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The Huntington's disease mutation is genetically dominant and almost fully penetrant; mutation of either of a person's HTT alleles causes the disease. It is not inherited according to sex, but by the length of the repeated section of the gene; hence its severity can be influenced by the sex of the affected parent.
The genetic mutation linked to Huntington's has long been known, but scientists haven't understood how people could have the mutation from birth, but not develop any problems until later in life ...
Huntington's disease, which affects about 30,000 Americans, is a fatal, inherited disorder that causes progressive movement, psychological and cognitive problems. If a parent has it, their ...
They focused on the Huntington’s mutation, which involves a stretch of DNA in a particular gene where a three-letter sequence – CAG – is repeated at least 40 times. In people without the disease this sequence is repeated just 15 to 35 times.
Huntingtin (Htt) is the protein coded for in humans by the HTT gene, also known as the IT15 ("interesting transcript 15") gene. [5] Mutated HTT is the cause of Huntington's disease (HD), and has been investigated for this role and also for its involvement in long-term memory storage.
These often are translated into polyglutamine-containing proteins that form inclusions and are toxic to neuronal cells. Examples of the disorders caused by this mechanism include Huntington's disease and Huntington disease-like 2, spinal-bulbar muscular atrophy, dentatorubral-pallidoluysian atrophy, and spinocerebellar ataxia 1–3, 6–8, and 17.
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