GDF11 Variant C-Terminus Modification for Protein Stability
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Solution Overview
Problem
Age-related dysfunction in adult stem cells, particularly in skeletal muscle and CNS, is not well understood, leading to a need for identifying factors that can promote or reverse age-associated changes.
Innovation Solution
Development of a GDF11 variant with enhanced stability and activity, including modifications at the C-terminus, such as the addition of tryptophan and glutamic acid, to increase circulating GDF11 levels, promote angiogenesis, neurogenesis, and rejuvenate skeletal muscle stem cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If GDF11 is administered to increase circulating levels, then angiogenesis and neurogenesis are enhanced, but the protein has limited stability and short half-life
Solution Approach 1:
The patent applies parameter changes by modifying the amino acid sequence of GDF11, specifically adding amino acids at the C-terminus (such as tryptophan and glutamic acid) to alter the protein's physical and chemical properties. This modification changes the stability parameter of GDF11, extending its half-life from approximately 6-8 hours to potentially longer durations, while maintaining its biological activity in promoting angiogenesis and neurogenesis.
2Reliability
If GDF11 activity is enhanced to improve tissue regeneration, then therapeutic efficacy increases, but potential off-target effects and harmful factors may increase
Solution Approach 1:
The patent applies local quality by making targeted modifications at specific locations in the GDF11 protein structure, particularly at the C-terminus. By locally modifying only the terminal amino acids rather than the entire protein structure, the invention enhances stability and potentially efficacy while preserving the core functional domains that mediate specific receptor interactions, thereby reducing the risk of off-target effects.
3Duration of action of stationary object
If C-terminus modifications are made to extend half-life, then protein stability improves, but manufacturing precision and characterization difficulty increase
Solution Approach 1:
The patent applies segmentation by dividing the GDF11 protein into functional domains, with modifications confined to the C-terminal segment. This segmented approach allows for standardized production of the modified sequence, as the changes are localized and can be incorporated through established recombinant DNA techniques, thereby maintaining manufacturing precision while achieving extended half-life.
Data Source
AI summary
Disclosed herein are GDF11 variant polypeptides. Also disclosed herein are methods for increasing GDF11 protein levels in a subject by administering a GDF11 variant polypeptide.