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The Drosophila Ret gene is transcribed in multiple alternatively spliced forms
D S Huen1, M Elsdon, B A Ponder
1Department of Genetics, University of Cambridge, UK. smh1008@cus.cam.ac.uk
Molecular & General Genetics : MGG
|November 21, 2000
Summary
Researchers cloned and sequenced the Drosophila Ret gene, identifying conserved cadherin motifs and alternative splicing at the 5' end. Unlike human c-ret, Drosophila Ret showed no 3' end variation, impacting signaling specificity.
Area of Science:
- Genetics
- Molecular Biology
- Developmental Biology
Background:
- The c-ret gene is crucial for vertebrate nervous system development.
- Understanding homologs in other species aids in evolutionary and functional studies.
Purpose of the Study:
- To clone and sequence the Drosophila homolog of the vertebrate c-ret gene, named Ret.
- To analyze the structural and potential functional characteristics of Drosophila Ret.
Main Methods:
- Cloning and sequencing of the 5' and 3' ends of the Drosophila Ret gene.
- Bioinformatic analysis to predict protein sequence and identify conserved motifs.
Main Results:
- The Drosophila Ret gene was successfully cloned and sequenced.
- The extracellular domain of Ret shows significant divergence from vertebrate counterparts, but retains a cadherin motif.
- Multiple splice variants were found at the 5'-end of Ret, including one causing a premature stop codon.
- Unlike human c-ret, Drosophila Ret cDNAs exhibited no variation at their 3'-ends.
Conclusions:
- Drosophila Ret shares a conserved functional motif (cadherin) with vertebrate c-ret despite sequence divergence.
- Alternative splicing at the 5'-end of Drosophila Ret may regulate gene expression or protein function.
- The lack of 3'-end splicing variation in Drosophila Ret suggests a different mechanism for regulating signaling specificity compared to humans.