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Articles 61 - 71 of 71
Full-Text Articles in Biotechnology
The Role Of Coa2 In Hemylation Of Yeast Cox1 Revealed By Its Genetic Interaction With Cox10, Megan Bestwick, Oleh Khalimonchuk, Fabien Pierrel, Dennis R. Winge
The Role Of Coa2 In Hemylation Of Yeast Cox1 Revealed By Its Genetic Interaction With Cox10, Megan Bestwick, Oleh Khalimonchuk, Fabien Pierrel, Dennis R. Winge
Department of Biochemistry: Faculty Publications
Saccharomyces cerevisiae cells lacking the cytochrome c oxidase (CcO) assembly factor Coa2 are impaired in Cox1 maturation and exhibit a rapid degradation of newly synthesized Cox1. The respiratory deficiency of coa2 Δ cells is suppressed either by the presence of a mutant allele of the Cox10 farnesyl transferase involved in heme a biosynthesis or through impaired proteolysis by the disruption of the mitochondrial Oma1 protease. Cox10 with an N196K substitution functions as a robust gain-of-function suppressor of the respiratory deficiency of coa2 Δ cells but lacks suppressor activity for two other CcO assembly mutant strains, the coa1 Δ and shy1 …
Quantitative Nuclear Proteomics Identifies Mtor Regulation Of Dna Damage Response, Sricharan Bandhakavi, Young-Mi Kim, Seung-Hyun Ro, Hongwei Xie, Getiria Onsongo, Chang-Bong Jun, Do-Hyung Kim, Timothy J. Griffin
Quantitative Nuclear Proteomics Identifies Mtor Regulation Of Dna Damage Response, Sricharan Bandhakavi, Young-Mi Kim, Seung-Hyun Ro, Hongwei Xie, Getiria Onsongo, Chang-Bong Jun, Do-Hyung Kim, Timothy J. Griffin
Department of Biochemistry: Faculty Publications
Cellular nutritional and energy status regulates a wide range of nuclear processes important for cell growth, survival, and metabolic homeostasis. Mammalian target of rapamycin (mTOR) plays a key role in the cellular responses to nutrients. However, the nuclear processes governed by mTOR have not been clearly defined. Using isobaric peptide tagging coupled with linear ion trap mass spectrometry, we performed quantitative proteomics analysis to identify nuclear processes in human cells under control of mTOR. Within 3 h of inhibiting mTOR with rapamycin in HeLa cells, we observed downregulation of nuclear abundance of many proteins involved in translation and RNA modification. …
Methanogenesis By Methanosarcina Acetivorans Involves Two Structurally And Functionally Distinct Classes Of Heterodisulfide Reductase, Nicole R. Buan, William W. Metcalf
Methanogenesis By Methanosarcina Acetivorans Involves Two Structurally And Functionally Distinct Classes Of Heterodisulfide Reductase, Nicole R. Buan, William W. Metcalf
Department of Biochemistry: Faculty Publications
Biochemical studies have revealed two distinct classes of Coenzyme B-Coenzyme M heterodisulfide (CoB-S-S-CoM) reductase (Hdr), a key enzyme required for anaerobic respiration in methaneproducing archaea. A cytoplasmic HdrABC enzyme complex is found in most methanogens, whereas a membrane-bound HdrED complex is found exclusively in members of the order Methanosarcinales. Unexpectedly, genomic data indicate that multiple copies of both Hdr classes are found in all sequenced Methanosarcinales genomes. The Methanosarcina acetivorans hdrED1 operon is constitutively expressed and required for viability under all growth conditions examined, consistent with HdrED being the primary Hdr. HdrABC appears to be specifically involved in methylotrophic …
Transgenic Rat Model Of Neurodegeneration Caused By Mutation In The Tdp Gene, Hongxia Zhou, Cao Huang, Han Chen, Dian Wang, Carlisle P. Landel, Pedro Yuxing Xia, Robert Bowser, Yong-Jian Liu, Xu Gang Xia
Transgenic Rat Model Of Neurodegeneration Caused By Mutation In The Tdp Gene, Hongxia Zhou, Cao Huang, Han Chen, Dian Wang, Carlisle P. Landel, Pedro Yuxing Xia, Robert Bowser, Yong-Jian Liu, Xu Gang Xia
Nebraska Center for Biotechnology: Faculty and Staff Publications
TDP-43 proteinopathies have been observed in a wide range of neurodegenerative diseases. Mutations in the gene encoding TDP-43 (i.e., TDP) have been identified in amyotrophic lateral sclerosis (ALS) and in frontotemporal lobe degeneration associated with motor neuron disease. To study the consequences of TDP mutation in an intact system, we created transgenic rats expressing normal human TDP or a mutant form of human TDP with a M337V substitution. Overexpression of mutant, but not normal, TDP caused widespread neurodegeneration that predominantly affected the motor system. TDP mutation reproduced ALS phenotypes in transgenic rats, as seen by progressive degeneration of motor neurons …
Low Cost Production Of Proinsulin In Tobacco And Lettuce Chloroplasts For Injectable Or Oral Delivery Of Functional Insulin And, Diane Burberry
Low Cost Production Of Proinsulin In Tobacco And Lettuce Chloroplasts For Injectable Or Oral Delivery Of Functional Insulin And, Diane Burberry
Electronic Theses and Dissertations
Current treatment for type I diabetes includes delivery of insulin via injection or pump, which is highly invasive and expensive. The production of chloroplast-derived proinsulin should reduce cost and facilitate oral delivery. Therefore, tobacco and lettuce chloroplasts were transformed with the cholera toxin B subunit fused with human proinsulin (A, B, and C peptides) containing three furin cleavage sites (CTB-PFx3). Transplastomic lines were confirmed for site-specific integration of transgene and homoplasmy. Old tobacco leaves accumulated proinsulin up to 47% of total leaf protein (TLP). Old lettuce leaves accumulated proinsulin up to 53% TLP. Accumulation was so stable that up to …
Acetazolamide-Induced Decrease Of Apical Fluid Flow In Choroid Plexus Is Independent Of The Concomitant Changes In Aquaporin-1 Expression, Pouya Alexander Ameli
Acetazolamide-Induced Decrease Of Apical Fluid Flow In Choroid Plexus Is Independent Of The Concomitant Changes In Aquaporin-1 Expression, Pouya Alexander Ameli
Electronic Theses and Dissertations
Acetazolamide (AZA), the only drug approved for treatment of hydrocephalus, is effective in only 25-30% of patients while its effect on fluid flow in the choroid plexus (CP) is unknown. The drug reversibly inhibits Aquaporin 4 (AQP4), the most highly expressed „water pore‟ in the brain, and it is postulated that it reduces cerebrospinal fluid (CSF) production by modulating AQP1 (mostly found in the apical membrane of the CP). In this study, we sought to elucidate the effect of AZA on AQP1 and fluid flow in CP. Primary CP culture from p10 Sprague-Dawley rats and TRCSF-B cell line were grown …
Adsorption Of Lead (Ii) By A Non-Living Algal Biomass., Mudher A. Hussein
Adsorption Of Lead (Ii) By A Non-Living Algal Biomass., Mudher A. Hussein
Student Works (2010-2019)
Conventional techniques for removing dissolved heavy metals are only practical and cost-effective when applied to high strength wastes with heavy metal ion concentrations greater than 100 ppm. The possibility of using a non-living algal biomass to solve this problem was studied. Lead(II) was used in this study because it has been reported to cause several disorders in human. The non-living algal biomass was obtained from the filamentous green alga Spirogyra neglecta. The effects of initial concentration and contact time, pH, and temperature on the adsorption of lead(II) by the non-living algal biomass were studied. The equilibrium isotherms and kinetics were …
Antibactertial Property And Toxcity Study Of Medicinal Plant Tinospora Crispa L., Altammar Khadijah Ahmed Y.
Antibactertial Property And Toxcity Study Of Medicinal Plant Tinospora Crispa L., Altammar Khadijah Ahmed Y.
Student Works (2010-2019)
Tinospora crispa is a medically important herb used for centuries in traditional medicine for the treatment of various ailments. The aim of this study was to investigate the safety of the aqueous and alcoholic extract of Tinospora crispa by determining its toxicological effects after acute administration in rats, and to investigate the antibacterial activity of both extracts. Disc diffusion and broth dilution methods were carried out in determining the antibacterial effects of the plant extract on the pure cultures of clinical isolates of 8 MRSA and S. aureus ATCC strain. The disc-diffusion method of the ethanolic extracts showed inhibition zone …
A Study On Cell Suspension Cultures For Micropropagation And The Production Of Carpaine From Papaya (Carica Papaya L. Var. Eksotika)., Mohamad Fhaizal Mohamad Bukhori
A Study On Cell Suspension Cultures For Micropropagation And The Production Of Carpaine From Papaya (Carica Papaya L. Var. Eksotika)., Mohamad Fhaizal Mohamad Bukhori
Student Works (2010-2019)
Carica papaya L. is a member of Caricaceae family with four native genera. This fruit is economically important as in multi-purpose fruit produced for dessert and vegetable and is highly in demand for pharmaconomical trade particularly the plant compound as source of medicine. This species is a popular fruit crop in the tropical and sub-tropical regions of Malaysia, Thailand, Indonesia and the Philippines. It is also one of the most widely grown fruits in Malaysia and is mainly cultivated in Johor, Perak and Selangor. The Eksotika papaya variety was introduced to the farmers in the late eighties and this resulted …
Untreated And Enzyme-Modified Bovine Whey Products Reduce Association Of Salmonella Typhimurium, Escherichia Coli O157:H7 And Cronobacter Malonaticus (Formerly Enterobacter Sakazakii) To Caco-2 Cells, Rachel Halpin, D.B. Brady, E.D. O’Riordan, M. O’Sullivan
Untreated And Enzyme-Modified Bovine Whey Products Reduce Association Of Salmonella Typhimurium, Escherichia Coli O157:H7 And Cronobacter Malonaticus (Formerly Enterobacter Sakazakii) To Caco-2 Cells, Rachel Halpin, D.B. Brady, E.D. O’Riordan, M. O’Sullivan
Articles
Adhesion of a micro-organism to a cell surface is often considered to be the first step in pathogenesis. Inhibiting this process may have therapeutic effects in vivo. This study investigates the inhibitory effects of various bovine whey products on the association of Salm. Typhimurium, E. coli O157:H7 and C. malonaticus (formerly Enterobacter sakazakii) to the human CaCo-2 cell line. Invasion of CaCo-2 cells by Salm. Typhimurium and C. malonaticus was also examined.
Unstandard Standardization: The Case Of Biology, Arti K. Rai
Unstandard Standardization: The Case Of Biology, Arti K. Rai
Faculty Scholarship
How applicable are the approaches adopted by information and communication technology standards-setting organizations to biological standards? Most engineering-based industries construct products from standard, well understood components. By contrast, despite the early attachment of the moniker “genetic engineering” to biotechnology, standardization in the biological sciences has been relatively rare.