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Registro Completo |
Biblioteca(s): |
Embrapa Agricultura Digital. |
Data corrente: |
20/07/2018 |
Data da última atualização: |
07/01/2020 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SANTOS, R. V. dos; VILLALTA-ROMERO, F.; STANISIC, D.; BORRO, L.; NESHICH, G.; TASIC, L. |
Afiliação: |
RONEY VANDER DOS SANTOS, IQ/Unicamp; FABIAN VILLALTA-ROMERO, IQ/Unicamp, Instituto Tecnológico de Costa Rica; DANIJELA STANISIC, IQ/Unicamp; LUIZ BORRO, Unicamp, CNPTIA; GORAN NESIC, CNPTIA; LJUBICA TASIC, IQ/Unicamp. |
Título: |
Citrus bioflavonoid, hesperetin, as inhibitor of two thrombin-like snake venom serine proteases isolated from Crotalus simus. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
Toxicon, v. 143, p. 36-43, Mar. 2018. |
DOI: |
https://doi.org/10.1016/j.toxicon.2018.01.005 |
Idioma: |
Inglês |
Conteúdo: |
Around 5.5 million people suffer from snakebites per year, with about 400,000 cases with some type of sequelae, such as amputation, and 20,000 to 125,000 cases with the fatal end. Usually, the victim outcome depends on correct, agile and many times in situ intervention based on the proper identification of the snake venom type and its potential effects, among other factors. Therefore, knowledge on the snake venom composition and a research on inhibitors of snake venom target components might ameliorate envenoming dangerous outcome. Herein, two thrombin-like serine proteases from the Crotalus simus snake venom - SVSP1 and SVSP2 - were isolated in two chromatographic steps, using gel filtration and then RP-HPLC. They showed molecular masses of around 31.3 and 24.6 kDa, respectively, and mostly b-sheet secondary structure features. The SVSP1 and SVSP2 were sequenced using tandem mass spectrometry (Q-TOF). Using the known serine protease structure (PDB entry: 4e7n), which was evaluated as homologous to the two target proteins, in silico docking results showed that hesperetin is its excellent inhibitor. Using in vitro tests with the commercial hesperetin, kinetic parameters were obtained for SVSPs against the synthetic substrate BApNA. Obtained results pointed that hesperetin might act as an uncompetitive (SVSP1) or mixed (SVSP2) inhibitor. Also, the fluorescence quenching upon inhibition was observed, as well as, red shift in maximums of around 20 nm, which indicate that the tryptophan residues in the target enzymes suffered conformational changes caused by hesperetin binding. Thus, a naturally occurring flavone that can easily be extracted from oranges might serve as low-cost inhibitor of the investigated snake venom proteases. MenosAround 5.5 million people suffer from snakebites per year, with about 400,000 cases with some type of sequelae, such as amputation, and 20,000 to 125,000 cases with the fatal end. Usually, the victim outcome depends on correct, agile and many times in situ intervention based on the proper identification of the snake venom type and its potential effects, among other factors. Therefore, knowledge on the snake venom composition and a research on inhibitors of snake venom target components might ameliorate envenoming dangerous outcome. Herein, two thrombin-like serine proteases from the Crotalus simus snake venom - SVSP1 and SVSP2 - were isolated in two chromatographic steps, using gel filtration and then RP-HPLC. They showed molecular masses of around 31.3 and 24.6 kDa, respectively, and mostly b-sheet secondary structure features. The SVSP1 and SVSP2 were sequenced using tandem mass spectrometry (Q-TOF). Using the known serine protease structure (PDB entry: 4e7n), which was evaluated as homologous to the two target proteins, in silico docking results showed that hesperetin is its excellent inhibitor. Using in vitro tests with the commercial hesperetin, kinetic parameters were obtained for SVSPs against the synthetic substrate BApNA. Obtained results pointed that hesperetin might act as an uncompetitive (SVSP1) or mixed (SVSP2) inhibitor. Also, the fluorescence quenching upon inhibition was observed, as well as, red shift in maximums of around 20 nm, which indicate that the try... Mostrar Tudo |
Palavras-Chave: |
Análise in silico; Análise in vitro; Crotalus simus; Inibição enzimática; Snake venom serine proteases; Veneno de cobra. |
Thesaurus Nal: |
Enzyme inhibition; Hesperetin. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 02656naa a2200289 a 4500 001 2093443 005 2020-01-07 008 2018 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.toxicon.2018.01.005$2DOI 100 1 $aSANTOS, R. V. dos 245 $aCitrus bioflavonoid, hesperetin, as inhibitor of two thrombin-like snake venom serine proteases isolated from Crotalus simus.$h[electronic resource] 260 $c2018 520 $aAround 5.5 million people suffer from snakebites per year, with about 400,000 cases with some type of sequelae, such as amputation, and 20,000 to 125,000 cases with the fatal end. Usually, the victim outcome depends on correct, agile and many times in situ intervention based on the proper identification of the snake venom type and its potential effects, among other factors. Therefore, knowledge on the snake venom composition and a research on inhibitors of snake venom target components might ameliorate envenoming dangerous outcome. Herein, two thrombin-like serine proteases from the Crotalus simus snake venom - SVSP1 and SVSP2 - were isolated in two chromatographic steps, using gel filtration and then RP-HPLC. They showed molecular masses of around 31.3 and 24.6 kDa, respectively, and mostly b-sheet secondary structure features. The SVSP1 and SVSP2 were sequenced using tandem mass spectrometry (Q-TOF). Using the known serine protease structure (PDB entry: 4e7n), which was evaluated as homologous to the two target proteins, in silico docking results showed that hesperetin is its excellent inhibitor. Using in vitro tests with the commercial hesperetin, kinetic parameters were obtained for SVSPs against the synthetic substrate BApNA. Obtained results pointed that hesperetin might act as an uncompetitive (SVSP1) or mixed (SVSP2) inhibitor. Also, the fluorescence quenching upon inhibition was observed, as well as, red shift in maximums of around 20 nm, which indicate that the tryptophan residues in the target enzymes suffered conformational changes caused by hesperetin binding. Thus, a naturally occurring flavone that can easily be extracted from oranges might serve as low-cost inhibitor of the investigated snake venom proteases. 650 $aEnzyme inhibition 650 $aHesperetin 653 $aAnálise in silico 653 $aAnálise in vitro 653 $aCrotalus simus 653 $aInibição enzimática 653 $aSnake venom serine proteases 653 $aVeneno de cobra 700 1 $aVILLALTA-ROMERO, F. 700 1 $aSTANISIC, D. 700 1 $aBORRO, L. 700 1 $aNESHICH, G. 700 1 $aTASIC, L. 773 $tToxicon$gv. 143, p. 36-43, Mar. 2018.
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Embrapa Agricultura Digital (CNPTIA) |
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Registro Completo
Biblioteca(s): |
Embrapa Hortaliças. |
Data corrente: |
28/01/2016 |
Data da última atualização: |
01/02/2016 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
MACHADO, E. R.; GINANI, V. C.; MENDES, V. da S.; OLIVEIRA, R. A. de; RIQUETTE, R.; GURGEL-GONÇALVES, R.; MALDONADE, I. R. |
Afiliação: |
ELEUZA RODRIGUES MACHADO; VERÔNICA CORTEZ GINANI; VINÍCIOS DA SILVEIRA MENDES; RAYLENE ANDRADE DE OLIVEIRA; ROBERTA RIQUETTE; RODRIGO GURGEL- GONÇALVES.; IRIANI RODRIGUES MALDONADE, CNPH. |
Título: |
Inquérito nacional de enteroparasitos em hortaliças folhosas minimamente processadas. |
Ano de publicação: |
2015 |
Fonte/Imprenta: |
In: CONGRESSO DA SOCIEDADE BRASILEIRA DE PARASITOLOGIA, 24.; CONGRESSO LATINOAMERICANO DE PARASITOLOGIA, 23., 2015, Salvador. Parasitologia: passado, presente, futuro: resumos dos pôsteres. Goiânia: SBP: FLAP, 2015. |
Páginas: |
p. 580. |
Idioma: |
Português |
Notas: |
Poster 311. |
Conteúdo: |
O objetivo deste trabalho é verificar no contexto nacional o grau de contaminação de 20 variedades de hortaliças folhosas minimente processadas (FLV) por enteroparasitos. |
Thesagro: |
Higiene de alimento; Hortaliça folhosa; Parasito. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/138026/1/ANAIS-DE-RESUMOS-Iriani-p-311.pdf
|
Marc: |
LEADER 01050nam a2200241 a 4500 001 2035529 005 2016-02-01 008 2015 bl uuuu u00u1 u #d 100 1 $aMACHADO, E. R. 245 $aInquérito nacional de enteroparasitos em hortaliças folhosas minimamente processadas.$h[electronic resource] 260 $aIn: CONGRESSO DA SOCIEDADE BRASILEIRA DE PARASITOLOGIA, 24.; CONGRESSO LATINOAMERICANO DE PARASITOLOGIA, 23., 2015, Salvador. Parasitologia: passado, presente, futuro: resumos dos pôsteres. Goiânia: SBP: FLAP$c2015 300 $ap. 580. 500 $aPoster 311. 520 $aO objetivo deste trabalho é verificar no contexto nacional o grau de contaminação de 20 variedades de hortaliças folhosas minimente processadas (FLV) por enteroparasitos. 650 $aHigiene de alimento 650 $aHortaliça folhosa 650 $aParasito 700 1 $aGINANI, V. C. 700 1 $aMENDES, V. da S. 700 1 $aOLIVEIRA, R. A. de 700 1 $aRIQUETTE, R. 700 1 $aGURGEL-GONÇALVES, R. 700 1 $aMALDONADE, I. R.
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