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Evidence for alternate splicing within the mRNA transcript encoding the DNA damage response kinase ATR
J L Mannino1, W Kim, M Wernick
1Department of Biochemistry and Molecular Biology, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA.
Gene
|July 27, 2001
Summary
Researchers discovered alternate splicing in the ATR gene
Area of Science:
- Molecular Biology
- Genetics
- Cellular Biology
Background:
- Cellular responses to DNA damage involve PIK-like kinases.
- Understanding regulators of these kinases, particularly their non-catalytic domains, is crucial.
- Limited knowledge exists regarding factors controlling PIK-like protein activity.
Purpose of the Study:
- To investigate functional subdomains within the non-catalytic domain of the PIK-like protein ATR.
- To determine if the ATR gene transcript undergoes alternative splicing.
- To explore the functional significance of alternative splicing in ATR.
Main Methods:
- Sequencing of human expressed sequence tag (EST) clones for ATR cDNA.
- Reverse transcriptase-polymerase chain reaction (RT-PCR) on human RNA.
- Cloning and sequencing of human genomic DNA segments.
- Analysis of alternative ATR transcript expression in human tissues.
Main Results:
- Identified alternative splicing in the mRNA region encoding the non-catalytic domain of ATR.
- Confirmed alternative splicing arises from a single 192 bp exon in the ATR gene.
- Demonstrated differential expression of alternative ATR transcripts across various human tissues.
Conclusions:
- The non-catalytic domain of ATR is subject to alternative splicing.
- Alternative splicing of ATR transcripts suggests functional importance of this region.
- Further research is warranted to elucidate the functional implications of ATR alternative splicing.
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