Molecular cloning and functional analysis of porcine SULT1A1 gene and its variant: a single mutation SULT1A1 causes a...

Area of Science:

• Animal Genetics
• Biochemistry
• Food Science

Background:

• Boar taint, primarily caused by skatole, significantly impacts the pork industry's economic viability and consumer acceptance.
• Phenol sulfotransferase (PST) plays a crucial role in the phase II metabolism and clearance of skatole metabolites in the liver.

Purpose of the Study:

• To isolate and characterize the SULT1A1 gene in pigs.
• To investigate SULT1A1 gene expression and identify polymorphisms.
• To determine the relationship between SULT1A1 genetic variation and interindividual differences in skatole levels.

Main Methods:

• Isolation and characterization of the SULT1A1 gene from pig liver.
• Analysis of SULT1A1 gene expression patterns.
• Identification of genetic polymorphisms within the SULT1A1 gene.
• Assay of sulfotransferase activity associated with identified variants.

Main Results:

• The SULT1A1 gene was successfully isolated and characterized from pig liver.
• A specific A-->G substitution at base 546 of the SULT1A1 gene was identified.
• This A-->G substitution significantly decreased the sulfation activity of the SULT1A1 enzyme.
• The reduced enzymatic activity is linked to higher skatole levels in pigs.

Conclusions:

• The identified SULT1A1 gene variant is a key factor contributing to elevated skatole levels and boar taint in pigs.
• Understanding SULT1A1 variations enables prediction of sulfation status in pigs.
• This research provides a foundation for developing genetic markers to select pigs with lower skatole concentrations, enhancing pork quality.