Development of a nucleotide sugar purification method using a mixed mode column & mass spectrometry detection

Area of Science:

• Biochemistry
• Analytical Chemistry
• Separation Science

Background:

• Understanding enzymatic pathways requires analyzing nucleotide sugars, nucleoside di/triphosphates, and sugar-phosphates.
• Current methods for analyzing these compounds in enzymatic reaction mixtures can be complex.

Purpose of the Study:

• To develop a facile and rapid separation method for analyzing nucleotide sugars in enzymatic reaction mixtures.
• To establish a semi-preparative method for purifying nucleotide sugars.

Main Methods:

• Utilized a Primesep SB column leveraging hydrophobic and electrostatic interactions.
• Employed ammonium formate buffer compatible with mass spectrometry.
• Adopted negative ion mode mass spectrometry for detection of sugar phosphates, including fucose-1-phosphate.
• Optimized mobile phase conditions (pH, buffer concentration, organic modifier).
• Applied (19)F NMR for purity assessment of the purified fluorinated nucleotide sugar.

Main Results:

• Developed a rapid separation method for nucleotide sugars.
• Successfully purified 30mg of nucleotide sugar using a semi-preparative approach.
• Determined the purity of the collected fluorinated nucleotide sugar to be 99% via (19)F NMR.

Conclusions:

• The developed method provides an efficient means for analyzing and purifying nucleotide sugars.
• This technique enhances the understanding of enzymatic pathways involving nucleotide sugar synthesis.
• The high purity achieved is critical for downstream applications and accurate biochemical analysis.