Abstract
Dyes-based biomimetic affinity chromatography has been used to purify therapeutically useful proteins. In order to design novel biomimetic affinity ligands for purification of tissue-type plasminogen activator (t-PA), small molecular fragments were achieved to fit in S3/4 binding site of t-PA by structure-based ligand design method (InsightII/Ludi). Three biomimetic affinity ligands A, B, and C were then designed, synthesized, and proved to bind the target protein (t-PA), exceeding the binding capacity of the commercial p-amino benzamidine affinity matrix. The designed affinity matrix A showed high efficiency to purify sc-tpa from the crude samples with 18-fold of purification.
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