The present application provides a method of diagnosing bacterial infections using engineered glycoproteins in an immunoassay. The engineered bacterial glycoproteins used in the immunoassay comprise a bacterial antigen covalently attached to a protein via polysaccharyltransferase (PTase)-mediated glycosylation, wherein the bacterial antigen is selected based on the bacterial infection of interest. Antibodies in a bodily fluid of subjects infected with a bacteria will bind to the engineered glycoprotein, and the resulting binding complexes are detected or quantitated.

The present application provides a method of diagnosing bacterial infections using engineered glycoproteins in an immunoassay. The engineered bacterial glycoproteins used in the immunoassay comprise a bacterial antigen covalently attached to a protein via polysaccharyltransferase (PTase)-mediated glycosylation, wherein the bacterial antigen is selected based on the bacterial infection of interest. Antibodies in a bodily fluid of subjects infected with a bacteria will bind to the engineered glycoprotein, and the resulting binding complexes are detected or quantitated.

Helicobacter pylori is a leading cause of gastric mucosal inflammation, peptic ulcers, and gastric adenocarcinoma. Emerging antimicrobial-resistant H. pylori has hampered the successful eradication of frequent chronic infections. Additionally, due to the absence of effective vaccines against H. pylori, a safe vaccine is highly demanded. Disclosed herein are innovative Protective Immunity Enhanced Salmonella Vaccine (PIESV) vector strains to deliver and express multiple H. pylori antigen genes Immunization of mice with a vaccine delivering the HpaA, NapA (also termed Hp-NAP), UreA and UreB antigens, provided sterile protection against H. pylori SS1 infection in 7 out of 10 tested mice. Compared to the control groups that had received PBS or a PIESV with an empty vector, immunized mice exhibited specific and significant cellular recall responses and antigen-specific IgG2c, IgG1, total IgG and gastric IgA antibody titers. Importantly, the mice immunized with the vaccine candidate showed a significant reduction in a load of an unidentified Gram-positive rod-shaped bacteria in their stomach compared to the control groups. In conclusion, a Salmonella Typhimurium-based live vaccine delivering four antigens shows promise as a safe and effective vaccine against H. pylori infection.

This disclosure relates to antigenic EBV polypeptides and their use in eliciting antibodies against EBV. Also disclosed are antigenic polypeptides comprising an EBV polypeptide and a ferritin protein.

The present disclosure provides compositions and methods for preparing engineered porous protein crystals comprising at least one guest molecule.

The present disclosure provides compositions and methods for preparing engineered porous protein crystals comprising at least one guest molecule.

There is provided novel peptides for use in diagnosis of CagA+ H. pylori infection or the prediction of risk for gastric cancer. The peptides bind antibodies from CagA+ H. pylori patients with high specificity and sensitivity, and can be used for example in a diagnostic kit.

There is provided novel peptides for use in diagnosis of CagA+ H. pylori infection or the prediction of risk for gastric cancer. The peptides bind antibodies from CagA+ H. pylori patients with high specificity and sensitivity, and can be used for example in a diagnostic kit.

The present invention provides a method for the functionalization of a polymeric surface with a protein by physical adsorption. The method enables a membrane spanning protein to be used as an anchor for proteins and/or peptides for display. Also provided are polymeric substrates for protein or peptide display, and related kits and methods of use.

The present invention provides a method for the functionalization of a polymeric surface with a protein by physical adsorption. The method enables a membrane spanning protein to be used as an anchor for proteins and/or peptides for display. Also provided are polymeric substrates for protein or peptide display, and related kits and methods of use.