Rubella Virus Spike Construct Soluble E1-E2 Fusion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing rubella antigens are limited by low reactivity, low yield, and high impurity levels, making them unsuitable for reliable diagnostic detection and vaccine applications, especially in the acute phase of infections and for pregnant women or immunodeficient individuals.
Innovation Solution
A rubella virus E1-E2 envelope protein complex construct, known as the rubella spike construct, is developed, comprising E1 and E2 components with removed transmembrane regions and intravirional domains, connected via a linker, which is expressed in eukaryotic cells and secreted in soluble form, mimicking native heterodimers for improved antigenicity and diagnostic utility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current methods for producing rubella antigens are used, then production is simpler, but reactivity and diagnostic reliability are low
Solution Approach 1:
The envelope proteins E1 and E2 are divided into functional domains: the immunogenic ectodomains are retained while the transmembrane regions and intravirional domains are removed. This segmentation allows the proteins to be produced as soluble recombinant fragments that maintain antigenicity without requiring complex viral assembly processes, thereby improving diagnostic reliability while managing production complexity
Solution Approach 2:
A linker sequence is introduced as an intermediary element to connect the E1 and E2 ectodomains. This linker serves as a mediator that enables the formation of a stable E1-E2 complex structure, facilitating proper folding and antigen presentation while simplifying production compared to native viral assembly
2Productivity
If current antigen production methods are used, then production cost is lower, but yield and purity are low
Solution Approach 1:
The transmembrane regions and intravirional domains are extracted from the envelope proteins E1 and E2, leaving only the soluble ectodomains. This extraction enables the proteins to be produced as soluble recombinant antigens in eukaryotic expression systems, significantly improving yield and purity while maintaining manufacturing feasibility through standard biotechnological processes
Solution Approach 2:
The physical-chemical parameters of the antigen structure are changed by removing hydrophobic transmembrane regions and replacing them with soluble linker sequences. This parameter change transforms the proteins into soluble forms that can be produced with high yield and purity in recombinant expression systems, improving productivity while managing manufacturing complexity
3Reliability
If current antigen production methods are used, then production is simpler, but impurity levels are high
Solution Approach 1:
By segmenting the envelope proteins into ectodomains connected by linkers, the invention produces homogeneous recombinant antigens with defined structures. This segmentation eliminates contamination from viral components and cellular debris associated with whole-virus methods, reducing impurity levels while improving diagnostic reliability
Solution Approach 2:
The invention creates recombinant copies of the immunogenic ectodomains of E1 and E2 that mimic the native protein structures. These recombinant copies can be produced in high purity through recombinant expression systems, eliminating impurities associated with traditional antigen production while maintaining diagnostic reliability
Data Source
AI summary
The Rubella Virus Spike construct comprises at least one E1 component and one E2 component, which are linked together. The E1 component consists of the El envelope protein, whose C-terminal transmembrane region and intravirional domain are removed and whose N-terminus comprises the ectodomain of the El envelope protein. The E2 component consists of the E2 envelope protein whose transmembrane regions and intravirional domain removed and whose C-terminus comprising the ectodomain of the E2 envelope protein.The C-terminus of the E2 component is connected to the N-terminus of the E1 component by direct fusion or by means of a linker to form an E1-E2 fusion protein.