Rainbow trout p53: cDNA cloning and biochemical characterization

Area of Science:

• Molecular biology
• Genetics
• Comparative genomics

Background:

• The p53 protein is a critical tumor suppressor involved in cell cycle regulation and DNA repair.
• Understanding p53 function across different species provides insights into its evolutionary conservation and biological roles.

Purpose of the Study:

• To clone and sequence the p53-encoding cDNA from rainbow trout (Salmo gairdneri).
• To characterize the structural features of the rainbow trout p53 protein.
• To investigate the functional interaction of rainbow trout p53 with the SV40 large T antigen.

Main Methods:

• cDNA cloning and sequencing of the rainbow trout p53 gene.
• Bioinformatic analysis to identify conserved domains and structural features.
• In vitro assays to test the interaction between rainbow trout p53 and SV40 large T antigen.

Main Results:

• The rainbow trout p53 cDNA was successfully cloned and sequenced.
• The encoded p53 protein exhibits conserved structural characteristics, including five highly conserved domains, an acidic N-terminus, a hydrophilic C-terminus, and a penultimate serine residue.
• Rainbow trout p53 specifically interacts with the SV40 large T antigen.

Conclusions:

• The p53 gene in rainbow trout is structurally conserved, suggesting a conserved role in cellular processes.
• The observed interaction with SV40 large T antigen indicates functional conservation of rainbow trout p53.
• This study contributes to the understanding of p53 evolution and function in fish.