Artificial Mini-Proteome Libraries Enriched for In-Frame Translation
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Solution Overview
Problem
Existing nucleic acid mini-proteome libraries for cancer vaccines are often fragmented, leading to inefficient translation due to improper reading frames, necessitating improved libraries enriched for in-frame coding regions.
Innovation Solution
Biologically-selected nucleic acid libraries are prepared by enriching for sequences containing in-frame coding regions using methods like puromycin-tagging, ribosome display, or E. coli surface display, which link translated polypeptides to RNA transcripts, allowing separation of in-frame fragments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fragmented mRNA from tumor cells is used to prepare cancer vaccines, then the vaccines can be prepared from available clinical samples, but most RNA fragments will not contain proper translation initiation signals and will not be in the proper reading frame for effective translation
Solution Approach 1:
The invention segments the fragmented RNA population into functional and non-functional portions by using translation-dependent selection methods. Only RNA fragments that are actually translated into protein are enriched and selected for vaccine inclusion, automatically separating functional coding sequences from non-functional fragments regardless of their origin from clinical samples.
Solution Approach 2:
The translation machinery itself serves as the selection mechanism. By allowing in vitro translation to occur and then selecting for translated products, the system uses its own functional output (translated protein) to identify and enrich for functional RNA fragments, eliminating the need for external verification of reading frame correctness.
2Adaptability or versatility
If total mRNA from tumor cells is used, then all potential antigens are included, but the majority of fragments lack proper reading frames and translation initiation signals
Solution Approach 1:
The invention extracts only the functional subset of RNA fragments that are actually translated from the total mRNA population. By using translation-dependent enrichment, it separates the productive coding fragments from the non-productive majority, retaining broad antigen coverage while eliminating translationally inert sequences.
Solution Approach 2:
The invention changes the selection parameter from theoretical coding potential to actual translation occurrence. By selecting for RNA fragments that successfully undergo translation rather than those that merely appear to code for protein by sequence analysis, it enriches for fragments with proper reading frames and initiation signals.
3Device complexity
If conventional mRNA library methods are used, then library preparation is simplified, but the libraries contain大量 non-functional fragments that waste resources in downstream applications
Solution Approach 1:
The invention introduces translation as an intermediary selection step between library preparation and downstream application. This intermediary process acts as a filter that enriches for functional fragments without requiring complex additional purification steps, maintaining relative simplicity while dramatically improving functional content.
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 enriches for functional, in-frame coding regions, enabling effective translation and production of personalized cancer vaccines.
Implementation Method 1
ribosome display, or E. coli surface display, which link translated polypeptides to RNA transcripts
Data Source
AI summary
Provided herein are nucleic acid artificial mini-proteome libraries, and methods of making and using such libraries.