Characterization of oligocellulose synthesized by reverse phosphorolysis using different cellodextrin phosphorylases

Area of Science:

• Biotechnology
• Polymer Chemistry
• Enzymology

Background:

• Enzymatic synthesis offers an eco-friendly route to producing oligocellulose, a valuable biopolymer.
• Understanding oligocellulose's molar mass distribution is crucial for its application.
• Reverse phosphorolysis using cellodextrin phosphorylase is a key enzymatic method.

Purpose of the Study:

• To determine the molar mass distribution of oligocellulose synthesized via enzymatic reverse phosphorolysis.
• To investigate the influence of cellobiose concentration on oligocellulose chain length.
• To compare analytical techniques for oligocellulose molar mass determination.

Main Methods:

• Enzymatic synthesis of oligocellulose from cellobiose (CB) and α-glucose 1-phosphate using cellodextrin phosphorylase.
• Analysis of molar mass distribution using 1H NMR spectroscopy, MALDI-ToF MS, and SEC.
• Correlation of analytical results with varying CB concentrations.

Main Results:

• Oligocellulose molar mass distribution is directly dependent on the initial cellobiose concentration.
• MALDI-ToF MS and SEC yielded comparable results for molar mass distribution.
• Oligocellulose synthesized with 10 mM CB had an average DPn of ~7, while 0.2 mM CB resulted in an average DPn of ~14.

Conclusions:

• Enzymatic synthesis provides a controllable method for producing oligocellulose with specific chain lengths.
• MALDI-ToF MS is the preferred method for accurate and efficient molar mass distribution analysis of oligocellulose due to limitations with SEC.
• The findings offer insights into tailoring oligocellulose properties for diverse applications.