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A Dual-metal-catalyzed Sequential Cascade Reaction in an Engineered Protein Cage**
Abstract: Herein, we describe the creation of an artificial protein cage housing a dual-metal-tagged guest protein that catalyzes a linear, two-step sequential cascade reaction. The guest protein consists of a fusion protein of HaloTag and monomeric rhizavidin. Inside the protein capsid, we established a ruthenium-catalyzed allylcarbamate deprotection reaction followed by a gold-catalyzed ring-closing hydroamination reaction that led to indoles and phenanthridines with an overall yield of up to 66 % in aqueous solutions. Furthermore, we show that the encapsulation stabilizes the metal catalysts against deactivation by air, proteins and cell lysate
The Two-component Locus MSMEG_0244/0246 Together with MSMEG_0243 Affects Biofilm Assembly in M. Smegmatis Correlating with Changes in Phosphatidylinositol Mannosides Acylation
Abstract: Ferric and ferrous iron is an essential transition metal for growth of many bacterial species including mycobacteria. The genomic region msmeg_0234 to msmeg_0252 from Mycobacterium smegmatis is putatively involved in iron/heme metabolism. We investigate the genes encoding the presumed two component system MSMEG_0244/MSMEG_0246, the neighboring gene msmeg_0243 and their involvement in this process. We show that purified MSMEG_0243 indeed is a heme binding protein. Deletion of msmeg_0243/msmeg_0244/msmeg_0246 in Mycobacterium smegmatis leads to a defect in biofilm formation and colony growth on solid agar, however, this phenotype is independent of the supplied iron source. Further, analysis of the corresponding mutant and its lipids reveals that changes in morphology and biofilm formation correlate with altered acylation patterns of phosphatidylinositol mannosides (PIMs). We provide the first evidence that msmeg_0244/msmeg_0246 work in concert in cellular lipid homeostasis, especially in the maintenance of PIMs, with the heme-binding protein MSMEG_0243 as potential partner
Increasing the Selectivity of Light Active Anti-microbial Agents - Or how to Get a Photosensitizer to the Desired Target?
Abstract: Photosensitizers combine the inherent reactivity of reactive oxygen species with the sophisticated reaction control of light. Through selective targeting, these light-active molecules have the potential to overcome certain limitations in drug discovery. Ongoing advances in the synthesis and evaluation of photosensitizer conjugates with biomolecules such as antibodies, peptides, or small-molecule drugs are leading to increasingly powerful agents for the eradication of a growing number of microbial species. This review article, therefore, summarizes challenges and opportunities in the development of selective photosensitizers and their conjugates described in recent literature. This provides adequate insight for newcomers and those interested in this field
Advances in Chemical Biology – An Approach In Future Perspectives Volume – 3
Advances in Chemical Biology – Volume 3 The current book summary envisages the basic aspects of chemistry and biology thoughts, with the allied area of multidiscipline which comprises applications of chemical and biological disciplines and these are significant literatureto innovative minds to enrich their knowledge by research topics as anilluminative element to focus it in their research studies in the field of sciences. The book highlights research objectives on synthetic chemistry, newer approach of synthesis process and their various applications in in vitro and in vivo level as per the pharmaceutical industry requirements for commercialize the product to cure the various diseases and...
Liposomes: A Practical Approach
This book is an up-to-date and unique collection of experimental protocols from an area of pharmaceutical research that is essential for the development of new, highly specific drugs as well as for the exploration of completely new therapeutic approaches to disease treatments.
The Organic Chemistry of Biological Pathways
Intended for advanced undergraduates and graduate students in all areas of biochemistry, The Organic Chemistry of Biological Pathways provides an accurate treatment of the major biochemical pathways from the perspective of mechanistic organic chemistry.
Synthetic Biology
A review of the interdisciplinary field of synthetic biology, from genome design to spatial engineering. Written by an international panel of experts, Synthetic Biology draws from various areas of research in biology and engineering and explores the current applications to provide an authoritative overview of this burgeoning field. The text reviews the synthesis of DNA and genome engineering and offers a discussion of the parts and devices that control protein expression and activity. The authors include information on the devices that support spatial engineering, RNA switches and explore the early applications of synthetic biology in protein synthesis, generation of pathway libraries, and immunotherapy. Filled with the most recent research, compelling discussions, and unique perspectives, Synthetic Biology offers an important resource for understanding how this new branch of science can improve on applications for industry or biological research.
