ArticleBio-protocol2019
Purification and HPLC Analysis of Cell Wall Muropeptides from
Article in Bio-protocol, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The peptidoglycan sacculus, or cell wall, is what defines bacterial cell shape. Cell wall composition can be best characterized at the molecular level by digesting the peptidoglycan murein polymer into its muropeptide subunits and quantifying the abundance of muropeptides using high-pressure liquid chromatography. Certain features of the cell wall including muropeptide composition, glycan strand length, degree of crosslinking, type of crosslinking and other peptidoglycan modifications can be quantified using this approach. Well-established protocols provide us with highly-resolved and quantitatively reproducible chromatographic data, which can be used to investigate bacterial cell wall composition under a variety of environmental or genetic perturbations. The method described here enables the purification of muropeptide samples, their quantification by HPLC, and fraction collection for peak identification by mass spectrometry. Although the methods for peptidoglycan purification and HPLC analysis have been previously published, our method includes important details on how to re-equilibrate the column between runs to allow for automated analysis of multiple samples.
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