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Cloning, chromosomal mapping and expression pattern of the mouse Brca2 gene
1CRC Centre for Cell and Molecular Biology, Chester Beatty Laboratories, Institute of Cancer Research, London, UK.
Human Molecular Genetics
|February 1, 1997
Summary
Researchers characterized the mouse Brca2 gene, finding it shares expression patterns with Brca1. This study highlights similarities between these key genes involved in inherited breast cancer susceptibility.
Area of Science:
- Genetics
- Molecular Biology
- Cancer Research
Background:
- Inherited predisposition accounts for a significant portion of human breast cancers.
- Mutations in the BRCA2 gene are a major cause of hereditary breast cancer.
- The human BRCA2 gene encodes a large protein with limited homology to known proteins.
Purpose of the Study:
- To describe the mouse Brca2 gene and its characteristics.
- To compare the mouse Brca2 gene with its human counterpart.
- To investigate the expression patterns of Brca2 in mouse tissues.
Main Methods:
- Gene mapping of the mouse Brca2 gene.
- Sequencing of mouse Brca2 cDNA.
- Analysis of Brca2 gene expression in various mouse tissues.
Main Results:
- The mouse Brca2 gene maps to chromosome 5, analogous to human chromosome 13q12.
- The mouse Brca2 protein (3329 amino acids) shows poor conservation between species, similar to Brca1.
- Brca2 is transcribed across a wide array of mouse tissues with expression patterns mirroring Brca1.
Conclusions:
- The mouse Brca2 gene is a valuable model for studying hereditary breast cancer.
- Comparative analysis reveals conserved and divergent features of Brca2 between mice and humans.
- The similar expression patterns of Brca1 and Brca2 suggest coordinated roles in inherited cancer susceptibility.