Autor(es)

Melo-Braga, Marcella Nunes ; Carvalho, Milene Barbosa ; Ferreira, Manuela Cristina Emiliano ; Lavinder, Jason ; Abbasi, Abdolrahim ; Palmisano, Giuseppe ; Thaysen-Andersen, Morten ; Sajadi, Mohammad M. ; Ippolito, Gregory C. ; Felicori, Liza F.

• Tipo de documento: Artigo Científico
• Fonte: International Journal of Biological Macromolecules; v. 257, p. 15-pg., 2023-12-13.

Resumo

N-glycosylation at the antibody variable domain has emerged as an important modification influencing antibody function. Despite its significance, information regarding its role and regulation remains limited. To address this gap, we comprehensively explored antibody structures housing N-glycosylation within the Protein Data Bank, yielding fresh insights into this intricate landscape. Our findings revealed that among 208 structures, N-glycosylation was more prevalent in human and mouse antibodies containing IGHV1-8 and IGHV2-2 germline genes, respectively. Moreover, our research highlights the potential for somatic hypermutation to introduce N-glycosylation sites by substituting polar residues (Ser or Thr) in germline variable genes with asparagine. Notably, our study underscores the prevalence of N-glycosylation in antiviral antibodies, especially anti-HIV. Besides antigenantibody interaction, our findings suggest that N-glycosylation may impact antibody specificity, affinity, and avidity by influencing Fab dimer formation and complementary-determining region orientation. We also identified different glycan structures in HIV and SARS-CoV-2 antibody proteomic datasets, highlighting disparities from the N-glycan structures between PDB antibodies and biological repertoires further highlighting the complexity of N-glycosylation patterns. Our findings significantly enrich our understanding of the N-glycosylation's multifaceted characteristics within the antibody variable domain. Additionally, they underscore the pressing imperative for a more comprehensive characterization of its impact on antibody function. (AU)

• Processo FAPESP: 18/15549-1 - Modificações pós-traducionais nos processos biológicos e no diagnóstico da Doença de Chagas: novas abordagens metodológicas e implicações biológicas
• Beneficiário: Giuseppe Palmisano
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores - Fase 2
• Processo FAPESP: 20/04923-0 - Glicosilação do SARS-CoV-2 para identificação das características estruturais da COVID-19
• Beneficiário: Giuseppe Palmisano
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/18257-1 - EMU concedido no processo 14/06863-3: sistema de cromatografia líquida configurado para análise de carboidratos, aminoácidos, peptídeos e glicoproteínas
• Beneficiário: Giuseppe Palmisano
• Modalidade de apoio: Auxílio à Pesquisa - Programa Equipamentos Multiusuários