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Structure, chromosomal localization, and expression pattern of the murine Magp gene
The Journal of Biological Chemistry
|December 25, 1993
Summary
Researchers characterized the mouse microfibril-associated glycoprotein (MAGP) gene, detailing its structure, chromosomal location on chromosome 4, and widespread expression in connective tissues during development.
Area of Science:
- Molecular Biology
- Genetics
- Developmental Biology
Background:
- Microfibril-associated glycoprotein (MAGP) is a component of 10-nm microfibrils.
- Understanding MAGP's genetic basis and expression is crucial for comprehending microfibril function.
Purpose of the Study:
- To characterize the mouse MAGP gene's primary structure, genomic organization, and chromosomal localization.
- To investigate the developmental expression patterns of the MAGP gene in mice.
Main Methods:
- cDNA cloning, Northern blot analysis, S1 nuclease mapping, and primer extension mapping were used to analyze the transcript.
- Genomic Southern analysis and isolation of a genomic clone determined gene structure.
- Somatic cell hybrid analysis and fluorescence in situ hybridization mapped the gene's chromosomal location.
Main Results:
- The mouse MAGP transcript is 1,037 base pairs long and the gene comprises 9 exons.
- The MAGP gene was localized to mouse chromosome 4, region D3-E1.
- The MAGP gene promoter lacks canonical TATA/CCAAT boxes, suggesting broad expression, which was confirmed by widespread transcript detection in mesenchymal/connective tissues throughout development.
Conclusions:
- This study provides a comprehensive characterization of the mouse MAGP gene, including its structure, localization, and developmental expression.
- The findings indicate that MAGP is broadly expressed in connective tissues, highlighting its fundamental role in mammalian development.
