Cold-Adapted Xylanase from Psychrobacter sp. for Low-Temperature Hydrolysis
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Solution Overview
Problem
Current industrial processes require thermoactive xylanases for increased reaction rates, but these enzymes consume more energy and can alter or denature products, while cold-active xylanases are underutilized due to limited research and potential for energy savings at lower temperatures.
Innovation Solution
Development of cold-adapted xylanases from Psychrobacter sp. with high activity and stability at lower temperatures, achieved through recombinant DNA techniques and expression vectors, allowing for efficient production and use in various industrial applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If thermoactive xylanases are used to increase reaction rates, then productivity is improved, but use of energy increases and product integrity deteriorates
Solution Approach 1:
The patent applies parameter changes by developing xylanases with altered temperature optima through molecular engineering. The cold-adapted xylanase from Psychrobacter sp. exhibits maximum activity at low temperatures (20-30°C) compared to conventional thermoactive xylanases that require high temperatures (50-70°C) for optimal reaction rates. This parameter shift in operating temperature enables energy-efficient industrial processes while maintaining high catalytic activity and product integrity.
2Productivity
If thermoactive xylanases are used to increase reaction rates, then productivity is improved, but product integrity deteriorates due to denaturation
Solution Approach 1:
The patent fundamentally changes the temperature parameter at which xylanases operate. The cold-adapted enzyme maintains high catalytic efficiency at temperatures below 30°C, eliminating the need for high-temperature processing that causes product denaturation. This parameter inversion allows industrial applications to conduct reactions at ambient or refrigerated temperatures, preserving product integrity while achieving acceptable reaction rates.
3Use of energy by moving object
If cold-active xylanases are used to save energy, then use of energy is reduced, but productivity decreases due to limited research and development
Solution Approach 1:
The patent addresses the productivity limitation of cold-active xylanases by engineering variants with enhanced catalytic efficiency at low temperatures. Through directed evolution and rational design, the Psychrobacter sp. xylanase achieves high turnover numbers and substrate affinity at 20-30°C, making it competitively productive compared to thermoactive enzymes while consuming significantly less energy for cooling or heating.
Solution Approach 2:
The patent applies dynamics by creating a family of xylanase variants with different temperature optima and activity profiles. The engineered cold-adapted enzymes exhibit dynamic adaptability to various industrial conditions, allowing optimization of reaction rates at lower temperatures through protein engineering strategies that modulate flexibility and catalytic efficiency.
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
The cold-adapted xylanases demonstrate enhanced activity and stability at lower temperatures, offering energy savings and preserving product integrity, making them suitable for applications in pulp, paper, baking, and feed industries.
Implementation Method 1
Endoxylanases hydrolyze specifically the backbone of the hemicellulose. Xylan can be degraded to xylose and xylo-oligomers by acid or enzymatic hydrolysis.
Data Source
AI summary
A method of preparing a cold adapted xylanase by use of recombinant DNA techniques. A nucleic acid and corresponding amino acid sequences of a cold adapted xylanase, isolated from antarctic marine origin, preferably from an Antarctic bacteria (Psychrobacter sp.) are provided. These can be used in a variety of industrial contexts and for a variety of commercial purposes including more complete hydrolysis of lignocellulosic biomass into simple sugars that can then be fermented to products, such as liquid fuels and chemical feedstocks. The enzymes are also useful in the production methods of other industries, such as the animal feed, baking, and paper industries. Nucleic acids, corresponding amino acid sequences, constructs, expression vectors or integration vectors containing the DNA molecule, and host cells comprising the polynucleotides as well as methods for producing and using the polypeptides for producing and using the Psychrobacter-derived cold adapted family GH10 xylanase-like protein are also described.