Chimeric Collagen DNA for Controlled Hydroxylation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing biofabricated leather face challenges in efficiently producing collagen in quantities and forms needed for commercial applications, with a need for collagen sources that can mimic leather's aesthetics and functionalities, including varying degrees of strength, uniformity, and durability.
Innovation Solution
A chimeric bovine collagen DNA sequence optimized for expression in Pichia pastoris yeast, combined with a vector that includes a section encoding the amino acid sequence at the N-terminus and an unoptimized section encoding the amino acid sequence at the C-terminus, is used to produce hydroxylated collagen, allowing for different forms of collagen with selective hydroxylation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the entire collagen DNA sequence is optimized for expression in Pichia pastoris, then expression efficiency is improved, but the natural hydroxylation pattern is lost
Solution Approach 1:
The collagen DNA sequence is divided into two segments: an N-terminal portion (60-90% of sequence) that is codon-optimized for P. pastoris expression, and a C-terminal portion (10-40% of sequence) that remains unoptimized to preserve natural hydroxylation. This segmentation allows simultaneous achievement of high expression efficiency and natural hydroxylation patterns.
Solution Approach 2:
Different regions of the collagen molecule are assigned different qualities: the N-terminal region undergoes optimization for maximal expression yield, while the C-terminal region maintains its native sequence characteristics to ensure proper hydroxylation. This local differentiation resolves the contradiction between expression efficiency and hydroxylation preservation.
2Quantity of substance
If recombinant collagen is produced in traditional systems, then production scale is limited, but hydroxylation control is maintained
Solution Approach 1:
The invention changes the expression parameters by using a chimeric DNA sequence with selective optimization, enabling P. pastoris to produce collagen at high quantities while maintaining controlled hydroxylation. This parameter change allows the system to overcome the production limitations of traditional systems while preserving hydroxylation control.
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 approach enables the abundant expression of collagen in yeast, providing a range of collagen materials with controlled hydroxylation levels, suitable for producing biofabricated leathers with improved strength, uniformity, and durability.
Implementation Method 1
selective hydroxylation of the amino acid sequence of a bovine collagen molecule to provide a range of hydroxylated collagen materials
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Strains of yeast genetically engineered to produce increased amounts of non-hydroxylated collagen or hydroxylated collagen are described. A chimeric collagen DNA sequence, comprising from 10 to 40 percent or 60 to 90 percent of optimized DNA based on the total length of the chimeric collagen DN. An all-in-one vector including the DNA necessary to produce collagen, promotors, and hydroxylating enzymes is also described. Methods for producing non-hydroxylated or hydroxylated collagen are also provided.