Total synthesis and mass spectrometric analysis of a Mycobacterium tuberculosis phosphatidylglycerol featuring a two-step synthesis of (R)-tuberculostearic acid
作者:Satvika Burugupalli、Mark B. Richardson、Spencer J. Williams
DOI:10.1039/c7ob01786c
日期:——
We report the total synthesis of (R)-tuberculostearic acid-containing Mycobacterium tuberculosis phosphatidylglycerol (PG). The approach features a two-step synthesis of (R)-tuberculostearic acid, involving an (S)-citronellyl bromide linchpin, and the phosphoramidite-assisted assembly of the full PG structure. Collision-induced dissociation mass spectrometry of two chemically-synthesized PG acyl regioisomers
Total synthesis of a fully lipidated form of phosphatidyl-myo-inositol dimannoside (PIM-2) of Mycobacterium tuberculosis
作者:Asif Ali、Markus R. Wenk、Martin J. Lear
DOI:10.1016/j.tetlet.2009.07.109
日期:2009.10
Using an orthogonal protecting group approach to resolve racemic myo-inositol directly as its D-mannoside, we report a [2+n]-glycan/phosphatidylation strategy to assemble a bis-palmityl, tuberculostearyl form of phosphatidyl-myo-inositol dimannoside (PIM-2). (C) 2009 Elsevier Ltd. All rights reserved.
Asymmetric synthesis and structure elucidation of a glycerophospholipid from Mycobacterium tuberculosis
作者:Bjorn ter Horst、Chetan Seshadri、Lindsay Sweet、David C. Young、Ben L. Feringa、D. Branch Moody、Adriaan J. Minnaard
DOI:10.1194/jlr.m001982
日期:2010.5
A glycerophospholipid (1-O-tuberculostearoyl-2-O -palmitoyl-sn-glycero-3-phosphoethanolamine) from Mycobacterium tuberculosis was isolated from the reference strain H37Rv. The molecular structure of this tuberculostearoyl [(R)-10-methyloctadecyl] and palmitoyl containing phosphatidylethanolamine (PE) has been resolved. The substitution pattern on the glycerol backbone could be determined by comparison of the isolate to the two synthetically prepared regioisomers. MS/MS analysis was used to determine its molecular structure. Production of this synthetic version of mycobacterial PE in high yield, with a stereochemically correct and pathogen-specific fatty acyl group, can be used as a standard in LC-MS based lipidomic analyses to detect trace amounts of mycobacterial PE in human blood, sputum, or tissues as a marker of infection by mycobacteria.-ter Horst, B., C. Seshadri, L. Sweet, D. C. Young, B. L. Feringa, D. B. Moody, and A. J. Minnaard. Asymmetric synthesis and structure elucidation of a glycerophospholipid from Mycobacterium tuberculosis. J. Lipid Res. 2010. 51: 1017-1022.