microbe of interest from a sample are described. In certain embodiments, the methods use ribosome-based and/or bacteriophage-based amplification of the signal in detection of bacteria and other microorganisms. For example, embodiments of the present invention can achieve total amplification of at least 10,000 from a single infected cell.
摘要:
Described herein is a bioluminescence resonance energy transfer (BRET) based system and method to monitor ternary complex formation in real-time in live cells with high sensitivity and accuracy. This system transfers energy simultaneously between a luciferase donor and intermediate and terminal acceptors, appropriately chosen to also enable transfer from the intermediate to terminal acceptor while minimizing contaminating signals. The system may also be adapted for quaternary complex detection by including a protein complementation assay (PCA) component. The system is broadly applicable to the detection of any protein ternary/quaternary complex such as those involving nuclear receptors, GPCRs, Receptor Tyrosine Kinase (RTKs), multimeric enzymes or structural proteins.
摘要:
The invention relates to the fields of screening assays, compounds, and methods for altering gene expression and protein levels. In particular, the invention includes assays to screen for agents capable of modulating gene expression in a UTR-dependent manner and agents capable of modulating gene expression.
摘要:
Provided is a method of attaching a molecule-of-interest to a microtube, by co-electrospinning two polymeric solutions through co-axial capillaries, wherein a first polymeric solution of the two polymeric solutions is for forming a shell of the microtube and a second polymeric solution of the two polymeric solutions is for forming a coat over an internal surface of the shell, the first polymeric solution is selected solidifying faster than the second polymeric solution and a solvent of the second polymeric solution is selected incapable of dissolving the first polymeric solution and wherein the second polymeric solution comprises the molecule-of-interest, thereby attaching the molecule-of-interest to the microtube. Also provided is an electrospun microtube comprising an electrospun shell, an electrospun coat over an internal surface of the shell and a molecule-of-interest attached to the microtube.
摘要:
The present disclosure provides a monitoring device comprising a test composition, a test element comprising a test portion to which the test composition is releasably adhered, a detection reagent, and a container comprising a first end with an opening and a second end opposite the first end. The test composition comprises a predetermined quantity of tracer analyte. The container is configured to receive the test portion and configured to be operationally coupled to an analytical instrument. The tracer analyte and the detection reagent each are capable of participating in one or more chemical reaction that results in the formation of a detectable product. A method of using the monitoring device to assess the efficacy of a washing process is also provided.