Abstract: The disclosure generally relates to binding proteins that comprise antigen binding sites, a T cell receptor binding site, and a T cell co-stimulatory molecule binding site. The disclosure also relates to pharmaceutical compositions comprising such binding proteins, nucleic acid molecules encoding such binding proteins, and vectors comprising such nucleic acid molecules. The disclosure further relates to methods of treating a disorder or condition using such binding proteins and pharmaceutical compositions, binding proteins and pharmaceutical compositions for use in the treatment of a disorder or condition, and the use of such binding proteins and pharmaceutical compositions for the manufacture of a medicament for treating a disorder or condition.

Abstract: Provided are T ell engaging molecules that bind an antigen on a non-immune cell and an antigen on an immune cell. The T cell engaging molecules can bind STEAP2 on a cancer cell and, e.g., a CD3 on a T cell. The T cell engaging molecules can also bind STEAP2 on a cancer cell and, e.g., a CD8 on a T cell. Alternatively, the T cell engaging molecules can bind STEAP2 on a cancer cell and both CD3 and CD8 on a T cell.

Abstract: The present disclosure relates to antibodies or fragments thereof comprising an antigen binding domain capable of binding to a CD3 protein or a fragment thereof. The present disclosure also relates to such antibodies that bind to CD3 having optimized affinity to induce T cell activation, but without being associated with excessive cytokine release and reduced tolerability. The disclosure also relates to methods of producing these antibodies and their therapeutic uses.

Abstract: Provided herein are multispecific antibodies containing a lambda charge pair introduced into the interface of a heavy chain and a light chain to reduce chain mispairing.

Abstract: Provided herein are trispecific antibodies containing three antigen binding arms each capable of binding to a different target, wherein each antigen binding arm contains a different lambda or kappa charge pair introduced into the interface of the respective heavy and light chains to reduce chain mispairing.

Abstract: Provided herein is a multispecific antibody containing two antigen binding arms capable of binding to a first target and at least one antigen binding arm capable of binding to a second target. The multispecific antibody includes a lambda charge pair introduced into the interface of a heavy chain and a light chain to reduce chain mispairing.

Abstract: Provided herein are compositions and methods for immunotherapy. In particular, provided herein are chimeric antigen receptors, cells expressing chimeric antigen receptors, and use of such cells in immunotherapy (e.g., cancer immunotherapy).