Enterococcus faecalis glutathione reductase: purification, characterization and expression under normal and hyperbaric O2 conditions

Mehul P. Patel, Jovita Marcinkeviciene, John S. Blanchard

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Glutathione reductase is found ubiquitously in eukaryotes and Gram-negative bacteria, and plays a significant role in bacterial defense against oxidative stress. Glutathione reductase from the Gram-positive bacterium Enterococcus faecalis was purified to homogeneity using anion exchange, hydrophobic interaction, and affinity chromatography. The homogeneous 49-kDa enzyme contained 1 mol bound FAD per subunit. The determined N-terminal amino acid sequence of the E. faecalis enzyme displays significant identity with glutathione reductases from other Gram-negative and Gram-positive bacteria, as well as yeast and human erythrocyte reductases. The kinetic mechanism is ping-pong, and the determined kinetic parameters exhibited by the E. faecalis glutathione reductase are similar to those found for glutathione reductases from yeast, Escherichia coli, and human erythrocyte. A two-fold increased expression of glutathione reductase activity and a three-fold induction of glutathione peroxidase activity were observed under hyperbaric O2 growth conditions without a corresponding change in the total glutathione and soluble thiol content. The difference in the expression of the enzyme, and its cognate substrate's intracellular concentration, under these conditions suggest that the gene encoding glutathione reductase is responsive to oxygen concentration, but that the genes encoding the glutathione synthesizing enzymes are not linked to an oxygen-sensitive promoter. Copyright (C) 1998 Federation of European Microbiological Societies.

Original languageEnglish (US)
Pages (from-to)155-163
Number of pages9
JournalFEMS Microbiology Letters
Volume166
Issue number1
DOIs
StatePublished - Sep 1 1998

Fingerprint

Glutathione Reductase
Enterococcus faecalis
Gram-Positive Bacteria
Enzymes
Glutathione
Yeasts
Erythrocytes
Oxygen
Flavin-Adenine Dinucleotide
Glutathione Peroxidase
Eukaryota
Gram-Negative Bacteria
Hydrophobic and Hydrophilic Interactions
Affinity Chromatography
Sulfhydryl Compounds
Genes
Anions
Amino Acid Sequence
Oxidoreductases
Oxidative Stress

Keywords

  • Enterococcus faecalis
  • Glutathione reductase
  • Oxidative stress
  • Thiol content

ASJC Scopus subject areas

  • Genetics
  • Molecular Biology
  • Applied Microbiology and Biotechnology
  • Microbiology

Cite this

Enterococcus faecalis glutathione reductase : purification, characterization and expression under normal and hyperbaric O2 conditions. / Patel, Mehul P.; Marcinkeviciene, Jovita; Blanchard, John S.

In: FEMS Microbiology Letters, Vol. 166, No. 1, 01.09.1998, p. 155-163.

Research output: Contribution to journalArticle

@article{5cf6c12c7d684ccb9c1f99b8930f0cf2,
title = "Enterococcus faecalis glutathione reductase: purification, characterization and expression under normal and hyperbaric O2 conditions",
abstract = "Glutathione reductase is found ubiquitously in eukaryotes and Gram-negative bacteria, and plays a significant role in bacterial defense against oxidative stress. Glutathione reductase from the Gram-positive bacterium Enterococcus faecalis was purified to homogeneity using anion exchange, hydrophobic interaction, and affinity chromatography. The homogeneous 49-kDa enzyme contained 1 mol bound FAD per subunit. The determined N-terminal amino acid sequence of the E. faecalis enzyme displays significant identity with glutathione reductases from other Gram-negative and Gram-positive bacteria, as well as yeast and human erythrocyte reductases. The kinetic mechanism is ping-pong, and the determined kinetic parameters exhibited by the E. faecalis glutathione reductase are similar to those found for glutathione reductases from yeast, Escherichia coli, and human erythrocyte. A two-fold increased expression of glutathione reductase activity and a three-fold induction of glutathione peroxidase activity were observed under hyperbaric O2 growth conditions without a corresponding change in the total glutathione and soluble thiol content. The difference in the expression of the enzyme, and its cognate substrate's intracellular concentration, under these conditions suggest that the gene encoding glutathione reductase is responsive to oxygen concentration, but that the genes encoding the glutathione synthesizing enzymes are not linked to an oxygen-sensitive promoter. Copyright (C) 1998 Federation of European Microbiological Societies.",
keywords = "Enterococcus faecalis, Glutathione reductase, Oxidative stress, Thiol content",
author = "Patel, {Mehul P.} and Jovita Marcinkeviciene and Blanchard, {John S.}",
year = "1998",
month = "9",
day = "1",
doi = "10.1016/S0378-1097(98)00325-5",
language = "English (US)",
volume = "166",
pages = "155--163",
journal = "FEMS Microbiology Letters",
issn = "0378-1097",
publisher = "Wiley-Blackwell",
number = "1",

}

TY - JOUR

T1 - Enterococcus faecalis glutathione reductase

T2 - purification, characterization and expression under normal and hyperbaric O2 conditions

AU - Patel, Mehul P.

AU - Marcinkeviciene, Jovita

AU - Blanchard, John S.

PY - 1998/9/1

Y1 - 1998/9/1

N2 - Glutathione reductase is found ubiquitously in eukaryotes and Gram-negative bacteria, and plays a significant role in bacterial defense against oxidative stress. Glutathione reductase from the Gram-positive bacterium Enterococcus faecalis was purified to homogeneity using anion exchange, hydrophobic interaction, and affinity chromatography. The homogeneous 49-kDa enzyme contained 1 mol bound FAD per subunit. The determined N-terminal amino acid sequence of the E. faecalis enzyme displays significant identity with glutathione reductases from other Gram-negative and Gram-positive bacteria, as well as yeast and human erythrocyte reductases. The kinetic mechanism is ping-pong, and the determined kinetic parameters exhibited by the E. faecalis glutathione reductase are similar to those found for glutathione reductases from yeast, Escherichia coli, and human erythrocyte. A two-fold increased expression of glutathione reductase activity and a three-fold induction of glutathione peroxidase activity were observed under hyperbaric O2 growth conditions without a corresponding change in the total glutathione and soluble thiol content. The difference in the expression of the enzyme, and its cognate substrate's intracellular concentration, under these conditions suggest that the gene encoding glutathione reductase is responsive to oxygen concentration, but that the genes encoding the glutathione synthesizing enzymes are not linked to an oxygen-sensitive promoter. Copyright (C) 1998 Federation of European Microbiological Societies.

AB - Glutathione reductase is found ubiquitously in eukaryotes and Gram-negative bacteria, and plays a significant role in bacterial defense against oxidative stress. Glutathione reductase from the Gram-positive bacterium Enterococcus faecalis was purified to homogeneity using anion exchange, hydrophobic interaction, and affinity chromatography. The homogeneous 49-kDa enzyme contained 1 mol bound FAD per subunit. The determined N-terminal amino acid sequence of the E. faecalis enzyme displays significant identity with glutathione reductases from other Gram-negative and Gram-positive bacteria, as well as yeast and human erythrocyte reductases. The kinetic mechanism is ping-pong, and the determined kinetic parameters exhibited by the E. faecalis glutathione reductase are similar to those found for glutathione reductases from yeast, Escherichia coli, and human erythrocyte. A two-fold increased expression of glutathione reductase activity and a three-fold induction of glutathione peroxidase activity were observed under hyperbaric O2 growth conditions without a corresponding change in the total glutathione and soluble thiol content. The difference in the expression of the enzyme, and its cognate substrate's intracellular concentration, under these conditions suggest that the gene encoding glutathione reductase is responsive to oxygen concentration, but that the genes encoding the glutathione synthesizing enzymes are not linked to an oxygen-sensitive promoter. Copyright (C) 1998 Federation of European Microbiological Societies.

KW - Enterococcus faecalis

KW - Glutathione reductase

KW - Oxidative stress

KW - Thiol content

UR - http://www.scopus.com/inward/record.url?scp=0031656590&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031656590&partnerID=8YFLogxK

U2 - 10.1016/S0378-1097(98)00325-5

DO - 10.1016/S0378-1097(98)00325-5

M3 - Article

C2 - 9741094

AN - SCOPUS:0031656590

VL - 166

SP - 155

EP - 163

JO - FEMS Microbiology Letters

JF - FEMS Microbiology Letters

SN - 0378-1097

IS - 1

ER -