| Texto completo | |
| Autor(es): |
Marques, Emerson Finco
;
Medeiros, Marisa H. G.
;
Di Mascio, Paolo
[1]
Número total de Autores: 3
|
| Afiliação do(s) autor(es): | [1] Univ Sao Paulo, Dept Bioquim, Inst Quim, BR-05508000 Sao Paulo, SP - Brazil
Número total de Afiliações: 1
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Mass Spectrometry; v. 52, n. 11, p. 739-751, NOV 2017. |
| Citações Web of Science: | 4 |
| Resumo | |
Singlet molecular oxygen (O-1(2)) is generated in biological systems and reacts with different biomolecules. Proteins are a major target for O-1(2), and His, Tyr, Met, Cys, and Trp are oxidized at physiological pH. In the present study, the modification of lysozyme protein by O-1(2) was investigated using mass spectrometry approaches. The experimental findings showed methionine, histidine, and tryptophan oxidation. The experiments were achieved using {[}O-18]-labeled O-1(2) released from thermolabile endoperoxides in association with nano-scale liquid chromatography coupled to electrospray ionization mass spectrometry. The structural characterization by nLC-MS/MS of the amino acids in the tryptic peptides of the proteins showed addition of {[}O-18]-labeling atoms in different amino acids. (AU) | |
| Processo FAPESP: | 12/12663-1 - Oxigênio singlete e peróxidos em química biológica |
| Beneficiário: | Paolo Di Mascio |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 13/07937-8 - Redoxoma |
| Beneficiário: | Ohara Augusto |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |