Chemoenzymatic syntheses of water-soluble lipid I fluorescent probes
[Display omitted] Peptidoglycan (PG) is unique to bacteria, and thus, the enzymes responsible for its biosynthesis are promising antibacterial drug targets. The membrane-embedded enzymes in PG remain significant challenges in studying their mechanisms due to the fact that preparations of suitable en...
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Published in | Tetrahedron letters Vol. 56; no. 23; pp. 3441 - 3446 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
OXFORD
Elsevier Ltd
03.06.2015
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | [Display omitted]
Peptidoglycan (PG) is unique to bacteria, and thus, the enzymes responsible for its biosynthesis are promising antibacterial drug targets. The membrane-embedded enzymes in PG remain significant challenges in studying their mechanisms due to the fact that preparations of suitable enzymatic substrates require time-consuming biological transformations or chemical synthesis. Lipid I (MurNAc(pentapeptide)-pyrophosphoryl prenol) is an important PG biosynthesis intermediate to study the central enzymes, translocase I (MraY/MurX) and MurG. Lipid I isolated from nature contains the C50- or C55-prenyl unit that shows extremely poor water-solubility that renders studies of translocase I and MurG enzymes difficult. We have studied biological transformation of water soluble lipid I fluorescent probes using bacterial membrane fractions and purified MraY enzymes. In our investigation of the minimum structural requirements of the prenyl phosphates in MraY-catalyzed lipid I synthesis, we found that (2Z,6E)-farnesyl phosphate (C15-phosphate) can be recognized by Escherichia coli MraY to generate the water-soluble lipid I fluorescent probe in high-yields. Under the optimized conditions, the same reaction was performed by using the purified MraY from Hydrogenivirga spp. to afford the lipid I analog with high-yields in a short reaction time. |
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Bibliography: | Medline NIH RePORTER ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 This paper is dedicated to the memory of Professor Harry H. Wasserman, an inspirational scientist. |
ISSN: | 0040-4039 1873-3581 |
DOI: | 10.1016/j.tetlet.2015.01.044 |