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Generating Transposon Insertion Libraries in Gram-Negative Bacteria for High-Throughput Sequencing
Published on: July 7, 2020
How to Enter a Bacterium: Bacterial Porins and the Permeation of Antibiotics
Jigneshkumar Dahyabhai Prajapati1, Ulrich Kleinekathöfer1, Mathias Winterhalter2
1Department of Physics and Earth Sciences, Jacobs University, Bremen 28759, Germany.
Abstract:
Despite tremendous successes in the field of antibiotic discovery seen in the previous century, infectious diseases have remained a leading cause of death. More specifically, pathogenic Gram-negative bacteria have become a global threat due to their extraordinary ability to acquire resistance against any clinically available antibiotic, thus urging for the discovery of novel antibacterial agents. One major challenge is to design new antibiotics molecules able to rapidly penetrate Gram-negative bacteria in order to achieve a lethal intracellular drug accumulation. Protein channels in the outer membrane are known to form an entry route for many antibiotics into bacterial cells. Up until today, there has been a lack of simple experimental techniques to measure the antibiotic uptake and the local concentration in subcellular compartments. Hence, rules for translocation directly into the various Gram-negative bacteria via the outer membrane or via channels have remained elusive, hindering the design of new or the improvement of existing antibiotics. In this review, we will discuss the recent progress, both experimentally as well as computationally, in understanding the structure-function relationship of outer-membrane channels of Gram-negative pathogens, mainly focusing on the transport of antibiotics.
Insights
New methods are needed to understand how antibiotics enter Gram-negative bacteria. This research reviews progress in studying outer-membrane channels for better antibiotic design against resistant infections.
Area of Science:
- Microbiology
- Drug Discovery
- Structural Biology
Background:
- Infectious diseases remain a major cause of death, with Gram-negative bacteria posing a significant global threat due to antibiotic resistance.
- Developing novel antibacterial agents is crucial, but challenges exist in designing molecules that effectively penetrate Gram-negative bacteria.
- Outer membrane protein channels are key entry points for antibiotics, yet understanding their function in translocation is limited.
Purpose of the Study:
- To review recent experimental and computational advances in understanding the structure-function relationship of outer-membrane channels in Gram-negative pathogens.
- To highlight the role of these channels in antibiotic transport and intracellular accumulation.
- To address the lack of experimental techniques for measuring antibiotic uptake and concentration within bacterial cells.
Main Methods:
- Review of recent experimental studies on outer-membrane channel structure and function.
- Analysis of computational approaches for modeling antibiotic translocation.
- Discussion of techniques for measuring antibiotic uptake and intracellular concentration.
Main Results:
- Progress has been made in understanding the structure-function dynamics of outer-membrane channels.
- Experimental and computational methods are advancing the study of antibiotic transport mechanisms.
- Elucidating translocation rules is key to overcoming antibiotic resistance.
Conclusions:
- A deeper understanding of outer-membrane channel function is essential for designing effective antibiotics against Gram-negative bacteria.
- Improved experimental and computational techniques are needed to guide the development of novel antibacterial agents.
- Overcoming antibiotic resistance requires focused research on bacterial entry mechanisms.
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