Abstract: Provided herein are VHH-containing polypeptides that bind OX40. In some embodiments, VHH-containing polypeptides that bind and agonize OX40 are provided. Uses of the VHH-containing polypeptides are also provided.

Abstract: The invention relates generally to multispecific polypeptides that bind at least CD3, a second antigen, and a receptor of a T cell, such as a costimulatory receptor or an inhibitory receptor, in which the multispecific polypeptide constructs are able to engage CD3. In some embodiments, the multispecific polypeptide constructs bind a costimulatory receptor and provide costimulatory binding activity. In some embodiments, the multispecific polypeptide constructs bind an inhibitory receptor and block inhibitory activity. In some aspects, the multispecific polypeptides have constrained CD3 binding and bind to or engage CD3 only upon binding to the second antigen, such as a tumor associated antigen. In some embodiments, the multispecific polypeptides contain cleavable linkers that, when cleaved, result in dual effector functions. Also provided are methods of making and using these multispecific polypeptides in a variety of therapeutic, diagnostic and prophylactic indications.

Abstract: The invention provides modifications within human or humanized single domain antibody fragments (sdAbs) that prevent recognition by pre-existing antibodies, to isolated polypeptides that include these modifications, and to methods and uses thereof.

Abstract: This invention relates generally to molecules that specifically engage 41BB, a member of the TNF receptor superfamily (TNFRSF). More specifically, this invention relates to multivalent and multispecific molecules that bind at least 41BB.

Abstract: This invention relates generally to molecules that specifically bind bacterial V-tip proteins of the type III secretion system of Gram negative bacteria such as PcrV from Pseudomonas aeruginosa. More specifically, this invention relates to molecules that block the injection of effector molecules into target cells. This invention also relates to molecules that specifically bind to bacterial lipoproteins, such as OprI. The molecules of the present invention are monospecific or multispecific and can bind their target antigen in a monovalent or multivalent manner. The invention also relates generally to molecules that specifically bind bacterial cell surface proteins such as OprI, and to methods of use these molecules in a variety of therapeutic, diagnostic, and/or prophylactic indications.

Abstract: The invention relates generally to multispecific polypeptides having constrained CD3 binding. In some embodiments, components of the multispecific polypeptides are connected by a non-cleavable linker. Also provided are methods of making and using these multispecific polypeptides in a variety of therapeutic, diagnostic and prophylactic indications.

Abstract: The disclosure relates generally to molecules that specifically engage death receptor 5 (DR5), a member of the TNF receptor superfamily (TNFRSF). More specifically the disclosure relates to multivalent and multispecific molecules that bind at least DR5.

Abstract: This invention relates generally to molecules that specifically engage OX40, a member of the TNF receptor superfamily (TNFRSF). More specifically this invention relates to multivalent and multispecific molecules that bind at least OX40.

Abstract: This invention relates generally to molecules that specifically bind bacterial V-tip proteins of the type III secretion system of Gram negative bacteria such as PcrV from Pseudomonas aeruginosa. More specifically, this invention relates to molecules that block the injection of effector molecules into target cells. This invention also relates to molecules that specifically bind to bacterial lipoproteins, such as OprI. The molecules of the present invention are monospecific or multispecific and can bind their target antigen in a monovalent or multivalent manner. The invention also relates generally to molecules that specifically bind bacterial cell surface proteins such as OprI, and to methods of use these molecules in a variety of therapeutic, diagnostic, and/or prophylactic indications.

Abstract: The disclosure relates generally to molecules that specifically engage death receptor 5 (DR5), a member of the TNF receptor superfamily (TNFRSF). More specifically the disclosure relates to multivalent and multispecific molecules that bind at least DR5.

Abstract: This disclosure generally provides molecules that specifically engage glucocorticoid-induced TNFR-related protein (GITR), a member of the TNF receptor superfamily (TNFRSF). More specifically, the disclosure relates to multivalent and/or multispecific molecules that bind at least GITR.

Abstract: The invention relates generally to multispecific polypeptides having constrained CD3 binding. In some embodiments, the multispecific polypeptides contain cleavable linkers that, when cleaved, results in dual effector functions. Also provided are methods of making and using these multispecific polypeptides in a variety of therapeutic, diagnostic and prophylactic indications.

Abstract: This disclosure generally provides molecules that specifically engage glucocorticoid-induced TNFR-related protein (GITR), a member of the TNF receptor superfamily (TNFRSF). More specifically, the disclosure relates to multivalent and/or multispecific molecules that bind at least GITR.