Diseases, Conditions, Syndromes

Huntington's Disease: Neural traffic could help understand the disease

Huntington's disease is a genetic neurodegenerative disorder caused by mutations in the protein huntingtin and characterized by involuntary dance-like movements, severe behavioral changes and cognitive impairment. That neuronal ...


Predicting the onset and course of Huntington's disease

An MDC research team reports in the journal Molecular Cell that short protein fibers precede the formation of larger deposits that accumulate in the brains of those affected by the incurable Huntington's disease, sometimes ...


Scientists move closer to treatment for Huntington's disease

A new variant of the gene-editing CRISPR/Cas9 system is safer and more specific than versions previously used in early research towards a treatment for Huntington's disease, shows research published today in Frontiers in ...


Potential therapeutic target for Huntington's disease

There is new hope in the fight against Huntington's disease. Scientists at the Gladstone Institutes discovered that changing a specific part of the huntingtin protein prevented the loss of critical brain cells and protected ...

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More reference expression data

The Huntingtin gene, also called HTT or HD (Huntington disease) gene, or the IT15 ("interesting transcript 15") gene codes for a 348 kDa protein called the huntingtin protein.

It is variable in its structure as there are many polymorphisms of the gene which can lead to variable numbers of glutamine residues present in the protein. In its wild-type (normal) form, it contains 6-35 glutamine residues, however, in individuals affected by Huntington's Disease (an autosomal dominant genetic disorder), it contains greater than 36 glutamine residues (highest reported repeat length is about 250). It's commonly used name is derived from this disease, previously the IT15 label was commonly used. Huntingtin has a predicted mass about 350 kDa, however, this varies and is largely dependent on the number of glutamine residues in the protein. Normal huntingtin is generally accepted to be 3144 amino acids in size.

The exact function of this protein is not known, but it plays an important role in nerve cells. Within cells, huntingtin may be involved in signaling, transporting materials, binding proteins and other structures, and protecting against programmed cell death (apoptosis). The huntingtin protein is required for normal development before birth. It is expressed in many tissues in the body, with the highest levels of expression seen in the brain.

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