| abstract |
The present invention relates to compositions and crystals of CD154 (CD40L) in complex with an anti-CD154 antibody. In addition, this invention relates to the high resolution structure of a CD154/anti-CD154 antibody complex as obtained by X-ray crystallography. Specifically, this structure provides binding sites defined by the structure coordinates determined herein. This invention also relates to a computer (machine) comprising a machine-readable data storage medium comprising a data storage material encoded with machine-readable data comprising the structure coordinates provided by this invention. The computer has instructions to process said machine-readable data into a three-dimensional representation of a molecular complex of CD154/anti-CD154 antibody based on the structure coordinates provided by this invention. This invention also relates to methods using the structure coordinates of an CD154/anti-CD154 antibody complex to solve the structure of similar or homologous molecular complexes, as well as methods using the structure coordinates of an CD154/anti-CD154 antibody complexto design chemical entities or compounds, including agonists or antagonists of CD154, that specifically bind CD154 and function as CD40:CD154 binding interruptors, as well as to design variants of monoclonal antibody 5c8, or humanized monoclonal antibody 5c8, or antigen binding fragements thereof, having improved properties (such as increased or decreased binding affinity for CD154). This invention also relates to compositions comprising said chemical entities, compounds or variants of monoclonal antibody 5c8 or humanized monoclonal antibody 5c8. The invention further relates to uses of said chemical entities, compounds or variants of monoclonal antibody 5c8 or humanized monoclonal antibody 5c8 to treat a subject having one or more conditons associated with inappropriate or abnormal CD154 induced activation. |