| First Author | Wang Y | Year | 2020 |
| Journal | J Biol Chem | Volume | 295 |
| Issue | 50 | Pages | 17337-17348 |
| PubMed ID | 33060203 | Mgi Jnum | J:299410 |
| Mgi Id | MGI:6488244 | Doi | 10.1074/jbc.RA120.015605 |
| Citation | Wang Y, et al. (2020) Site-specific contacts enable distinct modes of TRPV1 regulation by the potassium channel Kvbeta1 subunit. J Biol Chem 295(50):17337-17348 |
| abstractText | Transient receptor potential vanilloid 1 (TRPV1) channel is a multimodal receptor that is responsible for nociceptive, thermal, and mechanical sensations. However, which biomolecular partners specifically interact with TRPV1 remains to be elucidated. Here, we used cDNA library screening of genes from mouse dorsal root ganglia combined with patch-clamp electrophysiology to identify the voltage-gated potassium channel auxiliary subunit Kvbeta1 physically interacting with TRPV1 channel and regulating its function. The interaction was validated in situ using endogenous dorsal root ganglia neurons, as well as a recombinant expression model in HEK 293T cells. The presence of Kvbeta1 enhanced the expression stability of TRPV1 channels on the plasma membrane and the nociceptive current density. Surprisingly, Kvbeta1 interaction also shifted the temperature threshold for TRPV1 thermal activation. Using site-specific mapping, we further revealed that Kvbeta1 interacted with the membrane-distal domain and membrane-proximal domain of TRPV1 to regulate its membrane expression and temperature-activation threshold, respectively. Our data therefore suggest that Kvbeta1 is a key element in the TRPV1 signaling complex and exerts dual regulatory effects in a site-specific manner. |
