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Pathogenic Microbiology Commons

Open Access. Powered by Scholars. Published by Universities.®

2014

Discipline
Institution
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Articles 31 - 32 of 32

Full-Text Articles in Pathogenic Microbiology

A Glutathione-Independent Glyoxalase Of The Dj-1 Superfamily Plays An Important Role In Managing Metabolically Generated Methylglyoxal In Candida Albicans, Sahar Hasim, Nur Ahmad Hussin, Fadhel Alomar, Keshore R. Bidasee, Kenneth W. Nickerson, Mark A. Wilson Jan 2014

A Glutathione-Independent Glyoxalase Of The Dj-1 Superfamily Plays An Important Role In Managing Metabolically Generated Methylglyoxal In Candida Albicans, Sahar Hasim, Nur Ahmad Hussin, Fadhel Alomar, Keshore R. Bidasee, Kenneth W. Nickerson, Mark A. Wilson

Kenneth Nickerson Papers

Methylglyoxal is a cytotoxic reactive carbonyl compound produced by central metabolism. Dedicated glyoxalases convert methylglyoxal to D-lactate using multiple catalytic strategies. In this study, the DJ-1 superfamily member ORF 19.251/GLX3 from Candida albicans is shown to possess glyoxalase activity, making this the first demonstrated glutathione-independent glyoxalase in fungi. The crystal structure of Glx3p indicates that the protein is a monomer containing the catalytic triad Cys136- His137-Glu168. Purified Glx3p has an in vitro methylglyoxalase activity (Km = 5.5 mM andkcat = 7.8 s-1) that is significantly greater than that of …


Characterization Of The Effects Of Iron On Neisseria Gonorrhoeae Surface Protein Modulation And Host Cell Interactions, Aminat Oki Jan 2014

Characterization Of The Effects Of Iron On Neisseria Gonorrhoeae Surface Protein Modulation And Host Cell Interactions, Aminat Oki

Theses and Dissertations

Iron is an essential nutrient that is sequestered by iron-binding proteins in the human host resulting in a hostile environment for microbes. Neisseria gonorrhoeae, however, can utilize numerous iron-binding proteins such as transferrin and lactoferrin to acquire this nutrient. During initial infection, gonococci have access to transferrin and lactoferrin present in semen and vaginal fluids, as well as to hemoglobin present in blood during menses or disseminated infections. Consequently, the gonococcus likely encounters conditions of high iron at some stages in the course of natural infection. Potential contributions of iron to gonococcal invasion have however been largely over looked in …