1887

Abstract

The E-signal is one of five intercellular signals (named A- to E-signal) guiding fruiting body development in , 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 (Δ MXAN_4265::) and (MXAN_1528::) 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 -1--(13-methyltetradecyl)glycerol exhibited comparably high levels of complementation in both mutants, restoring fruiting body and spore formation, identifying iso-15 : 0 -alkylglycerol, part of the natural lipid TG1, as the ‘signalophore’ of E-signalling.

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2016-01-01
2024-03-29
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