Paenibacillus Mannanase Stability in Detergents
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Solution Overview
Problem
There is a need for mannanases that are suitable for specific conditions and uses beyond the existing industrial enzymes, particularly for effective hydrolysis of mannans in detergents and industrial applications.
Innovation Solution
Development of recombinant mannanase variants with specific amino acid modifications and insertions, such as those described in the amino acid sequences provided, which exhibit enhanced stability and activity in the presence of surfactants and proteases, allowing for effective hydrolysis of mannans in various substrates like guar gum and locust bean gum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mannanases are used in detergent compositions, then they can hydrolyze mannans in gum stains, but they lose enzymatic activity rapidly at elevated temperatures and in the presence of surfactants and proteases
Solution Approach 1:
The patent applies parameter changes by modifying amino acid residues at specific positions in the mannanase protein sequence. Multiple amino acid substitutions are introduced at positions including 19, 38, 59, 67, 68, 71, 74, 97, 129, 167, 168, 184, 225, 228, 235, 242, 244, 258, and 261. These parameter changes in the protein structure enhance the enzyme's stability and maintain its activity under detergent conditions, including elevated temperatures and presence of surfactants and proteases.
2Adaptability or versatility
If existing industrial mannanases are used, then they can remove gum stains through hydrolysis, but they are not suitable for detergent cleaning compositions due to instability
Solution Approach 1:
The invention modifies the enzyme's amino acid sequence parameters to adapt it for detergent applications. Specific substitutions at positions 19, 38, 59, 67, 68, 71, 74, 97, 129, 167, 168, 184, 225, 228, 235, 242, 244, 258, and 261 transform the enzyme's properties, making it suitable for detergent cleaning compositions while maintaining its mannan hydrolysis capability.
Solution Approach 2:
The patent creates modified copies of existing mannanase sequences from Paenibacillus sp. By copying the basic enzyme structure and introducing specific amino acid modifications, the invention generates detergent-stable variants that retain the core functionality of the original enzyme while gaining enhanced stability in detergent conditions.
3Temperature
If mannanase activity is maintained at high temperatures, then cleaning effectiveness improves, but enzyme denaturation and loss of activity increases
Solution Approach 1:
The patent uses amino acid parameter changes to expand the enzyme's temperature tolerance. The substitutions at positions 19, 38, 59, 67, 68, 71, 74, 97, 129, 167, 168, 184, 225, 228, 235, 242, 244, 258, and 261 stabilize the protein structure at elevated temperatures, allowing the enzyme to maintain activity in hot water washing conditions without rapid denaturation.
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 recombinant mannanase variants demonstrate improved stability and activity at elevated temperatures and in the presence of detergents, maintaining significant enzymatic activity over time, making them suitable for diverse cleaning and industrial applications.
Implementation Method 1
mannanases from Paenibacillus sp., polynucleotides encoding the mannanases, and methods of use thereof. Compositions containing mannanases are suitable for use as detergents and for cleaning fabrics and hard surfaces... endo-β-mannanases that hydrolyze the backbone linkages to generate short chain manno-oligosaccharides
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
Disclosed herein are mannanases from Paenibacillus sp., polynucleotides encoding the mannanases, compositions containing the mannanases, and methods of use thereof. Compositions containing mannanases are suitable for use as detergents and for cleaning fabrics and hard surfaces, as well as in a variety of other industrial applications.