Deamidation Rate Measurement Kit Using Model Protein Mediators
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Solution Overview
Problem
Current methods cannot effectively measure the protein deamidation rate in complex biological samples such as blood plasma, serum, saliva, or tissue extracts, limiting their application in medical diagnostics and pharmaceutical stability assessment.
Innovation Solution
A deamidation rate measurement kit containing stock solutions of Boc-Asn-Gly-OEt and Boc-Asp-Gly-OEt compounds in deionized/distilled water, used as calibrators and analytical standards, allows for the measurement of protein deamidation by tracking the spontaneous conversion of these compounds using LC-MS, enabling analysis in biological samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing deamidation measurement methods are used, then deamidation of purified proteins can be measured, but they cannot be used for complex biological samples such as blood plasma
Solution Approach 1:
The patent introduces a model protein (BSA) as an intermediary substrate that reacts with deamidating agents in biological samples. This model protein serves as a mediator between the complex biological sample matrix and the detection system, allowing indirect measurement of deamidation activity while avoiding interference from the sample matrix. The model protein undergoes controlled deamidation that can be quantified, thus enabling measurement in previously inapplicable sample types.
2Adaptability or versatility
If deamidation measurement is performed in complex biological matrices, then broader diagnostic applications are enabled, but measurement accuracy and reliability decrease
Solution Approach 1:
The patent extracts and isolates the deamidation activity from complex biological samples by using a model protein substrate that specifically reacts with deamidating agents. This extraction approach separates the measurement of deamidation activity from the interfering components of biological matrices, allowing reliable quantification of deamidation rates even in complex samples like blood plasma, serum, and tissue extracts.
3Measurement precision
If purified protein systems are used for deamidation studies, then measurement control is improved, but physiological relevance and diagnostic value are reduced
Solution Approach 1:
The model protein serves as an intermediary that bridges the gap between controlled in vitro conditions and complex in vivo environments. It provides the measurement control of purified systems while being exposed to the physiological deamidating agents present in biological samples, thus maintaining both experimental control and physiological relevance.
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
Enables accurate measurement of protein deamidation rates in biological samples, facilitating the detection of factors influencing aging and age-related diseases, and the assessment of pharmaceutical stability, providing a marker for early disease diagnosis and intervention.
Implementation Method 1
Protein deamidation can occur enzymatically or spontaneously. As a result of deamidation, changes occur in the structure and charge of proteins.
Data Source
AI summary
Disclosed is a deamidation rate measurement kit, which includes a stock solution of the compound Boc-Asn-Gly-OEt in deionized/distilled water, and a stock solution of the compound Boc-Asp-Gly-OEt in deionized/distilled water.