Lipid diversity in clostridia
2021
Guan, Ziqiang | Goldfine, Howard
Studies of the lipidomes of twenty-one species of clostridia have revealed considerable diversity. Even among those species now defined as Clostridium sensu stricto, which are related to Clostridium butyricum, the type species, lipid analysis has shown that a number of distinct clades have characteristic polar lipids. All species of Clostridium sensu stricto have phosphatidylethanolamine, phosphatidylglycerol and cardiolipin which are present as all acyl or alk-1′-enyl acyl (plasmalogen) species. In addition, almost every clade has specialized polar lipids. For example, the group closely related to Clostridium beijerinckii and several other solventogenic species has glycerol acetals of plasmenylethanolamine, which protects the membrane bilayer arrangement when the lipids are highly unsaturated or in the presence of solvents. The group related to Clostridium novyi has aminoacyl-phosphatidylglycerol, which protects these pathogens from cationic antimicrobial peptides (CAMPs) of innate immunity. Clostridium botulinum species, which fall into several groups, align with these clades, and have the same specific lipids. This review will present the current state of knowledge on clostridial lipids.
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