O77621 Alpha-1A ADRA1A 9615 None SL-0178 SL-0182 Nucleus membrane; Multi-pass membrane protein. Cell membrane {ECO:0000250|UniProtKB:P35348}; Multi-pass membrane protein {ECO:0000255}. Cytoplasm {ECO:0000250|UniProtKB:P35348}. Membrane, caveola {ECO:0000250|UniProtKB:P35348}. Note=Location at the nuclear membrane facilitates heterooligomerization and regulates ERK- mediated signaling in cardiac myocytes. Colocalizes with GNAQ, PLCB1 as well as LAP2 at the nuclear membrane of cardiac myocytes (By similarity). {ECO:0000250}. UNIPROT O77621 Pfam PF00001 PROSITE PS00237 PROSITE PS50262 This alpha-adrenergic receptor mediates its action by association with G proteins that activate a phosphatidylinositol- calcium second messenger system. Its effect is mediated by G(q) and G(11) proteins. Nuclear ADRA1A-ADRA1B heterooligomers regulate phenylephrine (PE)-stimulated ERK signaling in cardiac myocytes (By similarity). {ECO:0000250}. GO:0005901 GO:0005737 GO:0005887 GO:0031965 GO:0005634 GO:0005886 GO:0004937 GO:0004930 GO:0046982 GO:0071880 GO:0007267 GO:0007200 GO:0007204 GO:0001996 GO:0043410 GO:0045907 GO:0055117 Transmembrane UniProt By Similarity {ECO:0000250} MVFLSGNASDSSNCTHPPAPVNISKAILLGVILGGLIIFGVLGNILVILSVACHRHLHSVTHYYIVNLAVADLLLTSTVLPFSAIFEILGYWAFGRVFCNIWAAVDVLCCTASIMGLCIISIDRYIGVSYPLRYPTIVTQKRGLMALLCVWALSLVISIGPLFGWRQPAPEDETICQITEEPGYVLFSALGSFYVPLTIILVMYCRVYVVAKRESRGLKSGLKTDKSDSEQVTLRIHRKNAPVGGTGVSSAKNKTHFSVRLLKFSREKKAAKTLGIVVGCFVLCWLPFFLVMPIG 295