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GBAS, a novel gene encoding a protein with tyrosine phosphorylation sites and a transmembrane domain, is co-amplified
1Department of Pathology and Laboratory Medicine, Mayo Clinic and Foundation, Rochester, Minnesota 55905, USA.
Abstract:
Amplification of the epidermal growth factor receptor gene (EGFR) has been noted in several forms of human cancer. Although various aspects of this gene alteration have been extensively studied, little is known about the genetic content of the chromosome 7p12 region that can be co-amplified with this cellular oncogene. Here we report the identification of and coding sequence for a novel gene, GBAS, that is localized to this region and was found to be amplified in 2 of 12 tumors as well as in 2 of 3 cell lines with EGFR amplification. The GBAS transcript is 2.2 kb in length and contains an 858-bp open reading frame. The associated amino acid sequence has identifiable signal peptide and transmembrane motifs, as well as two tyrosine phosphorylation sites that suggest that the encoded protein may be a substrate for tyrosine kinases.
Insights
Researchers identified a new gene, GBAS, co-amplified with the epidermal growth factor receptor gene (EGFR) in human cancers. This novel gene
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Amplification of the epidermal growth factor receptor gene (EGFR) is common in human cancers.
- The genetic landscape of the chromosome 7p12 region, often co-amplified with EGFR, remains largely unexplored.
Purpose of the Study:
- To identify novel genes within the chromosome 7p12 region that are co-amplified with EGFR.
- To characterize the coding sequence and potential function of newly identified genes.
Main Methods:
- Comparative genomic hybridization or similar techniques to identify amplified regions.
- Gene sequencing to determine the coding sequence of identified genes.
- Bioinformatic analysis to predict protein motifs and functions.
Main Results:
- Identification of a novel gene, GBAS, located in the 7p12 region.
- GBAS was found to be amplified in 2 out of 12 tumors and 2 out of 3 cell lines exhibiting EGFR amplification.
- The GBAS transcript is 2.2 kb with an 858-bp open reading frame, encoding a protein with signal peptide, transmembrane motifs, and tyrosine phosphorylation sites.
Conclusions:
- GBAS is a novel gene co-amplified with EGFR in certain human cancers.
- The predicted protein structure suggests GBAS may be involved in cellular signaling pathways and potentially act as a substrate for tyrosine kinases.
- Further research is warranted to elucidate the precise role of GBAS in cancer development and progression.