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Molecular cloning, cDNA sequence analysis, and chromosomal localization of mouse Pkd2
1Department of Medicine, Albert Einstein College of Medicine, Bronx, New York 10461, USA.
Genomics
|October 27, 1997
Summary
Researchers cloned and characterized the mouse Pkd2 gene, crucial for autosomal dominant polycystic kidney disease (ADPKD). This study details its sequence, localization, and expression, aiding ADPKD research.
Area of Science:
- Genetics
- Molecular Biology
- Nephrology
Background:
- Autosomal dominant polycystic kidney disease (ADPKD) is a genetic disorder.
- The gene for the second form of ADPKD (ADPKD2) has been identified as PKD2.
- Understanding the homologous gene in model organisms is crucial for disease research.
Purpose of the Study:
- To clone and characterize the murine homologue of the human PKD2 gene, named Pkd2.
- To analyze the cDNA sequence, genomic localization, and expression pattern of Pkd2 in mice.
- To assess Pkd2 as a candidate gene for mouse models of polycystic kidney disease.
Main Methods:
- Cloning of the Pkd2 cDNA sequence.
- Bioinformatic analysis to predict protein structure and conservation.
- Genomic mapping of Pkd2 to mouse Chromosome 5.
- Messenger RNA (mRNA) expression analysis in various mouse tissues.
Main Results:
- The Pkd2 cDNA sequence is 5134 bp, encoding a 966-amino-acid integral membrane protein.
- Pkd2 shows high conservation with human polycystin-2 (91% identity, 98% similarity).
- Pkd2 mRNA is expressed in multiple mouse tissues, indicating a widespread role.
- Pkd2 was mapped to mouse Chromosome 5 and excluded as a candidate for certain polycystic kidney mutations.
Conclusions:
- The murine Pkd2 gene is highly conserved and widely expressed.
- Pkd2 represents the mouse homologue of the human PKD2 gene involved in ADPKD.
- This characterization provides a valuable tool for studying ADPKD pathogenesis in a mouse model.