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

机译:酸脂环芽孢杆菌酰基磷脂酰甘油中(S)-11-环庚基-4-甲基十一酸的鉴定

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摘要

Amethod 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 bymeansofGC–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 13C-labeled propionate, the C3 internal unit (branched methyl) of brc19:0 is assembled from propionate and not from methionine.
机译:描述了一种方法,该方法用于鉴定来自酸热脂环酸杆菌的含有支链环脂肪酸((S)-11-环庚基-4-甲基十一酸;(brc19:0))的酰基磷脂酰甘油的分子种类,并通过GC-MS的方法鉴定为吡啶甲酸酯。薄层色谱,阴性RP-HPLC-ESI-MS / MS,酶解和GC-MS的鉴定用于鉴定具有环状和支链FA的酰基磷脂酰甘油的不寻常分子种类。还合成了酸brc19:0,以明确确认其结构。根据13C标记丙酸酯的进料实验,brc19:0的C3内部单元(支链甲基)是由丙酸酯而不是蛋氨酸组装而成的。

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