Beta-1,3-Galactanase Polypeptides for Selective Coffee Carbohydrate Solubilization
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Solution Overview
Problem
Current methods for cloning and expressing exo-beta-1,3-galactanase from Irpex lacteus in Pichia pastoris are not efficient for selective and effective solubilization of carbohydrates from coffee, particularly lacking in specific enzymes with beta-1,3-galactanase activity.
Innovation Solution
Development of polypeptides with beta-1,3-galactanase activity, including variants and fragments, encoded by polynucleotides with specific sequence identities, for use in coffee extraction, utilizing recombinant expression vectors and host cells to produce and isolate these enzymes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If current cloning and expression methods from Irpex lacteus are used in Pichia pastoris, then beta-1,3-galactanase activity is obtained, but the solubilization of carbohydrates from coffee is not selective and efficient
Solution Approach 1:
The patent applies local quality by creating polypeptide variants with specific modifications at particular positions (e.g., positions 43, 44, 66, 67, 106, 107, 146, 147, 186, 187, 226, 227, 266, 267) to enhance specific substrate binding properties. These localized amino acid changes improve the enzyme's selectivity for coffee carbohydrates while maintaining overall catalytic efficiency, resolving the contradiction between productivity and selectivity.
Solution Approach 2:
The patent employs parameter changes by systematically varying amino acid sequences through defined substitutions, deletions, and insertions to optimize enzyme performance. By modifying sequence identity thresholds (65%, 70%, 75%, 80%, 85%, 90%, 95%, 98%, 99% identity to SEQ ID NO:2) and creating multiple variant classes, the patent achieves both high solubilization efficiency and improved selectivity for coffee carbohydrate extraction.
2Reliability
If polypeptide variants with multiple amino acid modifications are created, then selectivity is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the polypeptide modification strategy into distinct, manageable classes (Classes I-XIV) based on specific amino acid position changes. Each class represents a modular approach to variant creation, allowing systematic exploration of selectivity improvements without overwhelming complexity. This segmented classification makes the complex variant library organized and manageable.
Solution Approach 2:
The patent achieves universality by creating a family of polypeptide variants that all maintain beta-1,3-galactanase activity while having different combinations of amino acid modifications. The core enzyme structure remains universal across all variants, with specific positions serving multiple potential modification types (substitution, deletion, insertion), allowing one polypeptide backbone to serve multiple selective functions.
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 produced polypeptides effectively hydrolyze beta-1,3-galactan and beta-1,3-galactooligosaccharides, enhancing the solubilization of carbohydrates in coffee extraction processes, as quantified by reducing sugar assays.
Implementation Method 1
The produced polypeptides effectively hydrolyze beta-1,3-galactan and beta-1,3-galactooligosaccharides
Implementation Method 2
polypeptides having beta-1,3-galactanase activity
Data Source
AI summary
The present invention relates to polypeptides having beta-1,3-galactanase activity and polynucleotides encoding the polypeptides. The invention also relates to nucleic acid constructs, vectors, and host cells comprising the polynucleotides as well as methods of producing and using the polypeptides.