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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Aromatic thiol-mediated cleavage of N-O bonds enables chemical ubiquitylation of folded proteins

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Autor(es):
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Weller, Caroline E. ; Dhall, Abhinav ; Ding, Feizhi ; Linares, Edlaine ; Whedon, Samuel D. ; Senger, Nicholas A. ; Tyson, Elizabeth L. ; Bagert, John D. ; Li, Xiaosong ; Augusto, Ohara ; Chatterjee, Champak
Número total de Autores: 11
Tipo de documento: Artigo Científico
Fonte: NATURE COMMUNICATIONS; v. 7, SEP 29 2016.
Citações Web of Science: 17
Resumo

Access to protein substrates homogenously modified by ubiquitin (Ub) is critical for biophysical and biochemical investigations aimed at deconvoluting the myriad biological roles for Ub. Current chemical strategies for protein ubiquitylation, however, employ temporary ligation auxiliaries that are removed under harsh denaturing conditions and have limited applicability. We report an unprecedented aromatic thiol-mediated N-O bond cleavage and its application towards native chemical ubiquitylation with the ligation auxiliary 2-aminooxyethanethiol. Our interrogation of the reaction mechanism suggests a disulfide radical anion as the active species capable of cleaving the N-O bond. The successful semisynthesis of full-length histone H2B modified by the small ubiquitin-like modifier-3 (SUMO-3) protein further demonstrates the generalizability and compatibility of our strategy with folded proteins. (AU)

Processo FAPESP: 13/07937-8 - Redoxoma
Beneficiário:Ohara Augusto
Linha de fomento: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs