Ataxia-telangiectasia mutated (ATM) is a gene that is responsible for many cellular processes, including DNA damage response, cell cycle control, and regulation of apoptosis. It was first identified in 1995 and is located on chromosome 11p15.5. Mutations in the ATM gene are responsible for the human genetic disorder ataxia-telangiectasia (A-T).
Structure of ATM Gene
The ATM gene is composed of 27 exons. The first exon encodes the protein kinase domain, which contains the catalytic domain and other regulatory domains. The other 26 exons code for other domains such as leucine-rich repeats, coiled-coil domains, and a variety of other domains. The protein encoded by the ATM gene has a molecular weight of 359 kDa.
Function of ATM Gene
The ATM gene is responsible for a variety of important cellular processes. It is involved in the regulation of the cell cycle, DNA damage response, apoptosis, and other pathways. It is a key player in DNA double-strand break repair and is essential for maintaining genomic stability. Mutations in the ATM gene are associated with a variety of diseases, such as ataxia-telangiectasia, Nijmegen breakage syndrome, and familial breast cancer.
Ataxia-Telangiectasia Mutations
Ataxia-telangiectasia mutations (ATM) are caused by mutations in the ATM gene. These mutations can affect the activity of the protein, leading to a variety of symptoms. Common symptoms of A-T include ataxia (lack of coordination), telangiectasia (red spots on the skin), and immunodeficiency (weakened immune system). Mutations in the ATM gene can also lead to an increased risk of cancer, particularly in the breast and ovaries.