Direct Determination of Antibody Chain Pairing by Top-down and Middle-down Mass Spectrometry Using Electron Capture Dissociation and Ultraviolet Photodissociation
| Autor: | Weijing Liu, Jared B. Shaw, Yury V. Vasil‘ev,†,§, Carter C Bracken, Adrian Guthals, Neha Malhan, Joseph S. Beckman, Valery G. Voinov |
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| Rok vydání: | 2019 |
| Předmět: |
Photolysis
Electron-capture dissociation Ultraviolet Rays Chemistry Photodissociation Antibodies Monoclonal Trastuzumab Proteomics Immunoglobulin light chain Mass spectrometry Mass Spectrometry Article Analytical Chemistry Immunoglobulin Fab Fragments Antineoplastic Agents Immunological Pairing Cleave Biophysics Immunoglobulin Light Chains Amino Acid Sequence Immunoglobulin Heavy Chains Peptide sequence |
| Zdroj: | Anal Chem |
| ISSN: | 1520-6882 0003-2700 |
| DOI: | 10.1021/acs.analchem.9b03129 |
| Popis: | One challenge associated with the discovery and development of monoclonal antibody (mAb) therapeutics is the determination of heavy chain and light chain pairing. Advances in MS instrumentation and MS/MS methods have greatly enhanced capabilities for the analysis of large intact proteins yielding much more detailed and accurate proteoform characterization. Consequently, direct interrogation of intact antibodies or F(ab′)2 and Fab fragments has the potential to significantly streamline therapeutic mAb discovery processes. Here, we demonstrate for the first time the ability to efficiently cleave disulfide bonds linking heavy and light chains of mAbs using electron capture dissociation (ECD) and 157 nm ultraviolet photodissociation (UVPD). The combination of intact mAb, Fab, or F(ab′)2 mass, intact LC and Fd masses, and CDR3 sequence coverage enabled determination of heavy chain and light chain pairing from a single experiment and experimental condition. These results demonstrate the potential of top-down and middle-down proteomics to significantly streamline therapeutic antibody discovery. |
| Databáze: | OpenAIRE |
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