Related Experiment Video
Updated: Sep 19, 2025
08:19
Generating Transposon Insertion Libraries in Gram-Negative Bacteria for High-Throughput Sequencing
Published on: July 7, 2020
10.7K
Advances in Small Molecule Inhibitors Targeting the Bacterial Lipoprotein Transport System (Lol) in Gram-Negative
1Infectious Diseases Therapeutic Research Center, Division of Medicinal Chemistry and Pharmacology, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, Republic of Korea.
Chemistry, an Asian Journal
|June 19, 2025
Summary
Novel antibiotics targeting the bacterial lipoprotein transport system (Lol) show promise against multidrug-resistant gram-negative bacteria. Inhibiting the LolABCDE complex disrupts outer membrane integrity, leading to bacterial cell death and offering a new strategy against antimicrobial resistance.
Area of Science:
- Microbiology
- Drug Discovery
- Biochemistry
Background:
- Antimicrobial resistance (AMR) is a growing global health threat, especially from multidrug-resistant gram-negative bacteria.
- Gram-negative bacteria possess outer membrane defenses and efflux pumps that limit antibiotic effectiveness.
- The lipoprotein transport system (Lol) is essential for bacterial viability and outer membrane integrity.
Purpose of the Study:
- To review recent advances in small-molecule inhibitors targeting the Lol system.
- To examine LolABCDE complex function, structure, and biochemical characteristics.
- To explore the therapeutic potential of Lol system inhibition against gram-negative infections.
Main Methods:
- Literature review of recent studies on Lol system inhibitors.
- Analysis of LolABCDE complex mechanisms and component characteristics.
- Summary of inhibitor discovery, optimization, and resistance mechanisms.
Main Results:
- Small-molecule inhibitors targeting the Lol system have been developed.
- Disruption of the LolABCDE complex leads to bacterial cell death.
- Progress has been made in understanding inhibitor modes of action and resistance.
Conclusions:
- Targeting the Lol system is a promising strategy against gram-negative bacterial infections and AMR.
- Challenges include drug permeability and emerging resistance.
- Further strategies are needed to enhance inhibitor selectivity and overcome bacterial defenses.
Keywords:
AntibioticsGram‐negative bacteriaLipoprotein transport systemLolABCDESmall‐molecule inhibitorsMore Related Videos
Related Concept Videos
01:19Formation of Lipopolysaccharides
110
Lipopolysaccharides (LPS) are crucial components of the outer membrane of Gram-negative bacteria, serving both structural and functional roles. It contributes to membrane stability and protects bacteria from host immune responses. LPS is composed of three major regions—lipid A, a core oligosaccharide, and an O antigen. The biosynthesis and assembly of LPS involve a highly coordinated set of enzymatic reactions and transport mechanisms. Additionally, LPS is recognized as an endotoxin,...
110
01:17Gram-negative Bacterial Protein Secretion Systems
167
Gram-negative bacteria utilize sophisticated protein secretion systems to transport proteins across their double-membrane envelope into the extracellular environment or host cells. Based on their mechanism of action, these systems are classified into one-step and two-step pathways.One-Step Secretion Systems (Types I, III, IV, and VI)One-step secretion systems bypass the periplasm entirely, forming a continuous channel that spans both the inner and outer membranes:Type I Secretion System (T1SS):...
167
01:26Bacterial Translocation and Protein Secretion
92
Bacterial protein secretion involves translocation systems to ensure proteins reach their designated locations, including the plasma membrane, periplasm, outer membrane, or the external environment. These translocation systems are vital for bacterial physiology, supporting processes like membrane assembly, enzymatic activity in the periplasm, and interactions with the external environment. The division of labor between Sec and Tat pathways ensures efficiency in handling proteins with diverse...
92
01:28Gene Regulation in Microbial Communities: Quorum Sensing
97
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
97
01:23Antimicrobial Proteins
6.4K
Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
6.4K
01:28Biological Methods for Microbial Control
218
Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
218