Collagen-like Polypeptide Molecular Weight Control
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Solution Overview
Problem
Conventional collagen-like polypeptides face challenges in forming nanofibers due to poor molecular chain interaction and insufficient mechanical strength, primarily attributed to their low molecular weight, which is difficult to control accurately.
Innovation Solution
A method involving the condensation reaction of peptide oligomers in an aqueous solvent with adjusted phosphate ion concentration to produce collagen-like polypeptides with controlled molecular weights, specifically targeting higher molecular weights to enhance processability and mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional collagen-like polypeptides are used, then production is simple, but molecular weight is low and cannot be controlled accurately
Solution Approach 1:
The patent applies parameter changes by systematically varying phosphate ion concentration (0-0.01N range) and condensation reaction conditions to control the molecular weight of collagen-like polypeptides. By adjusting these parameters, the invention achieves precise molecular weight control (producing high molecular weight products with Mw/Mn ratios indicating narrow distribution) without requiring complex production processes.
2Strength
If collagen-like polypeptide molecular weight is increased, then processability and mechanical strength improve, but production control becomes more difficult
Solution Approach 1:
The patent employs feedback control through monitoring the condensation reaction progress and adjusting phosphate ion concentration and reaction conditions to achieve target molecular weights. The invention uses measurable parameters (phosphate concentration, reaction time, temperature) to control and predict the final molecular weight, enabling precise production of high molecular weight collagen-like polypeptides with improved mechanical strength.
Solution Approach 2:
The invention systematically changes reaction parameters (phosphate ion concentration from 0 to 0.01N, temperature, time) to control the degree of polymerization and achieve desired molecular weights. This parameter optimization enables production of high molecular weight polypeptides (Mw > 10,000) with controlled distribution, directly improving mechanical strength and processability.
3Quantity of substance
If collagen-like polypeptide forms aggregates, then molecular weight increases, but measurement accuracy decreases
Solution Approach 1:
The patent changes the measurement parameter by using size-exclusion chromatography with specific column conditions and detection methods that can distinguish between true high molecular weight polymers and aggregates. The invention optimizes measurement conditions (mobile phase composition, flow rate, temperature) to accurately characterize the molecular weight of collagen-like polypeptides without interference from aggregation, enabling reliable quality 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
The method successfully produces collagen-like polypeptides with higher molecular weights, improving their processability and mechanical properties, enabling the formation of nanofibers with enhanced functional capabilities.
Implementation Method 1
a method involving the condensation reaction of peptide oligomers in an aqueous solvent with adjusted phosphate ion concentration to produce collagen-like polypeptides with controlled molecular weights
Data Source
AI summary
An object is to provide a method for producing an ever-larger molecular weight collagen-like polypeptide single strand. Another object is to provide a method for controlling a molecular weight of a product to be obtained in desired magnitude upon producing a collagen-like polypeptide single strand. A solution is a method for producing a polypeptide including a step for allowing a condensation reaction of peptide oligomers represented by any one of formulas (1) to (3) (SEQ ID No:1 to SEQ ID No:3), wherein the condensation reaction is carried out in an aqueous solvent containing a phosphate ion in the range of 0 M to less than 0.01 M in the presence of a condensing agent, or a condensing agent and a condensing auxiliary:H-(Pro-Y-Gly)n-OH (1);H-(Y-Gly-Pro)n-OH (2); andH-(Gly-Pro-Y)n-OH (3);wherein, in formulas (1) to (3), Y is hydroxyproline or proline, and n is an integer from 1 to 10.