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Journal Article

An iso-15:0 O-alkylglycerol moiety is the key structure of the E-signal in Myxococcus xanthus

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Ahrendt, T., Dauth, C., & Bode, H. B. (2016). An iso-15:0 O-alkylglycerol moiety is the key structure of the E-signal in Myxococcus xanthus. MICROBIOLOGY-SGM, 162, 138-144. doi:10.1099/mic.0.000169.

Cite as: https://hdl.handle.net/21.11116/0000-000A-0536-4
The E-signal is one of five intercellular signals (named A- to E-signal) guiding fruiting body development in Myxococcus xanthus, and it has been shown to be a combination of the branched-chain fatty acid (FA) iso-15 : 0 and the diacylmonoalkyl ether lipid TG1. Developmental mutants HB015 (Delta bkd MXAN_4265::kan) and elbD (MXAN_1528::kan) are blocked at different stages of fruiting body and spore formation as they cannot form the required iso-FA or the actual ether lipid, respectively. In order to define the structural basis of the E-signal, different mono- and triglycerides containing ether or ester bonds were synthesized and used for complementation of these mutants. Here, the monoalkylglyceride DL-1-O-(13-methyltetradecyl)glycerol exhibited comparably high levels of complementation in both mutants, restoring fruiting body and spore formation, identifying iso-15 :0 O-alkylglycerol, part of the natural lipid TG1, as the 'signalophore' of E-signalling.