Related Experiment Video
Updated: Aug 16, 2026
Dissection of Hippocampal Dentate Gyrus from Adult Mouse
Published on: November 17, 2009
The murine ortholog of matrix metalloproteinase 19: its cloning, gene organization, and expression
M S Mueller1, M Harnasch, C Kolb
1University of Konstanz, Department of Immunology, Postfach M662, Konstanz, Germany.
Abstract:
We have isolated a murine cDNA orthologous to the human matrix metalloproteinase 19 (hMMP-19). The murine MMP-19 cDNA was amplified by RT-PCR using specific primers whose DNA sequences were derived from both murine MMP-19 genomic DNA and partial cDNA sequences. The murine MMP-19 (mMMP-19) is 79% identical to the human ortholog and encodes a protein of 527 amino acids with a deduced molecular mass of 59.1kDa. Analyzing the exon/intron junctions we revealed that the murine MMP-19 gene consists of nine exons and eight introns, and thus differs from the gene organization of other matrix metalloproteinases. Furthermore, a 587bp fragment of the mMMP-19 promoter containing a TATA box and an AP-1 binding motif was cloned, and 3.3kb transcripts of the MMP-19 gene were identified in liver, kidney, spleen, and colon. Finally, immunostaining of murine heart cryosections showed that mMMP-19, like its human counterpart, is expressed in the arterial tunica media of large blood vessels. By cloning mMMP-19 and unraveling its genomic structure, we have obtained valuable information for further study of the function of this MMP in vivo.
Insights
Researchers isolated murine matrix metalloproteinase-19 (MMP-19) cDNA, revealing its distinct gene structure and expression in key organs and blood vessels, aiding further functional studies.
Area of Science:
- Molecular Biology
- Genomics
- Biochemistry
Background:
- Matrix metalloproteinases (MMPs) are crucial enzymes involved in extracellular matrix remodeling.
- Matrix metalloproteinase 19 (MMP-19) has been identified in humans, but its murine ortholog and detailed characteristics remain largely uncharacterized.
Purpose of the Study:
- To isolate and characterize the murine matrix metalloproteinase 19 (mMMP-19) cDNA.
- To elucidate the genomic structure and expression patterns of mMMP-19.
- To provide a foundation for investigating the in vivo function of mMMP-19.
Main Methods:
- Reverse transcription-polymerase chain reaction (RT-PCR) was used to amplify mMMP-19 cDNA.
- Bioinformatic analysis was performed to determine protein characteristics and gene structure (exons/introns).
- Promoter region cloning and Northern blotting (implied by transcript identification) were utilized to assess gene regulation and expression.
- Immunohistochemistry was employed to localize mMMP-19 protein expression in murine tissues.
Main Results:
- Murine MMP-19 (mMMP-19) cDNA was successfully isolated, showing 79% identity to human MMP-19.
- The mMMP-19 gene comprises nine exons and eight introns, differing from other MMPs.
- mMMP-19 transcripts were detected in liver, kidney, spleen, and colon.
- Immunostaining confirmed mMMP-19 expression in the arterial tunica media of large blood vessels.
Conclusions:
- The cloning and characterization of mMMP-19 provide essential genetic and expression data.
- The unique genomic structure of mMMP-19 suggests specialized regulatory mechanisms.
- Understanding mMMP-19's expression profile, particularly in vasculature, opens avenues for functional research in vivo.
