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Crystallization and preliminary X-ray crystallographic studies of glutaredoxin 2 from Saccharomyces cerevisiae in different oxidation states.
Discola, Karen Fulan; Oliveira, Marcos Antonio de; Silva, Gustavo Monteiro; Barcena, José Antonio; Porras, Pablo; Padilla, Alicia; Netto, Luis Eduardo Soares; Guimarães, Beatriz Gomes.
Afiliação
  • Discola KF; Departamento de Biologia, Instituto de Biociências, Universidade de São Paulo, Rua do Matão 277, São Paulo, SP, Brazil.
Article em En | MEDLINE | ID: mdl-16511065
Glutaredoxins are small (9-12 kDa) heat-stable proteins that are highly conserved throughout evolution; the glutaredoxin active site (Cys-Pro-Tyr-Cys) is conserved in most species. Five glutaredoxin genes have been identified in Saccharomyces cerevisiae; however, Grx2 is responsible for the majority of oxidoreductase activity in the cell, suggesting that its primary function may be the detoxification of mixed disulfides generated by reactive oxygen species (ROS). Recombinant Grx2 was expressed in Escherichia coli as a 6xHis-tagged fusion protein and purified by nickel-affinity chromatography. Prior to crystallization trials, the enzyme was submitted to various treatments with reducing agents and peroxides. Crystals suitable for X-ray diffraction experiments were obtained from untreated protein and protein oxidized with t-butyl hydroperoxide (10 mM). Complete data sets were collected to resolutions 2.15 and 2.05 A for untreated and oxidized Grx2, respectively, using a synchrotron-radiation source. The crystals belong to space group P4(1)2(1)2, with similar unit-cell parameters.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Oxirredutases / Proteínas de Saccharomyces cerevisiae Idioma: En Revista: Acta Crystallogr Sect F Struct Biol Cryst Commun Ano de publicação: 2005 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Oxirredutases / Proteínas de Saccharomyces cerevisiae Idioma: En Revista: Acta Crystallogr Sect F Struct Biol Cryst Commun Ano de publicação: 2005 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido