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XB-ART-6845
Proc Natl Acad Sci U S A 2002 Jul 23;9915:9755-60. doi: 10.1073/pnas.152094799.
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R9AP, a membrane anchor for the photoreceptor GTPase accelerating protein, RGS9-1.

Hu G , Wensel TG .


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The regulator of G protein signaling (RGS)-9-1.G(beta 5) complex forms the GTPase accelerating protein for G(alpha t) in vertebrate photoreceptors. Although the complex is soluble when expressed in vitro, extraction of the endogenous protein from membranes requires detergents. The detergent extracts contain a complex of RGS9-1, G(beta 5), G(alpha t), and a 25-kDa phosphoprotein, R9AP (RGS9-1-Anchor Protein). R9AP is encoded by one intronless gene in both human and mouse. Full or partial cDNA or genomic clones were obtained from mice, cattle, human, zebrafish, and Xenopus laevis. R9AP mRNA was detected only in the retina, and the protein only in photoreceptors. R9AP binds to the N-terminal domain of RGS9-1, and anchors it to the disk membrane via a C-terminal transmembrane helix.

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Species referenced: Xenopus laevis
Genes referenced: rgs9 rgs9bp

References [+] :
Angleson, A GTPase-accelerating factor for transducin, distinct from its effector cGMP phosphodiesterase, in rod outer segment membranes. 1993, Pubmed