Nucleic Acid Display Library Purification via Solid-Phase Separation
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Solution Overview
Problem
Existing methods for producing nucleic acid-polypeptide conjugates are cumbersome and require multiple steps to separate unlinked components, leading to inefficiencies and increased costs.
Innovation Solution
A simple production method involving a nucleic acid display library, where nucleic acid-polypeptide conjugates are separated from unlinked components using a solid-phase carrier capable of binding to nucleic acids, followed by elution with an aqueous solution, reducing the process to three main steps and minimizing the loss of the conjugate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a multi-step process is used to separate nucleic acid-polypeptide conjugates from unlinked components (as in WO 2005/012902 A), then the separation efficiency is improved, but the process complexity and time consumption increase
Solution Approach 1:
The patent combines multiple separation steps into a single step by using a solid-phase carrier that can simultaneously bind both the nucleic acid and the polypeptide in the conjugate. This merging of separation functions eliminates the need for multiple sequential steps (immobilization on avidin beads, reverse transcription, enzyme cleavage, Histag purification), thereby reducing process complexity while maintaining separation efficiency.
Solution Approach 2:
The solid-phase carrier is designed to perform multiple functions: it binds to the nucleic acid component, maintains the conjugate structure, and enables direct separation from unlinked components. This multi-functionality replaces the need for multiple specialized reagents and steps in the prior art method.
2Reliability
If a multi-step process is used to separate nucleic acid-polypeptide conjugates from unlinked components, then the separation completeness is improved, but the time consumption increases
Solution Approach 1:
By merging the separation of nucleic acid-polypeptide conjugates from unlinked components into a single step using the solid-phase carrier, the patent achieves both complete separation and time efficiency. The multi-step process in prior art (including immobilization, reverse transcription, enzymatic cleavage, and affinity purification) is condensed into one operation without compromising separation completeness.
3Reliability
If conventional separation methods are used, then unlinked components can be removed, but the conjugate loss increases due to multiple handling steps
Solution Approach 1:
The patent reduces conjugate loss by combining all separation operations into a single step on the solid-phase carrier. This eliminates multiple transfer and handling steps that are inherent in the conventional multi-step method, thereby minimizing opportunities for conjugate loss while still achieving complete removal of unlinked components.
4Productivity
If a simple separation method is used, then the process time is reduced, but the separation efficiency may be compromised
Solution Approach 1:
The solid-phase carrier is designed with universal binding capabilities that enable it to efficiently capture nucleic acid-polypeptide conjugates in a single step. The carrier's multi-functional design ensures that simplification of the process does not compromise separation efficiency, as the carrier can simultaneously bind the nucleic acid, maintain the conjugate integrity, and enable direct separation from unlinked components.
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 method allows for efficient separation of unlinked components in a short time, maintaining the performance of the nucleic acid display library, reducing costs, and increasing design freedom while minimizing conjugate loss.
Implementation Method 1
bringing the mixture into contact with a solid-phase carrier capable of binding to the nucleic acid of the nucleic acid-polypeptide conjugate
Data Source
AI summary
A production method of a nucleic acid display library, including producing a nucleic acid-polypeptide conjugate by expressing a polypeptide from a nucleic acid and linking the nucleic acid to the polypeptide, in which a modification molecule may or may not be present in the nucleic acid-polypeptide conjugate and separating the nucleic acid-polypeptide conjugate from a mixture of a polypeptide not linked to the nucleic acid and the nucleic acid-polypeptide conjugate, independently of a nucleotide sequence of the nucleic acid and the modification molecule; and a screening method and a production method of a polypeptide, in which the nucleic acid display library is used.