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Lee T, Kim JH, Kwon SJ, Seo JW, Park SH, Kim J, Jin J, Hong JH, Kang HJ, Sharma C, Choi JH, Chung SJ. Site-Selective Antibody-Drug Conjugation by a Proximity-Driven S to N Acyl Transfer Reaction on a Therapeutic Antibody. J Med Chem 2022; 65:5751-5759. [PMID: 35319890 DOI: 10.1021/acs.jmedchem.2c00084] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Immunoglobulin Gs (IgGs) contain many Lys and Cys residues, which results in an unwanted complex product mixture with conventional drug conjugation methods. We selectively acylated the ε-NH2 of K248 on trastuzumab using an IgG Fc-binding peptide (FcBP) equipped with a 5-norbornene-2-carboxylic acid thioester (AbClick-1). AbClick-1 locates its thioester close to the ε-NH2 of K248 while binding to trastuzumab. Consequently, the thioester underwent proximity-driven selective acylation of ε-NH2 through an S to N acyl transfer reaction. Furthermore, N-tert-butyl maleimide accelerated the cross-linking reaction with an approximately 95% yield of the desired product by scavenging the byproduct (FcBP-SH). Only K248 was modified selectively with the 5-norbornene-2-carbonyl group, which was further modified by click reaction to afford an antibody-drug conjugate (ADC) with two drugs per antibody. The resulting ADCs showed remarkable in vitro and in vivo anticancer activity. Our results demonstrate that a thioester is a promising chemical entity for proximity-driven site-selective conjugation of antibodies.
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Affiliation(s)
- TaeJin Lee
- School of Pharmacy, Sungkyunkwan University, 2066 Seoburo, Jangangu, Suwon 16419, Republic of Korea.,AbTis Company Ltd., A-815, Suwon Venture Valley II, 142-10, Saneop-ro156beon-gil, Gwonseon-gu, Suwon, Gyeonggi-do 16648, Republic of Korea
| | - Ju Hwan Kim
- AbTis Company Ltd., A-815, Suwon Venture Valley II, 142-10, Saneop-ro156beon-gil, Gwonseon-gu, Suwon, Gyeonggi-do 16648, Republic of Korea
| | - Se Jeong Kwon
- School of Pharmacy, Sungkyunkwan University, 2066 Seoburo, Jangangu, Suwon 16419, Republic of Korea.,AbTis Company Ltd., A-815, Suwon Venture Valley II, 142-10, Saneop-ro156beon-gil, Gwonseon-gu, Suwon, Gyeonggi-do 16648, Republic of Korea
| | - Jin Woo Seo
- School of Pharmacy, Sungkyunkwan University, 2066 Seoburo, Jangangu, Suwon 16419, Republic of Korea.,AbTis Company Ltd., A-815, Suwon Venture Valley II, 142-10, Saneop-ro156beon-gil, Gwonseon-gu, Suwon, Gyeonggi-do 16648, Republic of Korea
| | - Sun Hee Park
- School of Pharmacy, Sungkyunkwan University, 2066 Seoburo, Jangangu, Suwon 16419, Republic of Korea.,AbTis Company Ltd., A-815, Suwon Venture Valley II, 142-10, Saneop-ro156beon-gil, Gwonseon-gu, Suwon, Gyeonggi-do 16648, Republic of Korea
| | - Jinyoung Kim
- Biocenter, Gyeonggido Business and Science Accelerator, Suwon 16229, Republic of Korea
| | - Jonghwa Jin
- Department of Convergence Technical Support, New Drug Development Center, 123 Osongsaengmyeng-ro, Cheongju, Chungbuk 28160, Republic of Korea
| | - Ji Hye Hong
- Department of Convergence Technical Support, New Drug Development Center, 123 Osongsaengmyeng-ro, Cheongju, Chungbuk 28160, Republic of Korea
| | - Hyo Jin Kang
- AbTis Company Ltd., A-815, Suwon Venture Valley II, 142-10, Saneop-ro156beon-gil, Gwonseon-gu, Suwon, Gyeonggi-do 16648, Republic of Korea
| | - Chiranjeev Sharma
- Department of Biopharmaceutical Convergence, Graduate School, Sungkyunkwan University, 2066 Seoburo, Jangangu, Suwon 16419, Republic of Korea
| | - Ji Hoon Choi
- School of Pharmacy, Sungkyunkwan University, 2066 Seoburo, Jangangu, Suwon 16419, Republic of Korea
| | - Sang J Chung
- School of Pharmacy, Sungkyunkwan University, 2066 Seoburo, Jangangu, Suwon 16419, Republic of Korea.,AbTis Company Ltd., A-815, Suwon Venture Valley II, 142-10, Saneop-ro156beon-gil, Gwonseon-gu, Suwon, Gyeonggi-do 16648, Republic of Korea.,Department of Biopharmaceutical Convergence, Graduate School, Sungkyunkwan University, 2066 Seoburo, Jangangu, Suwon 16419, Republic of Korea
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