Matrix Attachment Regions for Higher Mammalian Gene Expression

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Solution Overview

Problem

Existing methods for maximizing protein expression in vitro, such as those involving transcription initiation, enhancer sequences, and mRNA regulation, are inadequate for optimal gene expression.

Innovation Solution

The use of newly identified matrix attachment regions (MAR) sequences, including cores and flanking regions, to enhance gene expression by attaching to the mammalian nuclear matrix, along with chimeric MAR sequences formed from these regions, to optimize transcription and mRNA production.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If conventional methods (transcription initiation, enhancer sequences, mRNA regulation) are used to maximize protein expression, then some level of protein expression is achieved, but optimal gene expression is not reached

Engineering Contradiction:

Improveprotein expression levelVSAvoidadequacy of expression method

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent introduces matrix attachment regions (MARs) as intermediary elements that mediate between the nuclear matrix and gene expression regulation. These MAR sequences act as binding sites that facilitate optimal transcription and mRNA processing, thereby achieving superior protein expression compared to conventional methods without directly modifying the core transcriptional machinery

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent identifies and utilizes specific sequence parameters (MAR core sequences with particular nucleotide arrangements) that, when introduced into gene constructs, fundamentally change the expression outcome. The MAR sequences create favorable structural and functional parameters for transcription initiation, elongation, and mRNA export, leading to optimized protein production

Inventive Principle:

Principle #35Parameter changes

2Productivity

If existing gene expression optimization methods are applied, then current protein production levels are maintained, but new and more efficient expression strategies are not discovered

Engineering Contradiction:

Improveprotein production efficiencyVSAvoiddiscovery of new expression strategies

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent segments the gene expression machinery into distinct functional modules: promoter regions, enhancer sequences, matrix attachment regions, and mRNA processing elements. By independently identifying and optimizing each segment (particularly the MAR sequences), the patent enables versatile combination strategies that can be adapted to different gene expression applications

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs computational methods to search databases for conserved MAR sequence motifs and uses these copied sequence patterns to design new expression-optimizing elements. This allows the discovery of novel MAR sequences that can be universally applied across different gene constructs to enhance expression efficiency

Inventive Principle:

Principle #26Copying

Data Source

PatentUS12565663B2Matrix attachment regions and uses in promoting gene expression

Publication Date: 2026.03.03 CELLTHEON CORP

AI summary

The present disclosure relates to new identified matrix attachment regions (MAR) and chimeric sequences. Also disclosed are nucleotide constructs containing a MAR at a suitable location relative to a protein-coding sequence for optimal expression of the protein.