Stefan Zielonka

Becoming the bull : Structural insights and engineering strategies for ultralong CDR ‐ H3 paratopes from cattle

Cattle produce a subset of antibodies (Abs) with unique architecture. These immunoglobulins feature an ultralong CDR-H3 (uCDR-H3) composed of up to about 70 amino acids that protrudes from the scaffold and folds into a distinct stalk-and-knob structure. The knob is a disulfide-ri...

Antibody framework engineering enables augmented cytokine receptor signaling capacities of bispecific single domain antibody-based IL-21 mimetics

In this work, we developed bispecific antibody (bsAb)-derived surrogate agonists which mimic the function of IL-21 by targeting the IL-21 receptor composed of IL-21 R (CD360) and IL-2 Rγ (CD132). For this, antigen-specific VHHs (variable domains of the heavy chain of heavy-chain-...