Identification of (S)-11-cycloheptyl-4-methylundecanoic acid in acylphosphatidylglycerol from Alicyclobacillus acidoterrestris

. 2009 Jun ; 159 (2) : 104-13. [epub] 20090213

Jazyk angličtina Země Irsko Médium print-electronic

Typ dokumentu časopisecké články, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/pmid19477317

A method is described for the identification of molecular species of acylphosphatidylglycerols containing a branched cyclo fatty acid ((S)-11-cycloheptyl-4-methylundecanoic acid; brc19:0) from Alicyclobacillus acidoterrestris and its identification as picolinyl ester by means of GC-MS. The combination of TLC, negative RP-HPLC-ESI-MS/MS, enzymatic hydrolysis, and GC-MS was used to identify unusual molecular species of acylphosphatidylglycerols with cyclic and branched FA. The acid, brc19:0, was also synthesized to unambiguously confirm its structure. According to feeding experiments with (13)C-labeled propionate, the C(3) internal unit (branched methyl) of brc19:0 is assembled from propionate and not from methionine.

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