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Articles 481 - 510 of 13923
Full-Text Articles in Biochemistry, Biophysics, and Structural Biology
Role Of Cdx4 And Sp5l In Zebrafish Development, Wesley Tsai
Role Of Cdx4 And Sp5l In Zebrafish Development, Wesley Tsai
Honors Theses
The Caudal Type Homeobox transcription factors cdx are a family of genes found in vertebrates that regulates body regionalization and anterior-posterior patterning. They are also responsible for regulating axial elongation, but the mechanisms behind this behavior are not known. Previous studies in mouse embryonic stem cells have shown that the cdx genes are necessary for upregulating the gene sp5 which may be linked to axial elongation. Sp5 is a zinc-finger transcription factor belonging to the specificity protein (sp) family. Our group has used in-situ hybridization experiments on zebrafish embryos to show that sp5-like (sp5l) is transcribed within tailbud tissues that …
Bryophytes Of Goochland County, Virginia, Mikayla Quinn
Bryophytes Of Goochland County, Virginia, Mikayla Quinn
Honors Theses
Bryophytes are non-vascular land plants that include mosses, liverworts, and hornworts. Although easier to overlook because of their smaller size, bryophytes are a fundamental part of the ecosystem. As such, maintaining record of their biodiversity is important. Yet, records of bryophyte species in Goochland County, VA were low compared to more thoroughly documented counties such as Prince Edward County. This study expands the documentation of bryophyte flora and presents a checklist of bryophyte species found Virginia’s Goochland County from 2020-2023. Fieldwork conducted at public and privately-owned properties throughout the county between January 2020 and March 2023 yielded 702 specimens that …
The Role Of Sars-Cov-2 Orf8 Protein Arks Motif On Novobiocin Binding, Si Chun Chiu, My T. Nguyen
The Role Of Sars-Cov-2 Orf8 Protein Arks Motif On Novobiocin Binding, Si Chun Chiu, My T. Nguyen
Celebrating Scholarship and Creativity Day (2018-)
The discovery of the SARS-CoV-2 virus during the COVID-19 pandemic required scientists to develop medical solutions to reduce infectivity, severity of symptoms, and death. Although vaccines and drugs provided urgent assistance, the need to continue developing better drugs is necessary long term, and understanding the structure of the virus and finding potential inhibitors would prove vital to discovering solutions to this worldwide health problem. This experimental project focuses on targeting the unique accessory protein, Open Reading Frame 8 (ORF8) in SARS-CoV-2 through studying its interactions with a repurposable drug, novobiocin. Importantly, ORF8 specializes in helping evade immune system checks by …
Investigating The Helicase Activity Of Methylated Vs Unmethylated Ded1, Hannah Lukow
Investigating The Helicase Activity Of Methylated Vs Unmethylated Ded1, Hannah Lukow
Honors Theses
Ded1 is an RNA helicase protein of the DEAD-box subfamily in eukaryotic organisms (Sharma & Jankowsky, 2014) which can act as an activator or initiation factor, during translation (Hilliker et al., 2011). Ded1 has several functions in yeast including assembly of translational initiation factors, scanning the mRNA for the start codon, and unwinding any double stranded segments of mRNA with its helicase ability. Ded1 was discovered to be methylated at four arginine sites in vivo (Low et al., 2013), with a fifth methylation site being discovered recently (Low et al., 2020), however the purpose of such post-translational modifications is still …
Testing Of Indazole Inhibitors Of Kasa, A Vital Enzyme Of M. Tuberculosis, Karissa Highlander
Testing Of Indazole Inhibitors Of Kasa, A Vital Enzyme Of M. Tuberculosis, Karissa Highlander
Student Research Submissions
Tuberculosis is a disease that affects the lungs caused by Mycobacterium tuberculosis (M. tuberculosis). Although drug treatment options exist, increased rates of antibiotic resistant strains have become more prevalent in recent years, driving a need for new treatment approaches. KasA, a β-ketoacyl synthase, has been found to synthesize parts of the cell wall and been identified as an attractive drug target. Previous medicinal chemistry research has been completed to synthesize six effective competitive inhibitors of KasA that would potentially block the enzyme from binding the substrate, preventing elongation of the backbone and creation of the mycolic fatty acids that …
The Role Of Cerium(Iii) In Bacterial Growth And The Microbial Transformation Of Aromatic Hydrocarbons, Shruti Sathish
The Role Of Cerium(Iii) In Bacterial Growth And The Microbial Transformation Of Aromatic Hydrocarbons, Shruti Sathish
Honors Theses
Biofilms are communities of surface-attached bacterial cells encased in an exopolymeric matrix. In this state, they are more resistant to antimicrobial treatment and can have adverse effects in medical, agricultural, and industrial settings. Whereas, as biocatalysts, biofilms from nonpathogenic bacteria enhance their performance and stability in catalysis. Unfortunately, there are several challenges when using bacteria in organic transformations due to their complex cellular chemistry. Trivalent lanthanide metals were discovered to serve regulatory roles in some bacterial catalytic processes, including those of Pseudomonas putida KT2440 (P. putida), a non-infectious Gram-negative bacterium. The main goal of our research is to use cerium(III) …
Genome Announcement For E Cluster Phage Tarkin, Katherine Cleary
Genome Announcement For E Cluster Phage Tarkin, Katherine Cleary
Chemistry & Biochemistry Student Scholarship
Katherine Cleary ’23
Major: Biochemistry
Faculty Mentor: Dr. Kathleen Cornely, Chemistry and Biochemistry
Toward The Design, Synthesis, And Characterization Of Abiotic Coiled-Coil Peptides Via Solid-Phase Copper-Catalyzed Azide-Alkyne Cycloaddition (Sp-Cuaac) Click Reaction For The Preparation Of Controlled Self-Assembly Molecular Building Block, Liaquat Ali
Chemistry Theses
The production of cutting-edge materials, the development of novel medications, drug delivery systems, technological advancements, and biosynthesizing all depend on molecular building blocks. Proteins are required for the creation of intricate, well-organized structures, and coiled-coil protein domains are vital subunits for the oligomerization of protein complexes, gene expression, and the structural components of biological materials. The numerous interactions between a wide variety of amino acids make it difficult to assemble protein complexes with a particular shape. In the current study, we successfully designed and synthesized four different 32-residue peptides, each of which had two modified amino azide residues. These peptides …
Apoptosis Induction In Jurkat T-Lymphocytes By Proton Pump Inhibitors (Ppis), Shreya Murali, Randall Reif
Apoptosis Induction In Jurkat T-Lymphocytes By Proton Pump Inhibitors (Ppis), Shreya Murali, Randall Reif
Student Research Submissions
Apoptosis, commonly known as programmed cell death, constantly occurs in humans. As a cancer cell increases in acidity, apoptosis is induced. In healthy cells, proton pump proteins allow for H+ ions to permeate cellular membranes, regulating pH. However, proton pump inhibitors (PPIs), such as omeprazole, prevent proton movement. In previous studies, omeprazole induced cell death in Jurkat T lymphocytes; however, there was no confirmation of whether the cells died through apoptosis, or through necrosis, where the cell bursts. By using Annexin-V staining, the effects of omeprazole, dexlansoprazole, and esomeprazole on apoptosis induction can be measured. Cell death was observed …
From Deep Mutational Mapping Of Allosteric Protein Landscapes To Deep Learning Of Allostery And Hidden Allosteric Sites: Zooming In On “Allosteric Intersection” Of Biochemical And Big Data Approaches, Gennady M. Verkhivker, Mohammed Alshahrani, Grace Gupta, Sian Xiao, Peng Tao
From Deep Mutational Mapping Of Allosteric Protein Landscapes To Deep Learning Of Allostery And Hidden Allosteric Sites: Zooming In On “Allosteric Intersection” Of Biochemical And Big Data Approaches, Gennady M. Verkhivker, Mohammed Alshahrani, Grace Gupta, Sian Xiao, Peng Tao
Mathematics, Physics, and Computer Science Faculty Articles and Research
The recent advances in artificial intelligence (AI) and machine learning have driven the design of new expert systems and automated workflows that are able to model complex chemical and biological phenomena. In recent years, machine learning approaches have been developed and actively deployed to facilitate computational and experimental studies of protein dynamics and allosteric mechanisms. In this review, we discuss in detail new developments along two major directions of allosteric research through the lens of data-intensive biochemical approaches and AI-based computational methods. Despite considerable progress in applications of AI methods for protein structure and dynamics studies, the intersection between allosteric …
A Highly Charged Topic: Intrinsically Disordered Proteins And Protein Pka Values, Carter J. Wilson
A Highly Charged Topic: Intrinsically Disordered Proteins And Protein Pka Values, Carter J. Wilson
Electronic Thesis and Dissertation Repository
Intrinsically disordered proteins (IDPs) are known not only for their roles in disease but also for their conformational flexibility, which makes them elusive for experimentation. We consider the role played by theory and simulation in resolving important questions pertaining to IDP structure and dynamics, as well as the nature of the charged residues (e.g., glutamate, lysine, etc.) that enrich them. Specifically, we investigated how the deep learning trained AlphaFold2 (AF2) predictor estimates disorder content, revealing both strong performance in relation to conventional approaches and an important relationship between the AF2 confidence metric and IDP dynamics. We also assessed how modern …
A Potential Role Of Gsk-3beta In The Development Of Pain Post-Spinal Cord Injury, Emily Ernst
A Potential Role Of Gsk-3beta In The Development Of Pain Post-Spinal Cord Injury, Emily Ernst
Undergraduate Theses
Chronic neuropathic pain is a very common consequence following spinal cord injury (SCI) and poses significant clinical challenge. Current treatments are largely ineffective and as a result, patients are often left with debilitating pain at and below the level of the spinal cord injury. After spinal injury, a cascade of events occurs within the nervous system. One important aspect of this cascade for investigation is the anatomical changes that occur post-SCI. There is evidence of maladaptive sprouting/growth in sensory nerve fibers that is thought to play a role in the development and amplification of pain signals. Sprouting of primary afferents …
Assessment Of Histone Acetyltransferase Homologs In Cryptococcus Neoformans, Phoebe Bridy, Felice Kho, Yuqi Wang
Assessment Of Histone Acetyltransferase Homologs In Cryptococcus Neoformans, Phoebe Bridy, Felice Kho, Yuqi Wang
Liberty University Research Week
Undergraduate
Basic
Study Of Protein Extraction Techniques For M. Foliorum Phages, Lola Sibaud, Anna Elgersma
Study Of Protein Extraction Techniques For M. Foliorum Phages, Lola Sibaud, Anna Elgersma
Student Academic Conference
Characterizing phages is becoming increasingly important in biochemistry and biotechnology due to their potential to treat bacterial infections without need for antibiotics. Last year, students attempted to isolate proteins from Microbacterium foliorum infecting phages Babydotz and Rosadiaz. Proteins were successfully extracted; however, after further analysis it was shown that the obtained proteins belonged to the host bacteria and not the phages. The purpose of this study was to find a method to separate phage from host bacterial debris to successfully isolate phage proteins and analyze them later. Isolating phage proteins could help us characterize more phages and know more about …
Activation Of Nrf2 Pathway By Natural Products, Genesis Schat, Madelyn Sedlachek
Activation Of Nrf2 Pathway By Natural Products, Genesis Schat, Madelyn Sedlachek
Liberty University Research Week
Undergraduate
Basic
Characterization Of A Sas3 Homolog In The Human Pathogenic Yeast Cryptococcus Neoformans, Lillianne Bartone
Characterization Of A Sas3 Homolog In The Human Pathogenic Yeast Cryptococcus Neoformans, Lillianne Bartone
Liberty University Research Week
Undergraduate
Basic
Novel Plant Peroxidase Investigation For Use In Various Biochemical And Practical Applications, Sally Hess
Novel Plant Peroxidase Investigation For Use In Various Biochemical And Practical Applications, Sally Hess
Liberty University Research Week
Undergraduate
Basic
Investigating The Effect Of Medium Chain Triglycerides On The Elasticity Of Pulmonary Surfactant, Maksymilian Dziura, Stuart R. Castillo, Mitchell Dipasquale, Omotayo Gbadamosi, Piotr Zolnierczuk, Michihiro Nagao, Elizabeth G. Kelley, Drew Marquardt
Investigating The Effect Of Medium Chain Triglycerides On The Elasticity Of Pulmonary Surfactant, Maksymilian Dziura, Stuart R. Castillo, Mitchell Dipasquale, Omotayo Gbadamosi, Piotr Zolnierczuk, Michihiro Nagao, Elizabeth G. Kelley, Drew Marquardt
Chemistry and Biochemistry Publications
In recent years, vaping has increased in both popularity and ease of access. This has led to an outbreak of a relatively new condition known as e-cigarette/vaping-associated lung injury (EVALI). This injury can be caused by physical interactions between the pulmonary surfactant (PS) in the lungs and toxins typically found in vaping solutions, such as medium chain triglycerides (MCT). MCT has been largely used as a carrier agent within many cannabis products commercially available on the market. Pulmonary surfactant ensures proper respiration by maintaining low surface tensions and interface stability throughout each respiratory cycle. Therefore, any impediments to this system …
Characterization Of Select Lysine Mutations Of The Cystine/Glutamate Transporter, System XC-, Anna Koppin, Claire Buck, Amanda Gibson
Characterization Of Select Lysine Mutations Of The Cystine/Glutamate Transporter, System XC-, Anna Koppin, Claire Buck, Amanda Gibson
22nd Annual Celebration of Undergraduate Research and Creative Activity (2023)
System xc- is a membrane transport system that plays a critical role in mitigating oxidative stress. As such, its regulation is critical for proper brain functioning. Recent work in our lab has shown that System xc- activity increases immediately during an oxidative insult by undergoing a change in localization to the plasma membrane, but we have yet to identify the specific mechanism for the redistribution of the transporter. Previous studies have demonstrated that post-translational modifications of proteins can lead to differential protein distribution within cells. Therefore, in this study, we sought to determine if post-translational modification (PTM) of the transporter …
Does Phosphorylation On Serine 26 Of System Xc- Lead To Changes In Cell Surface Expression?, Katherine Lane
Does Phosphorylation On Serine 26 Of System Xc- Lead To Changes In Cell Surface Expression?, Katherine Lane
22nd Annual Celebration of Undergraduate Research and Creative Activity (2023)
System xc- is involved in transporting cystine into cells and glutamate out of cells, and ultimately in production of the antioxidant glutathione. Antioxidants are important in protecting cells from oxidative stress which can occur when waste products like H2O2 build up in the cell. Previous studies have shown that a critical regulator mTORC regulates system xc- by phosphorylating serine 26 (S26) on the N-terminus of the cystine/glutamate antiporter xCT, leading to a reduction in transport activity. The specific objective of this study is to determine the mechanism by which phosphorylation of S26 affects activity. To …
Creation Of An N-Terminal Xct Mutant Lacking Lysines For Use In Protein Turnover Studies, Alexandria Switzer
Creation Of An N-Terminal Xct Mutant Lacking Lysines For Use In Protein Turnover Studies, Alexandria Switzer
22nd Annual Celebration of Undergraduate Research and Creative Activity (2023)
xCT plays a role in protecting cells from oxidative stress as well as intracellular glutathione synthesis. If this process is impeded, reactive oxygen species accumulate in the cell, leading to cellular damage, and if left unchecked, it can lead to neuronal loss. Ubiquitin is a small protein that some evidence suggests can negatively affect the stress response pathway modulated by xCT, as well as induce cell death. It is hypothesized that ubiquitin binds to xCT on the N-terminal lysine residues, and there are six conserved lysines in the N-terminal domain at positions K4R, K12R, K30R, K37R, K41R, and K43R. Previous …
Early Life Δ9-Tetrahydrocannabinol Exposure Of F0 Zebrafish Causes Hyperactivity In F1 Offspring, Jenna Cripe
Early Life Δ9-Tetrahydrocannabinol Exposure Of F0 Zebrafish Causes Hyperactivity In F1 Offspring, Jenna Cripe
Honors Theses
As cannabis increases in its accessibility, potency, and acceptance across the United States, investigation into the multigenerational effects of Δ9-tetrahydrocannabinol (THC) exposure during key stages of development is critical. The aim of this study was to evaluate whether there would be behavioral impacts in the F1 offspring following a dose-response of THC exposure (0.08, 0.4, or 1 µM) during development in the F0 generation. Zebrafish (Danio rerio) were utilized in this study. Behaviors (locomotive activity and anxiety-like behavior) in the F1 generation were evaluated at 120 hours post-fertilization (hpf) with the larval photometer response (LPR) assay, and at 3, 11, …
A Fisher Indole Synthesis Approach To Phidianidine Analogues, Anna Tingler, Trinity Ghering, Samuel Ross
A Fisher Indole Synthesis Approach To Phidianidine Analogues, Anna Tingler, Trinity Ghering, Samuel Ross
Undergraduate Research Competition
Naturally occurring products are molecules that are found in the natural world without the aid of humans. Aspirin and opium are famous examples of this classification of molecule. Another example of natural products that are less known are the phidianidines. Phidianidines A & B were isolated from a shell-less mollusk, Phidiana militaris. These molecules are comprised of a 1,2,4-oxadiazole ring, an indole and an aminoalkylguanadio group. These compounds have exhibited striking pharmacological behavior such as that of neutralizing reactive oxygen species and acting as an agonist for the μ-opioid receptor. In recent years, the synthesis of phidianidine analogues has replaced …
A New Approach To The Core Of Flinderole C, Ana Pettijohn, Claire Romain
A New Approach To The Core Of Flinderole C, Ana Pettijohn, Claire Romain
Undergraduate Research Competition
The flinderoles A-C are a class of anti-malaria bisindole alkaloids from plants of the Flindersia genus. Flinderole C was specifically from the Papua New Guinean plant called F. amboinensis and is the most potent antimalarial of the group. Malaria is a parasitic infectious disease usually found in the hot, tropic regions of the world, such as parts of Africa. It is estimated that nearly half the world's population lives in an area where it is endemic. Furthermore, malaria was estimated to have caused over 600,000 deaths in 2020. While measures to limit the spread of the disease lessen its impact, …
Environmental Bacteriophage Presence In The Drainage Ponds At Coastal Carolina University, Alexei Chesnutwood
Environmental Bacteriophage Presence In The Drainage Ponds At Coastal Carolina University, Alexei Chesnutwood
Undergraduate Research Competition
The purpose of this research is to detect naturally occurring, lytic bacteriophages and identify the environmental factors that influence their presence on Coastal Carolina University’s campus. Bacteriophages are non-living viruses that only infect bacteria, and these viruses are found in abundance in every environment. Likewise, coliphages are viruses that exclusively infect coliform bacteria. Eleven treated and untreated freshwater sample sites were chosen for weekly sampling on CCU’s campus. During water sample collection, ambient environmental conditions were measured. In addition, precipitation was tracked over the collection period as runoff relates to the proliferation of bacteriophages. If plaque assays indicated the presence …
Developing A Safe And Effective Papillomavirus Screen To Be Used On College Students, Nicole Frantz
Developing A Safe And Effective Papillomavirus Screen To Be Used On College Students, Nicole Frantz
Undergraduate Research Competition
Human papillomavirus (HPV) is the most common sexually transmitted infection that accounts for approximately 5% of all cancers worldwide and affects more than 80 million people in the US alone, according to the CDC and National Cancer Institute. Human papillomaviruses are small, nonenveloped, icosahedral DNA viruses that infect squamous epithelial cells. The viral particles consist of a single double stranded DNA molecule bound to histones and contained within a protein capsid composed of structural proteins late (L)1 and L2. To date, over 100 different genotypes of HPV have been identified, and approximately 15 types are considered oncogenic in cervical, vulvar, …
A Ferritin Nanoparticle-Based Zika Virus Vaccine Candidate Induces Robust Humoral And Cellular Immune Responses And Protects Mice From Lethal Virus Challenge, Aryamav Pattnaik, Bikash R. Sahoo, Lucas R. Struble, Gloria E. O. Borgstahl, You Zhou, Rodrigo Franco, Raul G. Barletta, Fernando A. Osorio, Thomas M. Petro, Asit K. Pattnaik
A Ferritin Nanoparticle-Based Zika Virus Vaccine Candidate Induces Robust Humoral And Cellular Immune Responses And Protects Mice From Lethal Virus Challenge, Aryamav Pattnaik, Bikash R. Sahoo, Lucas R. Struble, Gloria E. O. Borgstahl, You Zhou, Rodrigo Franco, Raul G. Barletta, Fernando A. Osorio, Thomas M. Petro, Asit K. Pattnaik
School of Veterinary and Biomedical Sciences: Faculty Publications
The severe consequences of the Zika virus (ZIKV) infections resulting in congenital Zika syndrome in infants and the autoimmune Guillain–Barre syndrome in adults warrant the development of safe and efficacious vaccines and therapeutics. Currently, there are no approved treatment options for ZIKV infection. Herein, we describe the development of a bacterial ferritin-based nanoparticle vaccine candidate for ZIKV. The viral envelope (E) protein domain III (DIII) was fused in-frame at the amino-terminus of ferritin. The resulting nanoparticle displaying the DIII was examined for its ability to induce immune responses and protect vaccinated animals upon lethal virus challenge. Our results show that …
Moderate-Intensity Exercise Improves Mesenteric Arterial Function In Male Uc Davis Type-2 Diabetes Mellitus (Ucd-T2dm) Rats: A Shift In The Relative Importance Of Endothelium-Derived Relaxing Factors (Edrf), Md Rahatullah Razan, Said Amissi, Rifat Ara Islam, James L. Graham, Kimber L. Stanhope, Peter J. Havel, Roshanak Rahimian
Moderate-Intensity Exercise Improves Mesenteric Arterial Function In Male Uc Davis Type-2 Diabetes Mellitus (Ucd-T2dm) Rats: A Shift In The Relative Importance Of Endothelium-Derived Relaxing Factors (Edrf), Md Rahatullah Razan, Said Amissi, Rifat Ara Islam, James L. Graham, Kimber L. Stanhope, Peter J. Havel, Roshanak Rahimian
School of Pharmacy Faculty Articles
The beneficial cardiovascular effects of exercise are well documented, however the mechanisms by which exercise improves vascular function in diabetes are not fully understood. This study investigates whether there are (1) improvements in blood pressure and endothelium-dependent vasorelaxation (EDV) and (2) alterations in the relative contribution of endothelium-derived relaxing factors (EDRF) in modulating mesenteric arterial reactivity in male UC Davis type-2 diabetes mellitus (UCD-T2DM) rats, following an 8-week moderate-intensity exercise (MIE) intervention. EDV to acetylcholine (ACh) was measured before and after exposure to pharmacological inhibitors. Contractile responses to phenylephrine and myogenic tone were determined. The arterial expressions of endothelial nitric …
Locomotor Biomechanics In Stream Gobies, Rhinogobius Sp.: Functional Performance Of Waterfall-Climbing Behavior, Ernest W. Murphy
Locomotor Biomechanics In Stream Gobies, Rhinogobius Sp.: Functional Performance Of Waterfall-Climbing Behavior, Ernest W. Murphy
Student Scholar Showcase
Gobiidae is the taxonomic classification of a large fish family comprising over 2,000 species. A few goby species have the unique ability of scaling waterfalls using pelvic fins that are fused into a suction disc (pelvic sucker) located on the ventral side of the body, aiding them in upstream migration to freshwater feeding and reproduction locations. This study aimed to investigate the locomotor biomechanics of Rhinogobius goby fish due to the lack of literature in the area. In particular, climbing performance variables (pressure differential, force, endurance, and kinematics of attachment), pelvic sucker fatigability, and ontogenetic patterns of physical development and …
Analysis Of Attitudinal Student Learning Benefits From A Course-Based Undergraduate Research Experience (Cure) Adapted For Online Format, Ambika Kapil, Luis C. Gonzalez Isoba, Niraj Pathak, Arthur Sikora, Santanu De
Analysis Of Attitudinal Student Learning Benefits From A Course-Based Undergraduate Research Experience (Cure) Adapted For Online Format, Ambika Kapil, Luis C. Gonzalez Isoba, Niraj Pathak, Arthur Sikora, Santanu De
FDLA Journal
Course-based Undergraduate Research Experiences (CUREs) are an increasingly utilized model for exposing students to research. The lack of robust assessments is a major hurdle to wider adoption of CUREs. The Coronavirus Infectious Disease 2019 (COVID-19) pandemic necessitated a drastic shift of in-person courses to the online format. Using the Participant Perception Indicator (PPI) survey, we measured students’ self-reported changes in learning from such a biochemistry course at a large university in south Florida based on the Biochemistry Authentic Scientific Inquiry Lab (BASIL) model. By doing this, we were able to better understand the student-benefits of CUREs and how these benefits …