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Analysis of the MUC1 Gene and its Polymorphism in Capra hircus

¹ Dipartimento di Produzioni Animali, Epidemiologia ed Ecologia, University of Torino, Grugliasco 10095, Italy
² Dipartimento di Sanità, Patologia, Farmacotossicologia e Benessere degli Animali, University of Bari, Valenzano 70010, Italy

Corresponding author: P. Sacchi; e-mail: paola.sacchi{at}unito.it.

The objective of our study was to demonstrate the existence of a repetitive region in the goat MUC1 gene and to develop a polymerase chain reaction (PCR) protocol to analyze its polymorphism in different breeds. Using 2 primers derived from the bovine MUC1 sequence, a PCR fragment was obtained and cloned. The sequence analysis shows that the repetitive region of goat MUC1 is an array of 60 bp repeats in accordance with the data reported for other species. The polypeptide sequences encoded by the consensus repeats of goat and bovine were exactly alike. A PCR protocol to improve the detection of goat MUC1 polymorphism was developed, and a total of 178 animals from 6 Italian breeds were analyzed. Fifteen different alleles, ranging in size from 1500 to 3000 bp, were found. The high number of alleles observed shows that the goat MUC1 is a hypervariable gene. These results are the basis for further investigations on the possible role of MUC1 polymorphism in the genetic control of disease susceptibility and production traits in the goat species.

Key Words: goat • milk • MUC1 • polymorphism

Abbreviation key: AGE = agarose gel electrophoresis, VNTR = variable number tandem repeats

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