1
|
Yu X, Ruan M, Wang Y, Nguyen A, Xiao W, Ajena Y, Solano LN, Liu R, Lam KS. Site-Specific Albumin-Selective Ligation to Human Serum Albumin under Physiological Conditions. Bioconjug Chem 2022; 33:2332-2340. [PMID: 36350013 PMCID: PMC9782315 DOI: 10.1021/acs.bioconjchem.2c00361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Human serum albumin (HSA) is the most abundant protein in human blood plasma. It plays a critical role in the native transportation of numerous drugs, metabolites, nutrients, and small molecules. HSA has been successfully used clinically as a noncovalent carrier for insulin (e.g., Levemir), GLP-1 (e.g., Liraglutide), and paclitaxel (e.g., Abraxane). Site-specific bioconjugation strategies for HSA only would greatly expand its role as the biocompatible, non-toxic platform for theranostics purposes. Using the enabling one-bead one-compound (OBOC) technology, we generated combinatorial peptide libraries containing myristic acid, a well-known binder to HSA at Sudlow I and II binding pockets, and an acrylamide. We then used HSA as a probe to screen the OBOC myristylated peptide libraries for reactive affinity elements (RAEs) that can specifically and covalently ligate to the lysine residue at the proximity of these pockets. Several RAEs have been identified and confirmed to be able to conjugate to HSA covalently. The conjugation can occur at physiological pH and proceed with a high yield within 1 h at room temperature. Tryptic peptide profiling of derivatized HSA has revealed two lysine residues (K225 and K414) as the conjugation sites, which is much more specific than the conventional lysine labeling strategy with N-hydroxysuccinimide ester. The RAE-driven site-specific ligation to HSA was found to occur even in the presence of other prevalent blood proteins such as immunoglobulin or whole serum. Furthermore, these RAEs are orthogonal to the maleimide-based conjugation strategy for Cys34 of HSA. Together, these attributes make the RAEs the promising leads to further develop in vitro and in vivo HSA bioconjugation strategies for numerous biomedical applications.
Collapse
Affiliation(s)
- Xingjian Yu
- Department
of Chemistry, University of California Davis, Davis, 95616California, United States,Department
of Biochemistry & Molecular Medicine, School of Medicine, University of California Davis, Sacramento, California95817, United States
| | - Ming Ruan
- Department
of Biochemistry & Molecular Medicine, School of Medicine, University of California Davis, Sacramento, California95817, United States,School
of Food Science, Nanjing Xiaozhuang University, Nanjing, 211171, Jiangsu, China
| | - Yongheng Wang
- Department
of Biochemistry & Molecular Medicine, School of Medicine, University of California Davis, Sacramento, California95817, United States,Department
of Biomedical Engineering, University of
California Davis, Davis, California95616, United States
| | - Audrey Nguyen
- Department
of Biochemistry & Molecular Medicine, School of Medicine, University of California Davis, Sacramento, California95817, United States
| | - Wenwu Xiao
- Department
of Biochemistry & Molecular Medicine, School of Medicine, University of California Davis, Sacramento, California95817, United States
| | - Yousif Ajena
- Department
of Biochemistry & Molecular Medicine, School of Medicine, University of California Davis, Sacramento, California95817, United States
| | - Lucas N. Solano
- Department
of Biochemistry & Molecular Medicine, School of Medicine, University of California Davis, Sacramento, California95817, United States
| | - Ruiwu Liu
- Department
of Biochemistry & Molecular Medicine, School of Medicine, University of California Davis, Sacramento, California95817, United States,
| | - Kit S Lam
- Department
of Biochemistry & Molecular Medicine, School of Medicine, University of California Davis, Sacramento, California95817, United States,
| |
Collapse
|
2
|
Dolan JP, Machin DC, Dedola S, Field RA, Webb ME, Turnbull WB. Synthesis of cholera toxin B subunit glycoconjugates using site-specific orthogonal oxime and sortase ligation reactions. Front Chem 2022; 10:958272. [PMID: 36186584 PMCID: PMC9515619 DOI: 10.3389/fchem.2022.958272] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 07/26/2022] [Indexed: 11/13/2022] Open
Abstract
The chemoenzymatic synthesis of a series of dual N- and C-terminal-functionalized cholera toxin B subunit (CTB) glycoconjugates is described. Mucin 1 peptides bearing different levels of Tn antigen glycosylation [MUC1(Tn)] were prepared via solid-phase peptide synthesis. Using sortase-mediated ligation, the MUC1(Tn) epitopes were conjugated to the C-terminus of CTB in a well-defined manner allowing for high-density display of the MUC1(Tn) epitopes. This work explores the challenges of using sortase-mediated ligation in combination with glycopeptides and the practical considerations to obtain high levels of conjugation. Furthermore, we describe methods to combine two orthogonal labeling methodologies, oxime- and sortase-mediated ligation, to expand the biochemical toolkit and produce dual N- and C-terminal-labeled conjugates.
Collapse
Affiliation(s)
- Jonathan P. Dolan
- School of Chemistry and Astbury Centre of Structural Biology, University of Leeds, Leeds, United Kingdom
| | - Darren C. Machin
- School of Chemistry and Astbury Centre of Structural Biology, University of Leeds, Leeds, United Kingdom
| | | | - Robert A. Field
- Iceni Glycoscience Ltd., Norwich, United Kingdom
- Department of Chemistry and Manchester Institute of Biotechnology, University of Manchester, Manchester, United Kingdom
| | - Michael E. Webb
- School of Chemistry and Astbury Centre of Structural Biology, University of Leeds, Leeds, United Kingdom
| | - W. Bruce Turnbull
- School of Chemistry and Astbury Centre of Structural Biology, University of Leeds, Leeds, United Kingdom
| |
Collapse
|
3
|
De Rosa L, Di Stasi R, Romanelli A, D’Andrea LD. Exploiting Protein N-Terminus for Site-Specific Bioconjugation. Molecules 2021; 26:3521. [PMID: 34207845 PMCID: PMC8228110 DOI: 10.3390/molecules26123521] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 06/07/2021] [Accepted: 06/07/2021] [Indexed: 11/29/2022] Open
Abstract
Although a plethora of chemistries have been developed to selectively decorate protein molecules, novel strategies continue to be reported with the final aim of improving selectivity and mildness of the reaction conditions, preserve protein integrity, and fulfill all the increasing requirements of the modern applications of protein conjugates. The targeting of the protein N-terminal alpha-amine group appears a convenient solution to the issue, emerging as a useful and unique reactive site universally present in each protein molecule. Herein, we provide an updated overview of the methodologies developed until today to afford the selective modification of proteins through the targeting of the N-terminal alpha-amine. Chemical and enzymatic strategies enabling the selective labeling of the protein N-terminal alpha-amine group are described.
Collapse
Affiliation(s)
- Lucia De Rosa
- Istituto di Biostrutture e Bioimmagini, CNR, Via Mezzocannone 16, 80134 Napoli, Italy; (L.D.R.); (R.D.S.)
| | - Rossella Di Stasi
- Istituto di Biostrutture e Bioimmagini, CNR, Via Mezzocannone 16, 80134 Napoli, Italy; (L.D.R.); (R.D.S.)
| | - Alessandra Romanelli
- Dipartimento di Scienze Farmaceutiche, Università Degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy;
| | - Luca Domenico D’Andrea
- Istituto di Scienze e Tecnologie Chimiche “Giulio Natta”, CNR Via M. Bianco 9, 20131 Milano, Italy
| |
Collapse
|