This invention relates to, in part, compositions of beta-lactamases and methods of using these enzymes in, for example, gastrointestinal tract (GI tract) disorders such as C. difficile infection (CDI).

Recombinant bacterial cells are provided that comprise a stable non-canonical amino acid translation pathway. In some aspects, the bacteria comprise nucleic acids encoding a non-canonical amino acid translation pathway (e.g., a tRNA for incorporation of a non-canonical amino acid, such selenocysteine); a marker polypeptide that includes the non-canonical amino acid. Recombinant tRNA and selection marker coding sequences are likewise provided.

The disclosure provides constructs comprising a first fusion protein, a second fusion protein, and a linker, wherein the first fusion protein and the second fusion protein each include an affinity reagent and a reactive enzyme, and the linker includes a first and second functional groups specific for irreversibly inhibiting the first and second fusion protein reactive enzymes. The disclosure further provides a method including (a) contacting a first fusion protein including an affinity reagent and a reactive enzyme with a linker including a functional group specific for irreversibly inhibiting the first fusion protein reactive enzyme thereby coupling the first fusion protein and the linker, and (b) contacting a second fusion protein including an affinity reagent and a reactive enzyme with the linker, the linker including a functional group specific for irreversibly inhibiting the second fusion protein reactive enzyme thereby coupling the second fusion protein and the linker.

The present invention relates to pharmaceuticals and modified beta-lactamases. Specifically, the invention relates to novel recombinant beta-lactamases and pharmaceutical compositions comprising the beta-lactamases.

Also, the present invention relates to methods for modifying a beta-lactamase, producing the beta-lactamase and treating or preventing beta-lactam antibiotic induced adverse effects. Furthermore, the present invention relates to the beta-lactamase for use as a medicament and to the use of the beta-lactamase in the manufacture of a medicament for treating or preventing beta-lactam antibiotics induced adverse effects.

Still further, the invention relates to a polynucleotide and a host cell comprising the polynucleotide.

The present invention relates to a carbapenemase and methods using said carbapenemase such as detection methods, screening methods, predictive methods and therapeutic uses.

The present invention relates to pharmaceuticals and modified beta-lactamases. Specifically, the invention relates to novel recombinant beta-lactamases and pharmaceutical compositions comprising the beta-lactamases. Also, the present invention relates to methods for modifying a beta-lactamase, producing the beta-lactamase and treating or preventing beta-lactam antibiotic induced adverse effects. Furthermore, the present invention relates to the beta-lactamase for use as a medicament and to the use of the beta-lactamase in the manufacture of a medicament for treating or preventing beta-lactam antibiotics induced adverse effects. Still further, the invention relates to a polynucleotide and a host cell comprising the polynucleotide.

The present invention relates to improved protein-based biosensors that are suitable for detection of one or more target molecules in a sample. The biosensors are fully-reversible with dynamic ranges suitable for analytic and diagnostic applications. The biosensors of the present invention may be used in synthetic biology, for example in constructing artificial cellular or extracellular signalling networks.

This invention provides, in part, various compositions and methods for protecting the gastrointestinal microbiome from antibiotic disruption from orally administered antibiotics.

Among other things, the present invention is related to devices and methods for improving optical analysis of a thin layer of a sample sandwiched between two plates.

Recombinant bacterial cells are provided that comprise a stable non-canonical amino acid translation pathway. In some aspects, the bacteria comprise nucleic acids encoding a non-canonical amino acid translation pathway (e.g., a tRNA for incorporation of a non-canonical amino acid, such selenocysteine); a marker polypeptide that includes the non-canonical amino acid. Recombinant tRNA and selection marker coding sequences are likewise provided.