Arachnomelia Syndrome in Simmental Cattle Linked to Genetic Mutation

Scientists have identified the genetic cause of a rare and debilitating condition known as arachnomelia syndrome in Simmental cattle. The disease, which leads to malformations of the skeleton and typically results in the death of affected calves at birth, is caused by a homozygous 2-bp deletion in the molybdenum cofactor synthesis step 1 gene (MOCS1). A study published in the journal Bmc Genetics found that over 120 cases of the condition were detected in the year 2006, prompting the researchers to fine-map and identify the gene responsible.

Key Takeaways:

Arachnomelia syndrome is an autosomal recessive inherited disease in cattle that affects the skeletal system, leading to malformations of the legs, spinal column, and skull.
The condition is typically fatal for affected calves, with the majority dying at birth.
A surveillance system detected over 120 cases of the condition in Simmental cattle in the year 2006.
Researchers identified the MOCS1 gene as the causative mutation responsible for arachnomelia syndrome in Simmental cattle.
The MOCS1 gene is involved in the synthesis of molybdenum cofactors, which are essential for the proper functioning of several enzymes in the body.
J. Buitkamp and colleagues from the Institute for Animal Breeding were involved in the research and identified the gene causing the condition.
The study was published in Bmc Genetics in 2011.

Statistics:

120: Number of cases of arachnomelia syndrome detected in Simmental cattle in the year 2006.
9 cM: The region on bovine chromosome 23 where the causative mutation was previously mapped.
2-bp deletion: The specific genetic mutation identified in the MOCS1 gene leading to arachnomelia syndrome.

Sources:

Bmc Genetics, "Arachnomelia syndrome in Simmental cattle is caused by a homozygous 2-bp deletion in the molybdenum cofactor synthesis step 1 gene (MOCS1)."
J. Buitkamp et al., Institute for Animal Breeding.