Increased store-operated Ca 2+ entry mediated by GNB5 and STIM1

Namju Kang, Jung Yun Kang, Soonhong Park, DongMin Shin

Research output: Contribution to journalArticle

Abstract

Recent human genetic studies have shown that Gβ5 is related to various clinical symptoms, such as sinus bradycardia, cognitive disability, and attention deficit hyperactivity disorder. Although the calcium signaling cascade is closely associated with a heterotrimeric G-protein, the function of Gβ5 in calcium signaling and its relevance to clinical symptoms remain unknown. In this study, we investigated the in vitro changes of store-operated calcium entry (SOCE) with exogenous expression of Gβ5. The cells expressing Gβ5 had enhanced SOCE after depletion of calcium ion inside the endoplasmic reticulum. Gβ5 also augmented Stim1- and Orai1-dependent SOCE. An ORAI1 loss-of-function mutant did not show inhibition of Gβ5-induced SOCE, and a STIM1-ERM truncation mutant showed no enhancement of SOCE. These results suggested a novel role of GNB5 and Stim1, and provided insight into the regulatory mechanism of SOCE.

Original languageEnglish
Pages (from-to)343-348
Number of pages6
JournalKorean Journal of Physiology and Pharmacology
Volume22
Issue number3
DOIs
Publication statusPublished - 2018 May 1

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Calcium
Calcium Signaling
Heterotrimeric GTP-Binding Proteins
Medical Genetics
Attention Deficit Disorder with Hyperactivity
Bradycardia
Endoplasmic Reticulum
Ions

All Science Journal Classification (ASJC) codes

  • Physiology
  • Pharmacology

Cite this

Kang, Namju ; Kang, Jung Yun ; Park, Soonhong ; Shin, DongMin. / Increased store-operated Ca 2+ entry mediated by GNB5 and STIM1 In: Korean Journal of Physiology and Pharmacology. 2018 ; Vol. 22, No. 3. pp. 343-348.
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Increased store-operated Ca 2+ entry mediated by GNB5 and STIM1 . / Kang, Namju; Kang, Jung Yun; Park, Soonhong; Shin, DongMin.

In: Korean Journal of Physiology and Pharmacology, Vol. 22, No. 3, 01.05.2018, p. 343-348.

Research output: Contribution to journalArticle

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