A sensitive and robust method for quantification of intracellular short-chain coenzyme A esters

Area of Science:

• Microbiology
• Biochemistry
• Analytical Chemistry

Background:

• Intracellular coenzyme A (CoA) esters and adenine nucleotides are vital metabolites in microbial cells.
• Accurate quantification of these molecules is essential for understanding microbial metabolism and function.
• Existing methods may lack the sensitivity or efficiency for simultaneous analysis of these diverse compounds.

Purpose of the Study:

• To develop and describe a novel procedure for the simultaneous analysis of short-chain intracellular CoA esters and adenine nucleotide pools in microbial cells.
• To establish a sensitive method capable of detecting these metabolites at picomolar levels.

Main Methods:

• Simultaneous isolation, metabolic quenching, and metabolite extraction using silicone oil centrifugation into trichloroacetic acid.
• Neutralization and salt-free metabolite solution preparation via Freon extraction with tri-n-octylamine.
• High-performance liquid chromatography (HPLC) separation followed by post-column derivatization with bromoacetaldehyde.
• Fluorescent detection of 1,N6-ethenoadenine adducts for sensitive analysis.

Main Results:

• A robust procedure was established for the simultaneous extraction and analysis of CoA esters and adenine nucleotides.
• The method enables sensitive detection of target metabolites at picomolar concentrations using fluorescence detection.
• The developed technique effectively isolates and preserves labile intracellular metabolites.

Conclusions:

• The described method provides a sensitive and efficient approach for the simultaneous analysis of key microbial metabolites.
• This technique is valuable for research in microbial physiology, metabolism, and cellular biochemistry.
• The ability to detect metabolites at picomolar levels opens new avenues for detailed metabolic profiling.