Generation of a Monoclonal Antibody to Detect Elastin-like Polypeptides (original) (raw)

The identification and use of antibodies dominates the biologic, clinical diagnostic, and therapeutic landscapes. In particular, antibodies have become essential tools in a variety of protein analytical experiments and to study the disposition of biologic therapeutics. One emerging class of peptide biologics is known as the Elastin-like polypeptide (ELP), which are repetitive protein polymers inspired by human tropoelastin. A major limitation in the clinical translation of ELP biologics has been a lack of a monoclonal antibody (mAb) to characterize their identity during expression. To facilitate these studies, we successfully generated a new mAb that is specific towards ELPs and ELP fusion proteins. Purified antibody was evaluated in ELISA, Western Blotting, and immunofluorescence assay. The optimal anti-ELP mAb proved highly reactive and specific towards ELPs. Moreover, they were able to detect ELPs with a variety of aliphatic guest residues. ELPs phase separate in response to heating; furthermore, when incubated at great excess to ELP the anti-ELP mAb partially blocks phase separation. These findings are direct evidence that novel murine mAbs can be raised against purified ELPs. This new reagent will enable purification and experimental detection, and characterization of these biopolymers.

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