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Generation of a Monoclonal Antibody to Detect Elastin-like Polypeptides.

Authors
  • Kouhi, Aida
  • Yao, Zhiyuan
  • Zheng, Long
  • Li, Zhe
  • Hu, Peisheng
  • Epstein, Alan L
  • MacKay, J Andrew
Type
Published Article
Journal
Biomacromolecules
Publisher
American Chemical Society
Publication Date
Aug 12, 2019
Volume
20
Issue
8
Pages
2942–2952
Identifiers
DOI: 10.1021/acs.biomac.9b00503
PMID: 31276401
Source
Medline
Language
English
License
Unknown

Abstract

The identification and use of antibodies dominate 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 polypeptides (ELPs), 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 toward ELPs and ELP fusion proteins. A purified antibody was evaluated in an ELISA, western blotting, and immunofluorescence assay. The optimal anti-ELP mAb proved to be highly reactive and specific toward 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 a great excess of ELPs, 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, experimental detection, and characterization of these biopolymers.

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