Bacterial cell membrane lipid domains (FMMs)

Bacterial cell membrane lipid domains, also known as functional membrane microdomains (FMMs), are highly organized regions within the bacterial cytoplasmic membrane that facilitate the clustering of proteins involved in essential cellular processes (Lopez & Kolter, 2010, Genes & Dev). These domains are analogous to eukaryotic lipid rafts and are typically enriched in specific lipids, such as hopanoids or cardiolipin, and scaffolding proteins like flotillins (Wagner et al., 2017, Nat Rev Microbiol). FMMs play a pivotal role in organizing signal transduction pathways, protein secretion systems, and the machinery required for cell wall biosynthesis (Mielich-Süss et al., 2017, Front Cell Dev Biol). Because many virulence factors and antibiotic resistance proteins, such as PBP2a in Methicillin-resistant Staphylococcus aureus (MRSA), localize to these domains, they have emerged as a promising target for antimicrobial therapy (Lopez & Kolter, 2010, Genes & Dev). Disrupting the integrity of FMMs can lead to the disassembly of these protein complexes, effectively sensitizing bacteria to existing antibiotics or directly inhibiting their growth (Schneider et al., 2010, PNAS). This approach is particularly attractive for addressing multi-drug resistant pathogens where traditional targets have been bypassed.

Other names

Functional membrane microdomainsBacterial lipid raftsMembrane microdomainsFlotillin-associated domainsDetergent-resistant membranes

Disruption of the spatial organization of membrane-associated proteins and lipids, leading to the dissociation of functional complexes involved in cell wall synthesis and signaling (Lopez & Kolter, 2010, Genes & Dev).