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Biochemistry, Biophysics, and Structural Biology Commons™

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

Molecular Biology

University of Wisconsin Milwaukee

2019

Articles 1 - 6 of 6

Full-Text Articles in Biochemistry, Biophysics, and Structural Biology

A Seascape Genetics Approach To Studying Genetic Differentiation In The Bull Kelp Nereocystis Luetkeana, Lily G. Gierke Dec 2019

A Seascape Genetics Approach To Studying Genetic Differentiation In The Bull Kelp Nereocystis Luetkeana, Lily G. Gierke

Theses and Dissertations

The brown alga Nereocystis luetkeana is a foundation species found from Alaska to California. In the Salish Sea, N. luetkeana is declining, but little is known about its population structure. We explored N. luetkeana 1) allelic dissimilarity and richness using seven microsatellite markers, and 2) tested models of gene flow in the Salish Sea using a hydrodynamic transport model. Our results suggest that the N. luetkeana distribution is comprised of four genetic co-ancestry groups that are geographically coherent, apart from the separation of the Strait of Georgia/Puget Sound by the Strait of Juan de Fuca. Our model supported that environmental …

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Development Of Indicators For Human Fecal Pollution Using Deep-Sequencing Of Microbial Communities, Shuchen Feng Aug 2019

Development Of Indicators For Human Fecal Pollution Using Deep-Sequencing Of Microbial Communities, Shuchen Feng

Theses and Dissertations

The gut microbiome is shaped by both host physiology and environmental factors, which results in unique communities that contain certain members specific to a host. Microbial source tracking (MST) methods that rely on host-specific fecal microorganisms have been applied to detect human fecal pollution over the past two decades. The most common approach uses quantitative polymerase chain reaction (qPCR) to amplify certain sequences of these microorganisms, or human fecal markers. To date, most bacterial human fecal markers have focused on the HF183 cluster within the genus Bacteroides. However, cross-reactions with animals or variable Bacteroides abundance in humans have been found. …

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Flavobacterium Gliding Motility: From Protein Secretion To Cell Surface Adhesin Movements, Joseph Johnston Aug 2019

Flavobacterium Gliding Motility: From Protein Secretion To Cell Surface Adhesin Movements, Joseph Johnston

Theses and Dissertations

Flavobacterium johnsoniae exhibits rapid gliding motility over surfaces. At least twenty genes are involved in this process. Seven of these, gldK, gldL, gldM, gldN, sprA, sprE, and sprT encode proteins of the type IX protein secretion system (T9SS). The T9SS is required for surface localization of the motility adhesins SprB and RemA, and for secretion of the soluble chitinase ChiA. This thesis demonstrates that the gliding motility proteins GldA, GldB, GldD, GldF, GldH, GldI and GldJ are also essential for secretion. Cells with mutations in the genes encoding any of these seven proteins had normal levels of gldK mRNA but …

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Mechanistic Insights Into Translational Silencing Of Hacl Mrna In Yeast S. Cerevisiae, Leena Sathe Aug 2019

Mechanistic Insights Into Translational Silencing Of Hacl Mrna In Yeast S. Cerevisiae, Leena Sathe

Theses and Dissertations

Protein synthesis is a fundamental life process. Protein synthesis regulates cellular metabolism, cellular growth, the cell cycle, and cell morphogenesis. Technical advances in molecular biology, advanced high-throughput sequencing technologies and recent developments in crystallographic methodologies have aided in better understanding of the process of protein synthesis. Current knowledge of protein synthesis provides us with an overview of the initiation, elongation, and termination steps, general regulatory mechanisms, and molecular functions of the ribosomal rRNA and proteins. However, even with all this information we are far from understanding the detailed sequence of molecular interactions involved in the process of protein synthesis. We …

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Dissection Of Floral Organ Development And Sterility In Sorghum Bicolor, Ashley R. Smith Aug 2019

Dissection Of Floral Organ Development And Sterility In Sorghum Bicolor, Ashley R. Smith

Theses and Dissertations

Sorghum bicolor is a drought resistant cereal grain commonly grown for use in food, feed, fiber, and fuel production. Due to its versatility and modest sized genome it is poised to become an increasingly important research organism within the C4 plants. Sorghum produces spikelet pairs with one fertile sessile spikelet and one to two sterile pedicellate spikelets. One major area of interest in sorghum production is maximizing seed yield. While the importance of the grain is obvious there are several large gaps in the study of sorghum that prevent researchers and growers from maximum productivity. The first gap is that …

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Lorelei Localization And Ovule Ultrastructure In Arabidopsis Thaliana, Juleen May Dickson Aug 2019

Lorelei Localization And Ovule Ultrastructure In Arabidopsis Thaliana, Juleen May Dickson

Theses and Dissertations

Communication between the male and female gametophyte is vital to successful fertilization during sexual reproduction in plants. One of the proteins known to be important for communication between the male and female gametophyte is LORELEI (LRE). Several studies have shown that there are defects in pollen tube guidance and synergid degeneration, however this is the first study that shows that cell wall thickness in the female gametophyte may also be affected. Previous confocal studies have documented that LRE is present both in the filiform apparatus and found in puncta throughout the cytoplasm. This study confirmed this, but our studies suggest …

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