Nucleotide sequence of canine Smad3

Area of Science:

• Molecular Biology
• Canine Genetics

Background:

• Smad3 protein is crucial for cellular signaling pathways.
• Phosphorylation of Smad3's C-terminus is vital for its function.
• A previous study indicated a unique Smad3 C-terminus in Boxer dogs (SSVF-COOH).

Purpose of the Study:

• To determine the nucleotide sequence of the canine Smad3 coding region.
• To investigate the Smad3 C-terminal amino acid sequences across various dog breeds.
• To clarify the Smad3 C-terminus variation in dogs.

Main Methods:

• DNA sequencing of the canine Smad3 gene.
• Deduction of amino acid sequences from nucleotide sequences.
• Comparative sequence analysis across different dog breeds.

Main Results:

• The Smad3 C-terminal amino acid sequence in most dog breeds is SSVS-COOH.
• The Boxer breed exhibited a different nucleotide at position 1204, resulting in a SSVF-COOH sequence.
• A single nucleotide polymorphism (SNP) was identified at nucleotide position 240.

Conclusions:

• The Smad3 C-terminal amino acid sequence is not unique in dogs.
• The SSVS-COOH sequence is conserved in most examined canine breeds.
• The Boxer breed presents a distinct Smad3 C-terminus, warranting further investigation.