# name
Ras-association domain of sorting nexin 27 is critical for regulating expression of GIRK potassium channels

# metadata.dc.description.abstract[].value
G protein-gated inwardly rectifying potassium (GIRK) channels play an important role in regulating neuronal excitability. Sorting nexin 27b (SNX27b), which reduces surface expression of GIRK channels through a PDZ domain interaction, contains a putative Ras-association (RA) domain with unknown function. Deleting the RA domain in SNX27b (SNX27b-DRA) prevents the down-regulation of GIRK2c/GIRK3 channels. Similarly, a point mutation (K305A) in the RA domain disrupts regulation of GIRK2c/GIRK3 channels and reduces H-Ras binding in vitro. Finally, the dominant-negative H-Ras (S17N) occludes the SNX27b-dependent decrease in surface expression of GIRK2c/GIRK3 channels. Thus, the presence of a functional RA domain and the interaction with Ras-like G proteins comprise a novel mechanism for modulating SNX27b control of GIRK channel surface expression and cellular excitability.

# metadata.dc.rights[].value
cc-by (c) Bahima Borràs, Laia et al., 2013

# metadata.dc.source[].value
Articles publicats en revistes (Patologia i Terapèutica Experimental)

# metadata.dc.title[].value
Ras-association domain of sorting nexin 27 is critical for regulating expression of GIRK potassium channels