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The murine biglycan: complete cDNA cloning, genomic organization, promoter function, and expression
Y Wegrowski1, J Pillarisetti, K G Danielson
1Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA.
Genomics
|November 1, 1995
Summary
Researchers characterized the murine biglycan (Bgn) gene, revealing its genomic structure and promoter activity. This study provides insights into biglycan gene regulation and aids in creating targeted gene-knockout mice.
Area of Science:
- Biochemistry
- Genetics
- Molecular Biology
Background:
- Biglycan is a proteoglycan with leucine-rich repeats.
- Understanding its gene structure and regulation is crucial for biological studies.
Purpose of the Study:
- To clone and sequence the complete murine biglycan (Bgn) cDNA.
- To elucidate the genomic organization and promoter activity of the Bgn gene.
- To investigate Bgn gene expression patterns in adult mice.
Main Methods:
- cDNA cloning and sequencing.
- Genomic DNA analysis and Southern blotting.
- Primer extension and transient cell transfection assays.
- Reporter gene assays (chloramphenicol acetyl transferase).
- Quantitative analysis of mRNA expression (Northern blotting).
Main Results:
- The mouse Bgn gene is larger than the human gene due to a large intron.
- The Bgn promoter is GC-rich with multiple cis-acting elements and lacks TATA/CAAT boxes.
- Multiple transcription start sites were identified.
- Functional promoter activity was confirmed, with the distal promoter being essential for full activity.
- Biglycan mRNA expression is highest in lung, liver, and spleen, and lowest in skin, heart, and kidney.
Conclusions:
- The study details the genomic organization and functional promoter of the murine biglycan gene.
- Findings are valuable for future research on biglycan gene regulation.
- This work facilitates the generation of biglycan-deficient mouse models.