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The sequence of a cDNA encoding functional murine C1-inhibitor protein
J A Russell1, K Whaley, S Heaphy
1Department of Microbiology and Immunology, University of Leicester, Medical School, UK.
Biochimica Et Biophysica Acta
|May 30, 1997
Summary
Murine C1-inhibitor protein, a key component in immune regulation, is 482 amino acids long. Its structure includes a proline- and threonine-rich N-terminal domain with significant homology to human and bovine counterparts.
Area of Science:
- Biochemistry
- Immunology
- Proteomics
Background:
- C1-inhibitor protein (C1-INH) plays a crucial role in regulating the complement system and other inflammatory pathways.
- Understanding the structural and functional characteristics of C1-INH across species is vital for immunological research.
Purpose of the Study:
- To characterize the primary structure of the murine C1-inhibitor protein.
- To identify key domains and compare their homology with homologous proteins in other species.
Main Methods:
- Bioinformatic analysis of the murine C1-inhibitor protein sequence.
- Sequence alignment and identity comparison with human and bovine C1 inhibitor sequences.
Main Results:
- The murine C1-inhibitor protein is composed of 482 amino acids.
- It features an N-terminal domain (118 amino acids) abundant in proline and threonine, and a serpin domain.
- The N-terminal domain exhibits 39% amino acid identity to the corresponding regions in human and bovine C1 inhibitor.
Conclusions:
- The murine C1-inhibitor protein shares structural similarities with its human and bovine orthologs, particularly in the N-terminal domain.
- These findings provide a basis for further functional studies of murine C1-INH in immune regulation.