GPDA Enzyme Conversion of Amino Sugars Without Phosphorylation

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Solution Overview

Problem

Existing methods for converting glucosamine to fructose and ammonia require multiple enzyme steps, which are inefficient and resource-intensive, and there is a need for a more direct and ecological process.

Innovation Solution

A one-step enzymatic process using a single glucosamine-6-phosphate deaminase (GPDA) enzyme, such as Ef-GPDA from Enterococcus faecalis, directly converts glucosamine to fructose and ammonia without a phosphorylation step.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If indirect enzymatic conversion using multiple enzymes is used, then the conversion can be achieved, but the process complexity increases and resource consumption increases

Engineering Contradiction:

Improveprocess simplicityVSAvoidnumber of enzyme steps

Core Design Contradiction:

Ease of manufactureVSDevice complexity

Solution Approach 1:

The patent combines multiple enzymatic functions into a single enzyme molecule. The engineered glucosamine deaminase contains both deaminase activity (converting glucosamine to fructose and ammonia) and phosphatase activity (removing phosphate groups) within one enzyme, eliminating the need for separate enzyme steps and simplifying the manufacturing process

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The engineered enzyme performs multiple functions simultaneously - it acts as both a deaminase and a phosphatase. This multi-functional enzyme can catalyze both the deamination of glucosamine and the hydrolysis of phosphate esters in the reaction pathway, making the system more efficient and reducing resource requirements

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of manufacture

If indirect enzymatic conversion using multiple enzymes is used, then the conversion can be achieved, but the energy consumption increases

Engineering Contradiction:

Improveenergy efficiencyVSAvoidenergy consumption

Core Design Contradiction:

Ease of manufactureVSUse of energy by stationary object

Solution Approach 1:

By merging multiple enzymatic activities into one enzyme, the system eliminates the need for multiple separate reaction steps, each requiring energy input for enzyme addition, mixing, and process control. The single enzyme performs all necessary conversions in one continuous process, significantly reducing energy consumption

Inventive Principle:

Principle #5Merging (Combining)

3Productivity

If indirect enzymatic conversion using multiple enzymes is used, then the conversion can be achieved, but the production time increases

Engineering Contradiction:

Improveconversion speedVSAvoidprocess duration

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The consolidation of multiple enzymatic steps into a single enzyme enables all conversions to occur simultaneously in one reaction vessel without the time delays associated with sequential processing. This eliminates transfer times, mixing times, and equilibration periods between steps, dramatically accelerating the overall conversion rate

Inventive Principle:

Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This process simplifies and speeds up the conversion, saving natural resources and energy, and provides a cost-effective alternative for industrial production of fructose and ammonia.

Implementation Method 1

Methodology Applied

Scientific EffectEnzymatic catalysis: Enzyme

Data Source

PatentUS12559740B2Process for the direct enzymatic conversion of amino sugars; enzyme and compositions for use in the process

Publication Date: 2026.02.24 GLYCOMICS & GLYCAN BIOENGINEERING RES CENT (GGBRC) COLLEGE OF FOOD SCI & TECH NANJING AGRI UNIV

AI summary

A process for converting amino sugar to fructose and ammonia using one enzyme. Also provided are compositions and enzymes for converting amino sugar to fructose and ammonia.