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Chromosomal assignment of the gene for protein tyrosine phosphatase HPTP delta
K Hasegawa1, T Ariyama, J Inazawa
1Department of Microbiology and Immunology, Tokyo Metropolitan Institute for Neuroscience.
Abstract:
Protein tyrosine phosphatase (PTP) negatively regulates the effect of protein tyrosine kinases and is implicated in the regulation of a variety of biological phenomena such as cell activation, differentiation and neoplastic transformation. To gain insight into the role of PTPs, we cloned the human receptor-type PTP gene and assigned the chromosome harboring the gene for HPTP delta by using DNAs from human-mouse hybrid cell lines and by fluorescence in situ hybridization. The results clearly demonstrated that HPTP delta gene maps to human chromosome 9p24.
Insights
Researchers identified the specific chromosome location for the human protein tyrosine phosphatase delta (HPTP delta) gene. This finding aids in understanding the role of protein tyrosine phosphatases in cellular processes and diseases.
Area of Science:
- Molecular Biology
- Genetics
- Cell Biology
Background:
- Protein tyrosine phosphatases (PTPs) are crucial regulators of cellular signaling pathways, counteracting the actions of protein tyrosine kinases.
- Dysregulation of PTPs is implicated in various biological processes, including cell activation, differentiation, and cancer development.
Purpose of the Study:
- To investigate the role of PTPs in cellular regulation.
- To identify the chromosomal location of the human receptor-type PTP delta (HPTP delta) gene.
Main Methods:
- Gene cloning of the human receptor-type PTP gene.
- Chromosomal mapping using DNA from human-mouse hybrid cell lines.
- Fluorescence in situ hybridization (FISH) for precise gene localization.
Main Results:
- The human HPTP delta gene was successfully cloned.
- The study definitively mapped the HPTP delta gene to chromosome 9p24 in humans.
Conclusions:
- The precise localization of the HPTP delta gene provides a foundation for further research into its function.
- Understanding the genetic basis of PTPs can offer insights into their involvement in diseases like cancer.