First separation of commendamide enantiomers

Area of Science:

• Biochemistry
• Analytical Chemistry
• Pharmacology

Background:

• N-(3-hydroxyacyl)glycines, like commendamide, are bioactive gut microbiota metabolites structurally similar to endocannabinoidome lipids.
• These compounds interact with mammalian physiology and pathology, potentially via G-protein-coupled receptors (GPCRs).
• Chirality of N-(3-hydroxyacyl)glycines is crucial for understanding enantioselective biological processes, yet methods for obtaining pure enantiomers were lacking.

Purpose of the Study:

• To develop and report the first direct enantioseparation method for commendamide and its analogues.
• To enable access to pure enantiomers of N-(3-hydroxyacyl)glycines for further biological investigation.
• To explore the molecular basis of enantiomer retention and selectivity using computational analysis.

Main Methods:

• Enantioselective high-performance liquid chromatography (HPLC) using polysaccharide-based chiral columns.
• Utilized aqueous-organic mobile phases with either electrospray ionization mass spectrometry (ESI-MS) or UV detection.
• Employed computational analysis to investigate retention and selectivity differences between analogues.

Main Results:

• Successful direct separation of commendamide enantiomers was achieved.
• Optimal enantioseparation was obtained using an amylose tris(3,5-dimethylphenylcarbamate) column with acetonitrile/water (60:40, 0.1% acetic acid).
• The developed method was also effective for enantioseparation of the N-(3-hydroxymyristoyl)glycine analogue.

Conclusions:

• This study presents the first successful enantioseparation of commendamide and its analogue via chiral HPLC.
• The developed method provides access to enantiomerically pure N-(3-hydroxyacyl)glycines, crucial for studying their biological roles.
• Computational analysis offered insights into the molecular factors governing the separation of these bioactive lipids.