53 research outputs found
Cyclic TPR/TPO experiments for studying Cu/ZnO/Al<sub>2</sub>O<sub>3</sub> catalysts using in situ XRD and XAS
Pennsylvania Folklife Vol. 33, No. 4
⢠I Remember Well: Thirty-Five Years of the Kutztown Folk Festival ⢠Furniture Graining ⢠Old Fashioned Clear Toy Candy ⢠Metal Etching ⢠Stenciling ⢠Baskets and Basket Weavers ⢠Apple Butter: Then and Now ⢠Festival Focus ⢠Festival Programs ⢠20th Annual Quilting Contest ⢠Quilts and Quilt Marking ⢠The Art of the Pennsylvania Dutch ⢠Music on the Main Stage ⢠Scratchboard ⢠Pennsylvania Dutch Folk Art in Wood ⢠The Windsor Chair ⢠Hex Signshttps://digitalcommons.ursinus.edu/pafolklifemag/1104/thumbnail.jp
Archaic chaos: intrinsically disordered proteins in Archaea
Background: Many proteins or their regions known as intrinsically disordered proteins (IDPs) and intrinsically disordered regions (IDRs) lack unique 3D structure in their native states under physiological conditions yet fulfill key biological functions. Earlier bioinformatics studies showed that IDPs and IDRs are highly abundant in different proteomes and carry out mostly regulatory functions related to molecular recognition and signal transduction. Archaea belong to an intriguing domain of life whose members, being microbes, are characterized by a unique mosaic-like combination of bacterial and eukaryotic properties and include inhabitants of some of the most extreme environments on the planet. With the expansion of the archaea genome data (more than fifty archaea species from five different phyla are known now), and with recent improvements in the accuracy of intrinsic disorder prediction, it is time to re-examine the abundance of IDPs and IDRs in the archaea domain.Results: The abundance of IDPs and IDRs in 53 archaea species is analyzed. The amino acid composition profiles of these species are generally quite different from each other. The disordered content is highly species-dependent. Thermoproteales proteomes have 14% of disordered residues, while in Halobacteria, this value increases to 34%. In proteomes of these two phyla, proteins containing long disordered regions account for 12% and 46%, whereas 4% and 26% their proteins are wholly disordered. These three measures of disorder content are linearly correlated with each other at the genome level. There is a weak correlation between the environmental factors (such as salinity, pH and temperature of the habitats) and the abundance of intrinsic disorder in Archaea, with various environmental factors possessing different disorder-promoting strengths. Harsh environmental conditions, especially those combining several hostile factors, clearly favor increased disorder content. Intrinsic disorder is highly abundant in functional Pfam domains of the archaea origin. The analysis based on the disordered content and phylogenetic tree indicated diverse evolution of intrinsic disorder among various classes and species of Archaea.Conclusions: Archaea proteins are rich in intrinsic disorder. Some of these IDPs and IDRs likely evolve to help archaea to accommodate to their hostile habitats. Other archaean IDPs and IDRs possess crucial biological functions similar to those of the bacterial and eukaryotic IDPs/IDRs
Time-since-invasion increases native mesoherbivore feeding rates on the invasive alga, <em>Sargassum muticum</em> (Yendo) Fensholt
The chemical defences of the invasive alga <em>Sargassum </em><em>muticum </em>(Yendo) Fensholt correlate to mesoherbivore diversity, but not to time-since-invasion
Sex-specific reproductive trade-offs in the gregarious fucoid macroalga <em>Ascophyllum nodosum</em>
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Assessment of the Relationship Between Freshwater Inflow and Biological Indicators in Lavaca Bay
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