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Structure and expression of the C3 gene.
Springer Seminars in Immunopathology
|January 1, 1983
Summary
Researchers mapped interactive sites on the C3 polypeptide using molecular biology techniques. This review details mouse and human C3 gene properties, aiding studies on C3 deficiency and gene expression.
Area of Science:
- Molecular Biology
- Genetics
- Biochemistry
Background:
- The C3 polypeptide has multiple interactive sites requiring detailed mapping.
- Understanding C3 gene structure and expression is crucial for studying deficiencies and tissue-specific gene regulation.
Purpose of the Study:
- To review and present data on the molecular properties of mouse and human C3 mRNA, cDNA, and genomic DNA.
- To map the human C3 gene and explore its linkage with myotonic dystrophy.
- To investigate the molecular basis of C3 deficiency and tissue-specific C3 gene expression.
Main Methods:
- Protein chemistry, nucleic acid technology, and molecular biology approaches.
- Southern blot analysis for gene mapping and cross-hybridization studies.
- Preparation and characterization of human C3 genomic DNA clones.
Main Results:
- The amino acid sequence of the N-terminus of mouse C3 beta was determined.
- The mouse genome contains a single C3 gene, with strong cross-hybridization between murine and human sequences.
- The human C3 gene was mapped to chromosome 19, linked to the myotonic dystrophy locus.
Conclusions:
- Cloned C3 cDNA and genomic DNA facilitate research into C3 polypeptide topography, gene structure, and inherited C3 deficiencies.
- The C3 gene serves as a model for studying tissue-specific gene expression.
- Nucleic acid hybridization is a sensitive method for quantifying C3 mRNA.