| First Author | Tanaka S | Year | 2011 |
| Journal | J Physiol Sci | Volume | 61 |
| Issue | 3 | Pages | 221-9 |
| PubMed ID | 21424589 | Mgi Jnum | J:235425 |
| Mgi Id | MGI:5796262 | Doi | 10.1007/s12576-011-0140-4 |
| Citation | Tanaka S, et al. (2011) Inositol 1, 4, 5-trisphosphate receptor interacts with the SNARE domain of syntaxin 1B. J Physiol Sci 61(3):221-9 |
| abstractText | Inositol 1, 4, 5-trisphosphate receptors (IP(3)Rs) are intracellular ligand-gated Ca(2+) channels that mediate Ca(2+) release from the endoplasmic reticulum (ER) into the cytosol and function in diverse cellular processes including fertilization, muscle contraction, apoptosis, secretion, and synaptic plasticity. The Ca(2+) release activity of IP(3)Rs is tightly regulated by many factors including IP(3)R-binding proteins. We show that IP(3)Rs interact with syntaxin 1 (Syx1), a membrane trafficking protein that regulates various plasma-membrane ion channels including N-, P/Q, and L-type voltage-gated Ca(2+) channels, voltage-gated potassium channels, and an epithelial sodium channel. We found that a SNARE-domain of Syx1B, one of the two Syx1 isoforms, directly interacted with the type1 IP(3)R (IP(3)R1) internal coupling domain, a known modulator for channel opening. These results indicate that Syx1B is an IP(3)R-interacting protein and that its interaction may play a crucial role in regulating the channel activity of IP(3)Rs in Syx1B-expressing cells. |
