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Characterization of mouse carboxypeptidase N small active subunit gene structure
1University of Texas-Houston Institute of Molecular Medicine for the Prevention of Human Diseases, and Department of Biochemistry and Molecular Biology, University of Texas-Houston Medical School, Houston, TX 77030, USA.
Journal of Immunology (Baltimore, Md. : 1950)
|May 9, 2001
Summary
Researchers characterized the murine Carboxypeptidase N (CPN) small subunit gene, revealing its structure, regulation, and chromosomal location. This study details the gene
Area of Science:
- Biochemistry
- Molecular Biology
- Genetics
Background:
- Carboxypeptidase N (CPN) is a plasma metalloprotease crucial for cleaving carboxyl-terminal amino acids from peptides.
- CPN plays a role in regulating biologically active peptides like kinins and fibrinopeptides.
Purpose of the Study:
- To delineate the coding region, gene structure, and chromosome location of the murine CPN small subunit.
- To understand the regulatory elements governing CPN small subunit gene expression.
Main Methods:
- Isolation and characterization of cDNA and genomic clones.
- Northern and fluorescence in situ hybridization analyses.
- Primer extension and sequence analysis of the 5'-flanking region.
Main Results:
- The murine CPN small subunit gene is a single copy, approximately 29 kb, transcribed into a 1793-bp mRNA in the liver.
- The gene comprises nine exons and eight introns with standard intron/exon junctions.
- The gene is located on mouse chromosomal band 19D2, syntenic to human 10q23-25, with a TATA-less promoter suggesting liver-specific expression.
Conclusions:
- The study provides a comprehensive characterization of the murine CPN small subunit gene.
- Identified regulatory elements suggest tissue-specific expression, likely in the liver.
- The chromosomal localization provides insights into conserved gene organization between mouse and human.