Design, synthesis, and evaluation of peptide-imidazo[1,2-a]pyrazine bioconjugates as potential bivalent inhibitors of the VirB11 ATPase HP0525
| Autor: | Gabriel Waksman, James Sayer, Tina Daviter, Helen Allan, Alethea B. Tabor, Hans Koss, Karin Walldén, Paul J. Gane |
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| Rok vydání: | 2021 |
| Předmět: |
Pyrazine
Protein subunit Peptide Random hexamer 010402 general chemistry 01 natural sciences Biochemistry Bivalent (genetics) chemistry.chemical_compound Bacterial Proteins Structural Biology Drug Discovery Molecular Biology Pharmacology chemistry.chemical_classification Adenosine Triphosphatases Bioconjugation Helicobacter pylori 010405 organic chemistry Organic Chemistry General Medicine 0104 chemical sciences chemistry Docking (molecular) Pyrazines Click chemistry Molecular Medicine Peptides |
| Zdroj: | Journal of peptide science : an official publication of the European Peptide SocietyREFERENCES. 27(10) |
| ISSN: | 1099-1387 |
| Popis: | Helicobacter pylori (H. pylori) infections have been implicated in the development of gastric ulcers and various cancers: however, the success of current therapies is compromised by rising antibiotic resistance. The virulence and pathogenicity of H. pylori is mediated by the type IV secretion system (T4SS), a multiprotein macromolecular nanomachine that transfers toxic bacterial factors and plasmid DNA between bacterial cells, thus contributing to the spread of antibiotic resistance. A key component of the T4SS is the VirB11 ATPase HP0525, which is a hexameric protein assembly. We have previously reported the design and synthesis of a series of novel 8-amino imidazo[1,2-a]pyrazine derivatives as inhibitors of HP0525. In order to improve their selectivity, and potentially develop these compounds as tools for probing the assembly of the HP0525 hexamer, we have explored the design and synthesis of potential bivalent inhibitors. We used the structural details of the subunit-subunit interactions within the HP0525 hexamer to design peptide recognition moieties of the subunit interface. Different methods (cross metathesis, click chemistry, and cysteine-malemide) for bioconjugation to selected 8-amino imidazo[1,2-a]pyrazines were explored, as well as peptides spanning larger or smaller regions of the interface. The IC50 values of the resulting linker-8-amino imidazo[1,2-a]pyrazine derivatives, and the bivalent inhibitors, were related to docking studies with the HP0525 crystal structure and to molecular dynamics simulations of the peptide recognition moieties. |
| Databáze: | OpenAIRE |
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