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A third human CBL gene is on chromosome 19
V Ollendorff1, M Mattei, E Fournier
1U.119 Inserm, 27 Bd. Lei Roure, 13009 Marseille, France.
International Journal of Oncology
|November 24, 1998
Summary
Researchers identified a new CBL gene, CBLc, involved in cellular signal regulation and potentially acting as a tumor suppressor. This gene was localized to chromosome 19, showing genomic similarities to related CBL genes.
Area of Science:
- Molecular Biology
- Genetics
- Oncology
Background:
- CBL genes encode cytoplasmic proteins crucial for signal transduction pathways.
- These proteins act as negative regulators of signaling, suggesting a role as tumor suppressors.
- Two CBL genes, CBLa and CBLb, have been previously characterized.
Purpose of the Study:
- To identify and characterize a novel CBL gene, designated CBLc.
- To determine the genomic location of the CBLc gene.
- To investigate potential genomic paralogy involving CBLc, CBLa, and CBLb.
Main Methods:
- Isolation of a cosmid containing CBLc using an expressed sequence tag probe.
- Fluorescence in situ hybridization (FISH) on human metaphase chromosomes to map CBLc.
- Comparative genomic analysis to identify paralogous regions.
Main Results:
- A new CBL gene, CBLc, was isolated and identified.
- The CBLc gene was localized to chromosome 19, specifically band 19q13.2.
- The 19q13.2 region containing CBLc exhibits paralogy with regions 3q22-q27 (CBLb) and 11q22-q24 (CBLa).
Conclusions:
- CBLc represents a newly identified member of the CBL gene family.
- The chromosomal localization of CBLc and its paralogous relationships provide insights into genome evolution.
- Further research into CBLc's function may elucidate its role in signal transduction and cancer.