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Articles 31 - 36 of 36
Full-Text Articles in Chemicals and Drugs
Modification Of The Ribosome As Part Of The Adaptive Response To Oxidative Stress In Yeast, Jessica A Zinskie, Daniel Shedlovskiy, Ethan Gardner, Dimitri G Pestov, Natalia Shcherbik
Modification Of The Ribosome As Part Of The Adaptive Response To Oxidative Stress In Yeast, Jessica A Zinskie, Daniel Shedlovskiy, Ethan Gardner, Dimitri G Pestov, Natalia Shcherbik
Rowan-Virtua School of Osteopathic Medicine Departmental Research
Living organisms are constantly exposed to a variety of environmental and internal stressors tha tare detrimental to their cellular physiology and viability. One such condition, oxidativestress, is caused by abnormal amounts of Reactive Oxygen Species (ROS) that can lead to damage to proteins, nucleic acids, and lipids. Although the mechanisms to neutralize ROS have been widely studied, the understanding of ROS‐mediated signaling for these mechanisms is rather incomplete and sparse. We have uncovered a previously undescribed phenomenon of yeast ribosomes to respond to elevated levels of ROS through a specific endonucleolytic cleavage of the 25S rRNA in the c‐loop of …
The Development Of A Comprehensive Antifungal Susceptibility Testing Assay For Vulvovaginal Candidiasis Therapy, David Hardaker
The Development Of A Comprehensive Antifungal Susceptibility Testing Assay For Vulvovaginal Candidiasis Therapy, David Hardaker
Graduate School of Biomedical Sciences Theses and Dissertations
Vulvovaginal candidiasis is the most common fungal infection of the female urogenital tract, commonly caused by Candida albicans and C. glabrata. However, treatment can be difficult when caused by non-albicans strains due to resistance to the oral antifungal drug fluconazole. The mechanism through which strains of Candida, particularly C. glabrata, develop resistance to different antifungal classes has not been completely characterized. The ergosterol biosynthesis pathway, an important component of the cell membrane, is the major target of antifungals such as fluconazole, an inhibitor of the ERG 11 gene. Current research shows that an upregulation of specific genes in C. glabrata …
Molecular Chaperone Tools For Use Against Neurodegenerative Diseases, Matthew Tinkham
Molecular Chaperone Tools For Use Against Neurodegenerative Diseases, Matthew Tinkham
Senior Honors Projects
A noted characteristic found in several neurodegenerative disorders, including Alzheimer’s Disease, Parkinson’s Disease, Huntington’s Disease and bovine spongiform encephalopathy, is the accumulation of amyloid plaques in the brain. Amyloid plaques contain deposits of fibrillar aggregates of misfolded proteins that disrupt normal functionality in neurons. Certain variants of these misfolded proteins are self-replicating; these self-replicating amyloids are termed prions (for infectious protein). We are interested in how protein misfolding contributes to amyloid formation and how molecular chaperone proteins can change the formation of amyloid deposits. Chaperone proteins function by catalyzing the proper folding of other proteins, the refolding of misfolded proteins, …
Functional Interplay Between Chromatin Remodeling Complexes Rsc, Swi/Snf And Iswi In Regulation Of Yeast Heat Shock Genes, Tamara Y. Erkina, Y. Zou, S. Freeling, V. I. Vorobyev, Alexander M. Erkine
Functional Interplay Between Chromatin Remodeling Complexes Rsc, Swi/Snf And Iswi In Regulation Of Yeast Heat Shock Genes, Tamara Y. Erkina, Y. Zou, S. Freeling, V. I. Vorobyev, Alexander M. Erkine
Scholarship and Professional Work – COPHS
Chromatin remodeling is an essential part of transcription initiation. We show that at heat shock gene promoters functional interactions between individual ATP-dependent chromatin remodeling complexes play critical role in both nucleosome displacement and Pol II recruitment. Using HSP12, HSP82 and SSA4 gene promoters as reporters, we demonstrated that while inactivation of SNF2, a critical ATPase of the SWI/SNF complex, primarily affects the HSP12 promoter, depletion of STH1- a SNF2 homolog from the RSC complex reduces histone displacement and abolishes the Pol II recruitment at all three promoters. From these results, we conclude that redundancy between SWI/SNF and RSC complexes …
Different Requirements Of The Swi/Snf Complex For Robust Nucleosome Displacement At Promoters Of Heat Shock Factor And Msn2- And Msn4-Regulated Heat Shock Genes, Tamara Y. Erkina, P. A. Tschetter, Alexander M. Erkine
Different Requirements Of The Swi/Snf Complex For Robust Nucleosome Displacement At Promoters Of Heat Shock Factor And Msn2- And Msn4-Regulated Heat Shock Genes, Tamara Y. Erkina, P. A. Tschetter, Alexander M. Erkine
Scholarship and Professional Work – COPHS
The stress response in yeast cells is regulated by at least two classes of transcription activators—HSF and Msn2/4, which differentially affect promoter chromatin remodeling. We demonstrate that the deletion of SNF2, an ATPase activity-containing subunit of the chromatin remodeling SWI/SNF complex, eliminates histone displacement, RNA polymerase II recruitment, and heat shock factor (HSF) binding at the HSP12 promoter while delaying these processes at the HSP82 and SSA4 promoters. Out of the three promoters, the double deletion of MSN2 and MSN4 eliminates both chromatin remodeling and HSF binding only at the HSP12 promoter, suggesting that Msn2/4 activators are primary determinants of …
A Rapid And Simple Method For Preparation Of Rna From Saccharomyces Cerevisiae, Mark E. Schmitt, Timothy A. Brown, Bernard L. Trumpower
A Rapid And Simple Method For Preparation Of Rna From Saccharomyces Cerevisiae, Mark E. Schmitt, Timothy A. Brown, Bernard L. Trumpower
Dartmouth Scholarship
Most methods for isolation of RNA from yeast require tedious vortexing with glass beads, and give low yields when scaled down to 10 ml cultures (1). In addition, it is frequently desirable to prepare RNA from several different yeast strains grown under a variety of growth conditions, and preparations using glass beads are impractical when dealing with multiple samples.