Huntingtin and huntingtin-associated protein 1 influence neuronal calcium signaling mediated by inositol-(1,4,5) triphosphate receptor type 1

Tie Shan Tang, Huiping Tu, Edmond Y W Chan, Anton Maximov, Zhengnan Wang, Cheryl L. Wellington, Michael R. Hayden, Ilya Bezprozvanny

Research output: Contribution to journalArticle

333 Citations (Scopus)

Abstract

Huntington's disease (HD) is caused by polyglutamine expansion (exp) in huntingtin (Htt). The type 1 inositol (1,4,5)-triphosphate receptor (InsP3R1) is an intracellular calcium (Ca2+) release channel that plays an important role in neuronal function. In a yeast two-hybrid screen with the InsP3R1 carboxy terminus, we isolated Htt-associated protein-1A (HAP1A). We show that an InsP3R1-HAP1A-Htt ternary complex is formed in vitro and in vivo. In planar lipid bilayer reconstitution experiments, InsP3R1 activation by InsP3 is sensitized by Httexp, but not by normal Htt. Transfection of full-length Httexp or caspase-resistant Httexp, but not normal Htt, into medium spiny striatal neurons faciliates Ca2+ release in response to threshold concentrations of the selective mGluR1/5 agonist 3,5-DHPG. Our findings identify a novel molecular link between Htt and InsP3R1-mediated neuronal Ca2+ signaling and provide an explanation for the derangement of cytosolic Ca2+ signaling in HD patients and mouse models.

Original languageEnglish (US)
Pages (from-to)227-239
Number of pages13
JournalNeuron
Volume39
Issue number2
DOIs
StatePublished - Jul 17 2003

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Inositol 1,4,5-Trisphosphate Receptors
Calcium Signaling
Huntington Disease
Corpus Striatum
Lipid Bilayers
Caspases
Transfection
Yeasts
Calcium
Neurons
Huntingtin Protein
metabotropic glutamate receptor type 1
3,5-dihydroxyphenylglycine
In Vitro Techniques
polyglutamine

ASJC Scopus subject areas

  • Neuroscience(all)

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Huntingtin and huntingtin-associated protein 1 influence neuronal calcium signaling mediated by inositol-(1,4,5) triphosphate receptor type 1. / Tang, Tie Shan; Tu, Huiping; Chan, Edmond Y W; Maximov, Anton; Wang, Zhengnan; Wellington, Cheryl L.; Hayden, Michael R.; Bezprozvanny, Ilya.

In: Neuron, Vol. 39, No. 2, 17.07.2003, p. 227-239.

Research output: Contribution to journalArticle

Tang, Tie Shan ; Tu, Huiping ; Chan, Edmond Y W ; Maximov, Anton ; Wang, Zhengnan ; Wellington, Cheryl L. ; Hayden, Michael R. ; Bezprozvanny, Ilya. / Huntingtin and huntingtin-associated protein 1 influence neuronal calcium signaling mediated by inositol-(1,4,5) triphosphate receptor type 1. In: Neuron. 2003 ; Vol. 39, No. 2. pp. 227-239.
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