N-domain ACE Protein Crystallization via Glycosylation Removal
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Solution Overview
Problem
Current methods lack a high-quality crystal structure of the N-domain of ACE protein, hindering the determination of its structure and the development of domain-specific modulators for pharmaceutical use.
Innovation Solution
A minimally glycosylated crystal of the N-domain of ACE protein is achieved through specific purification and crystallization processes, allowing for the determination of its three-dimensional structure and enabling the screening of domain-specific modulators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional purification and crystallization methods are used for ACE protein, then the protein can be crystallized, but the glycosylation modifies the crystal structure and prevents accurate determination of the N-domain structure
Solution Approach 1:
The patent extracts and removes the glycosylation modifications from the ACE protein through specific purification steps, isolating the N-domain without carbohydrate attachments. This extraction of the harmful glycosylation factor enables accurate crystal structure determination of the N-domain, which was previously obscured by glycan interference in traditional ACE crystal structures.
Solution Approach 2:
The patent segments the ACE protein into its N-domain and C-domain components, focusing specifically on the N-domain for crystallization. By separating the protein into discrete functional domains and selecting the N-domain for study, the patent achieves a simplified structure that can be crystallized without the complicating glycosylation effects that affect the full ACE protein.
2Ease of manufacture
If the full ACE protein is crystallized, then crystals can be obtained, but the complex structure including glycosylation prevents domain-specific modulator development
Solution Approach 1:
The patent divides the complex ACE protein into its constituent N-domain and C-domain segments, and selects the N-domain for crystallization. This segmentation reduces the overall structural complexity while maintaining crystallizability, as the N-domain is smaller and less complex than the full ACE protein, enabling easier crystal production and subsequent domain-specific modulator development.
Solution Approach 2:
The patent extracts the N-domain from the full ACE protein and crystallizes it as a separate entity. By taking out the N-domain and removing glycosylation, the patent simplifies the structure for crystallographic analysis, making it possible to obtain crystals that can be used for designing domain-specific modulators without the complexity of the full protein structure.
3Stability of the object's composition
If glycosylated ACE protein is used for crystallography, then the protein maintains its native structure, but the glycan structures obscure the protein's three-dimensional configuration
Solution Approach 1:
The patent extracts and removes glycosylation from the ACE protein while maintaining the protein's core structural integrity. This extraction of carbohydrate modifications allows the protein's three-dimensional configuration to be visualized without obstruction, as the glycan structures that previously obscured the protein structure are removed, enabling accurate determination of the N-domain's 3D configuration.
Solution Approach 2:
The patent applies partial deglycosylation, removing glycan structures only from the N-domain while preserving the protein's essential structural features. This partial action is sufficient to clear the obscuring glycan structures from the crystal lattice, allowing the protein's three-dimensional configuration to be determined, while maintaining enough structural integrity for the protein to remain functional and recognizable.
Data Source
AI summary
The present invention relates to a crystal. In particular the present invention relates to a crystal of the N-domain of ACE protein. The present invention also relates to methods, processes, domain specific modulators, pharmaceutical compositions and uses of the N-domain crystal and the structure co-ordinates thereof.