bacterial cells

Antibiotics are types of antimicrobial products used for the treatment and prevention of bacterial infections. Antibiotics can kill or inhibit bacterial growth. Although the target of an antibiotic is bacteria, some antibiotics also attack fungi and protozoans. However, antibiotics rarely have an effect on viruses. The major mechanism underlying antibiotics is the inhibition or regulation of enzymes involved in cell wall biosynthesis, nucleic acid metabolism and repair, protein synthesis, or disruption of membrane structure. Many of these cellular functions targeted by antibiotics are most active in multiplying cells. Since there is often overlap in these functions between prokaryotic bacterial cells and eukaryotic mammalian cells, it is not surprising that some antibiotics have also been found to be useful as anticancer agents.

MCE supplies a unique collection of 752 antibiotics, including penicillins, cephalosporins, tetracyclines, macrolides, etc. MCE Antibiotics Library is a useful tool for anti-bacterial or anti-cancer drugs discovery.

Antibacterial agents are a group of materials that fight against pathogenic bacteria. Thus, by killing or reducing the metabolic activity of bacteria, their pathogenic effect in the biological environments will be minimized. The most widely used antibacterial agents exert their effects on bacterial cell wall synthesis, protein synthesis, DNA replication and metabolic pathways. However, resistance to antimicrobial agents has become a major source of morbidity and mortality worldwide. The main mechanisms of resistance are limiting uptake of a drug, modification of a drug target, inactivation of a drug, and active efflux of a drug. Therefore, it is an urgent need to develop new drugs targeted at resistant organisms.

MCE offers a unique collection of 1,904 compounds with validated antibacterial activities. MCE antibacterial compound library is an effective tool for drug repurposing screening, combination screening and biological investigation.

The rising prevalence of multidrug-resistant and extensively drug-resistant bacteria, combined with emerging resistance mechanisms and the limitations of existing antibacterial drugs, creates an urgent need for novel antibacterial agents. Antibacterial compound libraries serve as key tools to support antibacterial drug screening and development.

This library features structurally diverse compounds, including small-molecule scaffolds and natural product derivatives, and exhibits diverse antibacterial mechanisms of action. For example, these compounds exert antibacterial effects by disrupting bacterial cell structures, interfering with bacterial metabolic processes, and inhibiting nucleic acid synthesis. The derivation of scaffold structures enhances their activity against drug-resistant bacteria and their selectivity against different types of bacteria. This library can be used for the high-throughput screening of novel antibacterial drug candidates and the identification of potent compounds against drug-resistant and multidrug-resistant bacteria. Additionally, it provides a reference for compound structural modification, enabling further in-depth research on the structure-activity relationships(SARs) of antibacterial drugs. It can also be applied to the exploration of bacterial resistance mechanisms and reversal strategies, as well as the discovery of antibacterial molecules that inhibit efflux pumps and restore drug susceptibility.

The library contains 10855 structurally diverse drug-like compounds. Its core compound sources include analogs of known antifungal active moleculeswith a similarity score of ≥ 0.6. MCE has collected more than 1900 antibacterial molecules. All screened compounds conform to lead-like physicochemical properties, providing valuable support for the research and development of novel antibacterial drugs.

Programmed cell death pathways, including apoptosis, pyroptosis and necroptosis, are regulated by unique sets of host proteins that coordinate a variety of biological outcomes. Pyroptosis is a highly inflammatory form of programmed cell death that occurs most frequently upon infection with intracellular pathogens and is likely to form part of the antimicrobial response. This process promotes the rapid clearance of various bacterial, viral, fungal and protozoan infections by removing intracellular replication niches and enhancing the host's defensive responses. Pyroptosis has been widely studied in inflammatory and infection disease models. Recently, there are growing evidences that pyroptosis also plays an important role in the development of cancer, cardiovascular diseases and Metabolic disorder, etc.

MCE designs a unique collection of 1,885 pyroptosis-related compounds mainly focusing on the key targets in the pyroptosis signaling pathway and can be used in the research of pyroptosis signal pathway and related diseases.

In the research of covalent inhibitors targeting serine and threonine, scientists have found that the nucleophilicity of these hydroxyl groups is significantly enhanced due to the influence of their surrounding environment. This results in higher activity during catalytic reactions. Aspirin, which targets the non-catalytic domain serine (Ser529 in human COX1) of cyclooxygenase, exerts its anti-inflammatory effect through covalent binding. β-lactam antibiotics, which targets the catalytic domain serine of penicillin-binding proteins, interferes with bacterial cell wall synthesis.

Through careful selection, we constructed a structural filter containing over 110 electrophilic groups. By analyzing the electrophilic fragments selected by the structural filter, we removed any molecules with trivial or undesirable structural features. Ultimately, we obtained 3,300 fragment molecules which can target serine and threonine residues and can be used for fragment-based covalent drug discovery.

MCE Anti-Flag Affinity Gel is used for immunoprecipitation (IP) or protein purification of specific Flag-tagged (DYKDDDDK) proteins expressed in bacterial and mammalian cells and in vitro expression systems.

MCE G418 Selective Antibiotic, Sterile (50 mg/mL) is an aminoglycoside antibiotic produced by Micromonospora rhodorangea. It acts by binding to the 80S subunit of the bacterial ribosome, thus inhibiting protein synthesis in both prokaryotic and eukaryotic cells.

MCE Hygromycin B, Sterile (50 mg/mL) is a filtered and sterilized antibiotic solution that can be used directly in cell culture.Hygromycin B is an aminoglycosidic antibiotic purified from Streptomyces hygroscopicus. It acts by binding to the 70S subunit of the bacterial ribosome and inhibiting protein synthesis, leading to the death of bacteria, fungi and mammalian cells.

MCE Penicillin-Streptomycin (100×), Sterile is used to prevent bacterial contamination of cell culture due to their effective combined action against gram-positive and gram-negative bacteria, which contains 10,000 units/mL of penicillin and 10 mg/mL of streptomycin.

MCE Anti-GST Magnetic Beads are used for immunoprecipitation (IP) of specific GST-tagged proteins expressed in bacterial and mammalian cells and in vitro expression systems. The 1 mL is defined as the base specification. All larger sizes correspond to incremental volumes of this base.

MCE Anti-His Magnetic Beads are used for immunoprecipitation (IP) of specific His-tagged proteins expressed in bacterial and mammalian cells and in vitro expression systems. The 1 mL is defined as the base specification. All larger sizes correspond to incremental volumes of this base.

MCE Anti-HA Magnetic Beads are used for immunoprecipitation (IP) of specific HA-tagged proteins expressed in bacterial and mammalian cells and in vitro expression systems.The 1 mL volume is defined as the base specification. All larger sizes correspond to incremental volumes of this base.

MCE Anti-c-Myc Magnetic Beads are used for immunoprecipitation (IP) of specific c-Myc-tagged proteins expressed in bacterial and mammalian cells and in vitro expression systems. The 1 mL is defined as the base specification. All larger sizes correspond to incremental volumes of this base.

MCE Anti-HA Magnetic Beads (1 μm) are used for immunoprecipitation (IP) of specific HA-tagged proteins expressed in bacterial and mammalian cells andin vitro expression systems. The 1 mL is defined as the base specification. All larger sizes correspond to incremental volumes of this base.

MCE Gentamicin, Sterile (10 mg/mL) is a filtered and sterilized antibiotic solution that can be used directly in cell culture. Gentamicin acts by binding to the 30S subunit of the bacterial ribosome leading to inhibition of protein synthesis and death in susceptible bacteria, mainly for gram-negative and gram-positive bacteria.

MCE Penicillin-Streptomycin-Glutamine (100×), sterile is used to prevent bacterial contamination of cell culture due to their effective combined action against gram-positive and gram-negative bacteria, which contains 10,000 units/mL of penicillin, 10 mg/mL of streptomycin, and 29.2 mg/mL of Glutamine.

MCE Penicillin-Streptomycin-Neomycin (PSN) (100×), Sterile is used to prevent bacterial contamination of cell culture due to their effective combined action against gram-positive and gram-negative bacteria, which contains 5,000 units/mL of penicillin, 5 mg/mL of streptomycin, and 10 mg/mL of Neomycin.

MCE Anti-Flag Magnetic Beads are used for immunoprecipitation (IP) of specific Flag-tagged (DYKDDDDK) proteins expressed in bacterial and mammalian cells and in vitro expression systems, and also suitable for Co-immunoprecipitation and purification of Flag-tagged protein. The 1 mL is defined as the base specification. All larger sizes correspond to incremental volumes of this base.