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Articles 1 - 6 of 6
Full-Text Articles in Molecular Biology
Specific Binding Affinity Of The Non-Catalytic Domain Of Eukaryotic Like Type Ib Topoisomerase Of Vaccinia Virus, Benjamin R. Reed
Specific Binding Affinity Of The Non-Catalytic Domain Of Eukaryotic Like Type Ib Topoisomerase Of Vaccinia Virus, Benjamin R. Reed
Dissertations, Theses, and Capstone Projects
Topoisomerases are ubiquitous proteins that alter supercoiling in double stranded DNA (dsDNA) during transcription and replication and. vaccinia and the closely related poxvirus variola virus, at 314 amino acids in length, encode the smallest of the type I topoisomerases(TopIB). TopIB is a two domain protein that recognizes the sequence 5’-T/CCCTT, cleaves at the 3’-end and relaxes supercoiling through rotation. The C-terminal domain (CTD) alone contains the catalytic activity and specificity. Deletion of the N-terminal domain results in a greatly reduced rate of relaxation and rapid dissociation. Biochemical data suggests that the N-terminal domain (NTD) is important for pre-cleavage binding and …
Molecular Analysis Of Ftsz-Ring Assembly In E. Coli Cytokinesis, Kuo-Hsiang Huang
Molecular Analysis Of Ftsz-Ring Assembly In E. Coli Cytokinesis, Kuo-Hsiang Huang
Dissertations, Theses, and Capstone Projects
An essential first step in bacterial division is the assembly of a cytokinetic ring (Z-ring) formed by the tubulin-like FtsZ at midcell. The highly conserved core domain of FtsZ has been reported to mediate assembly of FtsZ polymers in vivo and in vitro. Species-specific differences in the FtsZ C-terminal domain such as the FtsZ CTV region and interactions with several modulatory proteins such as ZapC and ZapD, restricted to certain bacterial classes, also serve as key determinants of FtsZ protofilament bundling. Here, we characterize (i) the roles of the FtsZ CTV region in mediating both longitudinal and lateral interactions …
Tuning Into Toxins And Channels: The Characterizations Of Tv1 And A Human Cardiac Sodium Channel Voltage-Sensor Domain, Mohammed H. Bhuiyan
Tuning Into Toxins And Channels: The Characterizations Of Tv1 And A Human Cardiac Sodium Channel Voltage-Sensor Domain, Mohammed H. Bhuiyan
Dissertations, Theses, and Capstone Projects
In nature, peptide toxins are an abundant resource, produced both by marine and terrestrial organisms. A major target of these peptide toxins is the group of the highly important voltage-gated ion channels. Due to their high specificity and affinity, peptide toxins have been used for over a decade in discovery and characterization of voltage-gated ion channels. Although peptide toxins have been extensively characterized structurally, the structural characterization of eukaryotic voltage-gated sodium channels has seen much less progress, due to their large size and high hydrophobicity. Voltage-gated sodium channels play crucial roles in many physiological processes, and when these processes are …
Circular Oligodeoxynucleotides (Coligos) As Chemically Synthesized, Promoter-Independent Small Rna Expression Vectors, Lodoe Lama
Dissertations, Theses, and Capstone Projects
Small RNAs (sRNA) such as microRNA (miRNA), small interfering RNA (siRNA), and other types of RNA have been found to play many important biological roles in regulation of different cellular process leading to their possible use as therapeutics. However, one of the biggest hurdles in exploiting these sRNAs in therapeutics has been the difficulty in delivering them safely and stably into human tissues. Many delivery approaches have been undertaken to deliver these sRNA, albeit with many shortcomings in terms of cost, stability, and side effects, necessitating the need for alternative approaches. We are exploring an entirely different approach for conveying …
The Interaction Between Eukaryotic Translation Initiation Factor Eif4g And 3’ Cap Independent Translation Element Of Barley Yellow Dwarf Virus Is Affected By Multiple Initiation Factors, Pei Zhao
Dissertations, Theses, and Capstone Projects
Barley Yellow Dwarf Virus (BYDV) lacks a 5’ (7-methyl guanosine) cap as well as a 3’poly A tail. Like many plant viruses, BYDV contains a cap independent translation element (CITE) in the 3’ untranslated region of the viral mRNA. BTE (Barley Yellow Dwarf Virus like cap-independent translation element) is one of the well characterized CITEs. BTE mediated translation primarily depends on eukaryotic initiation factor eIF4G. BTE binds to eIF4G; however, the details of BTE initiated translation are still unclear. Three eIF4G deletion mutants with different domain organization were used to investigate BTE interaction with eIF4G: eIF4G601-1196 is the eIF4G fragment …
Messenger Rna Transport And Translation Regulated By The 3' Utrs Of Dendritic Mrnas And Abnormal Alternative Splicing Of Neuroligin1 In The Fmr1 Ko Mouse Hippocampus, Tianhui Zhu
Dissertations, Theses, and Capstone Projects
Fragile X Syndrome (FXS) is one of the most commonly inherited mental retardations. It is caused by the loss of functional fragile X mental retardation protein (FMRP). Loss of functional FMRP is the most widespread single-gene cause of autism. The most prominent phenotype of FXS patients is an IQ ranging from 20 to 70. FMRP is an RNA binding protein, widely expressed in almost all tissues and highly expressed in brain. As a RNA binding protein, 85-90 % of FMRP in the brain is associated with polyribosomes. Approximately 4 % of total mRNA is associated with FMRP, which functions in …