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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.
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. [6]
The following is a list of genetic disorders and if known, type of mutation and for the chromosome involved. Although the parlance "disease-causing gene" is common, it is the occurrence of an abnormality in the parents that causes the impairment to develop within the child. There are over 6,000 known genetic disorders in humans.
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 ...
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. New research shows that the mutation is, surprisingly, harmless for decades.
SMBA is the first "CAG / polygutamine" disease, which is a subcategory of repeat disorders. [9] In 1992, for myotonic dystrophy type 1 (DM1), CTG expansion was found in the myotonic dystrophy protein kinase (DMPK) 3' UTR. In 1993, for Huntington's disease (HD), a longer-than-usual CAG repeat with was found in the exon 1 coding sequence. [10]
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