Recombinant Gram-Positive Bacteria for Lectin Production

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Solution Overview

Problem

There is a need for improved host organisms and methods for the cost-effective industrial scale production, recovery, and purification of lectin proteins, which are essential for various anti-microbial uses.

Innovation Solution

The development of novel recombinant Gram-positive bacterial cells expressing heterologous lectin proteins, along with methods for producing, recovering, and purifying these lectins using expression cassettes and fermentation processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If recombinant production of lectins is performed in E. coli or tobacco plants using existing methods, then lectin proteins can be produced, but production costs are high and the process is complex

Engineering Contradiction:

Improveproduction costVSAvoidlectin production efficiency

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The patent changes the host organism parameter from E. coli or tobacco plants to Gram-positive bacteria (Bacillus subtilis, Streptococcus pneumoniae), which fundamentally alters the production system's cost structure and simplifies downstream processing, resolving the contradiction between production cost and efficiency

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses expression cassettes containing lectin coding sequences that can be replicated and expressed in Gram-positive bacteria, creating a simplified copy of the production system that maintains lectin functionality while reducing complexity and cost

Inventive Principle:

Principle #26Copying

2Quantity of substance

If native lectins are isolated from natural sources or produced in sterile conditions, then lectin proteins can be obtained, but production costs increase significantly

Engineering Contradiction:

Improvelectin yieldVSAvoidproduction cost

Core Design Contradiction:

Quantity of substanceVSEase of manufacture

Solution Approach 1:

The patent employs Gram-positive bacteria as temporary, easily disposable production hosts that can be grown in non-sterile conditions, eliminating the need for expensive sterile manufacturing infrastructure while maintaining high lectin yield

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

3Manufacturing precision

If complex purification methods are used to obtain high purity lectin preparations, then product quality is improved, but process complexity increases

Engineering Contradiction:

Improvelectin purityVSAvoidpurification process complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent extracts only the essential purification step by exploiting the natural periplasmic localization of lectins in Gram-positive bacteria, where lectins are automatically separated from cytoplasmic contaminants, achieving high purity with minimal processing steps

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20250197910A1Compositions and methods for industrial scale production and recovery of lectins

Publication Date: 2025.06.19 DANISCO US INC

AI summary

Certain aspects of the instant disclosure are related to the industrial scale production and recovery of lectin proteins. Certain aspects are related to recombinant Gram-positive bacterial cells producing heterologous lectin proteins. Certain other aspects are related to compositions and methods for recovering and/or purifying one or more lectins and enhanced purity lectin preparations thereof.