Actagardin (CAS 59165-34-3)

Actagardin, bearing the CAS number 59165-34-3, is a complex glycopeptide antibiotic isolated from Actinoplanes liguriae. It is recognized for its distinctive bicyclic structure, which includes a central heptapeptide lactone ring linked to sugar moieties, contributing to its biological activity. Actagardin functions primarily by inhibiting the synthesis of bacterial cell walls, a mechanism it shares with other glycopeptide antibiotics. It achieves this by binding tightly to the D-alanyl-D-alanine terminus of cell wall precursor units, thereby inhibiting the transpeptidation and transglycosylation steps essential for building the bacterial cell wall. This interaction effectively prevents the incorporation of these precursors into the peptidoglycan matrix, leading to a cessation of cell wall synthesis and resulting in bacterial cell death due to osmotic instability. In research, actagardin has been utilized as a tool to explore the biosynthesis and mode of action of glycopeptide antibiotics, particularly in understanding the specificity and binding affinity of these compounds to their target sites. Additionally, studies involving actagardin have focused on the genetic and enzymatic pathways involved in its biosynthesis, providing insights into antibiotic production in Actinoplanes species. This research is critical for advancing our understanding of antibiotic resistance mechanisms and for guiding the development of novel antibiotics to combat resistant bacterial strains.