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dc.contributor.author
Bosio, Gabriela Natalia
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dc.contributor.author
Criado, Susana Noemi
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dc.contributor.author
Massad, Walter Alfredo
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dc.contributor.author
Rodríguez Nieto, Felipe Jorge
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dc.contributor.author
Gonzalez, Monica Cristina
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dc.contributor.author
Garcia, Norman Andino
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dc.contributor.author
Martire, Daniel Osvaldo
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dc.date.available
2024-08-06T11:41:59Z
dc.date.issued
2005-09
dc.identifier.citation
Bosio, Gabriela Natalia; Criado, Susana Noemi; Massad, Walter Alfredo; Rodríguez Nieto, Felipe Jorge; Gonzalez, Monica Cristina; et al.; Kinetics of the interaction of sulfate and hydrogen phosphate radicals with small peptides of glycine, alanine, tyrosine and tryptophan; Royal Society of Chemistry; Photochemical and Photobiological Sciences; 4; 10; 9-2005; 840-846
dc.identifier.issn
1474-905X
dc.identifier.uri
http://hdl.handle.net/11336/241842
dc.description.abstract
The kinetics and mechanism of the oxidation of Glycine (Gly), Alanine (Ala), Tyrosine (Tyr), Tryptophan (Trp) and some di-(Gly-Gly, Ala-Ala, Gly-Ala, Gly-Trp, Trp-Gly, Gly-Tyr, Tyr-Gly), tri-(Gly-Gly-Gly, Ala-Gly-Gly) and tetrapeptides (Gly-Gly-Gly-Gly) mediated by sulfate (SO44 •−) and hydrogen phosphate (HPO4−) and hydrogen phosphate (HPO4 •−) radicals was studied, employing the flash-photolysis technique. The substrates were found to react with sulfate radicals (SO4 employing the flash-photolysis technique. The substrates were found to react with sulfate radicals (SO4 −) radicals was studied, employing the flash-photolysis technique. The substrates were found to react with sulfate radicals (SO44 •−, produced by photolysis of the S2O8 2−) faster than with hydrogen phosphate radicals (HPO4 2−) faster than with hydrogen phosphate radicals (HPO4 by photolysis of the S2O8 2−) faster than with hydrogen phosphate radicals (HPO4 2−) faster than with hydrogen phosphate radicals (HPO4 −, produced by photolysis of the S2O8 2−) faster than with hydrogen phosphate radicals (HPO4 2−) faster than with hydrogen phosphate radicals (HPO4 2O8 2−) faster than with hydrogen phosphate radicals (HPO4−) faster than with hydrogen phosphate radicals (HPO4 •−, generated by photolysis of P2O8 4− 4− −, generated by photolysis of P2O8 4−− at pH = 7.1). The reactions of the zwitterions of the aliphatic amino acids and peptides with SO4= 7.1). The reactions of the zwitterions of the aliphatic amino acids and peptides with SO4 •− radicals take place by electron transfer from the carboxylate moiety to the inorganic radical, whereas those of the HPO4 by electron transfer from the carboxylate moiety to the inorganic radical, whereas those of the HPO4 − radicals take place by electron transfer from the carboxylate moiety to the inorganic radical, whereas those of the HPO44 •− proceed by H-abstraction from the a carbon atom. The phenoxyl radical of Tyr-Gly and Gly-Tyr are formed as intermediate species of the oxidation of these peptides by the inorganic radicals. The radical cations of Gly-Trp and Trp-Gly (at pH = 4.2) and their corresponding deprotonated forms (at pH = 7) were detected as intermediates species of the oxidation of these peptides with SO4 oxidation of these peptides with SO4 species of the oxidation of these peptides by the inorganic radicals. The radical cations of Gly-Trp and Trp-Gly (at pH = 4.2) and their corresponding deprotonated forms (at pH = 7) were detected as intermediates species of the oxidation of these peptides with SO4 oxidation of these peptides with SO4 H-abstraction from the a carbon atom. The phenoxyl radical of Tyr-Gly and Gly-Tyr are formed as intermediate species of the oxidation of these peptides by the inorganic radicals. The radical cations of Gly-Trp and Trp-Gly (at pH = 4.2) and their corresponding deprotonated forms (at pH = 7) were detected as intermediates species of the oxidation of these peptides with SO4 oxidation of these peptides with SO4 species of the oxidation of these peptides by the inorganic radicals. The radical cations of Gly-Trp and Trp-Gly (at pH = 4.2) and their corresponding deprotonated forms (at pH = 7) were detected as intermediates species of the oxidation of these peptides with SO4 oxidation of these peptides with SO4 − proceed by H-abstraction from the a carbon atom. The phenoxyl radical of Tyr-Gly and Gly-Tyr are formed as intermediate species of the oxidation of these peptides by the inorganic radicals. The radical cations of Gly-Trp and Trp-Gly (at pH = 4.2) and their corresponding deprotonated forms (at pH = 7) were detected as intermediates species of the oxidation of these peptides with SO4 oxidation of these peptides with SO4 species of the oxidation of these peptides by the inorganic radicals. The radical cations of Gly-Trp and Trp-Gly (at pH = 4.2) and their corresponding deprotonated forms (at pH = 7) were detected as intermediates species of the oxidation of these peptides with SO4 oxidation of these peptides with SO4 a carbon atom. The phenoxyl radical of Tyr-Gly and Gly-Tyr are formed as intermediate species of the oxidation of these peptides by the inorganic radicals. The radical cations of Gly-Trp and Trp-Gly (at pH = 4.2) and their corresponding deprotonated forms (at pH = 7) were detected as intermediates species of the oxidation of these peptides with SO4 oxidation of these peptides with SO4 = 4.2) and their corresponding deprotonated forms (at pH = 7) were detected as intermediates species of the oxidation of these peptides with SO44 •− and HPO4− and HPO4 •−. Reaction mechanisms which account for the observed intermediates are proposed. intermediates are proposed. −. Reaction mechanisms which account for the observed intermediates are proposed.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Royal Society of Chemistry
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
SULFATE RADICALS
dc.subject
GLYCINE
dc.subject
TRYPTOPHAN
dc.subject
TYROSINE
dc.subject.classification
Físico-Química, Ciencia de los Polímeros, Electroquímica
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dc.subject.classification
Ciencias Químicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Kinetics of the interaction of sulfate and hydrogen phosphate radicals with small peptides of glycine, alanine, tyrosine and tryptophan
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-08-06T11:14:01Z
dc.journal.volume
4
dc.journal.number
10
dc.journal.pagination
840-846
dc.journal.pais
Reino Unido
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dc.description.fil
Fil: Bosio, Gabriela Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
dc.description.fil
Fil: Criado, Susana Noemi. Universidad Nacional de Río Cuarto; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
dc.description.fil
Fil: Massad, Walter Alfredo. Universidad Nacional de Río Cuarto; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
dc.description.fil
Fil: Rodríguez Nieto, Felipe Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
dc.description.fil
Fil: Gonzalez, Monica Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
dc.description.fil
Fil: Garcia, Norman Andino. Universidad Nacional de Río Cuarto; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentina
dc.description.fil
Fil: Martire, Daniel Osvaldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina
dc.journal.title
Photochemical and Photobiological Sciences
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1039/b507856c
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1039/b507856c
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