GNAI3 ist ein Gen, das durch das Symbol GNAI3 kodiert wird. Im Allgemeinen auch bezeichnet als: Guanine nucleotide-binding protein G(i) subunit alpha; G(i) alpha-3. GNAI3 hat eine Masse von 40.53kDa, eine Aminosäurelänge von 354, und ist an Auriculocondylar syndrome 1 beteiligt.
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Gen- und Proteininformationen
UniProt Zusammenfassung
Heterotrimeric guanine nucleotide-binding proteins (G proteins) function as transducers downstream of G protein-coupled receptors (GPCRs) in numerous signaling cascades. The alpha chain contains the guanine nucleotide binding site and alternates between an active, GTP-bound state and an inactive, GDP-bound state. Signaling by an activated GPCR promotes GDP release and GTP binding. The alpha subunit has a low GTPase activity that converts bound GTP to GDP, thereby terminating the signal. Both GDP release and GTP hydrolysis are modulated by numerous regulatory proteins (PubMed:8774883, PubMed:18434541, PubMed:19478087). Signaling is mediated via effector proteins, such as adenylate cyclase. Inhibits adenylate cyclase activity, leading to decreased intracellular cAMP levels (PubMed:19478087). Stimulates the activity of receptor-regulated K(+) channels (PubMed:2535845). The active GTP-bound form prevents the association of RGS14 with centrosomes and is required for the translocation of RGS14 from the cytoplasm to the plasma membrane. May play a role in cell division (PubMed:17635935).
Entrez Zusammenfassung
Guanine nucleotide-binding proteins (G proteins) are involved as modulators or transducers in various transmembrane signaling pathways. G proteins are composed of 3 units: alpha, beta and gamma. This gene encodes an alpha subunit and belongs to the G-alpha family. Mutation in this gene, resulting in a gly40-to-arg substitution, is associated with auriculocondylar syndrome, and shown to affect downstream targets in the G protein-coupled endothelin receptor pathway.
Rolle bei Krankheiten
Auriculocondylar syndrome 1: An autosomal dominant craniofacial malformation syndrome characterized by variable mandibular anomalies, including mild to severe micrognathia, temporomandibular joint ankylosis, cleft palate, and a characteristic ear malformation that consists of separation of the lobule from the external ear, giving the appearance of a question mark (question-mark ear). Other frequently described features include prominent cheeks, cupped and posteriorly rotated ears, preauricular tags, and microstomia.
Sequenzähnlichkeiten
Belongs to the G-alpha family. G(i/o/t/z) subfamily.
Posttranslationale Modifikation
(Microbial infection) Deamidated at Gln-204 by Photorhabdus asymbiotica toxin PAU_02230, blocking GTP hydrolysis of heterotrimeric GNAQ or GNA11 and G-alphai (GNAI1, GNAI2 or GNAI3) proteins, thereby activating RhoA.
Zellort
Cytoplasm. Cell membrane. Cytoplasm > Cytoskeleton > Microtubule organizing center > Centrosome.
Localizes in the centrosomes of interphase and mitotic cells. Detected at the cleavage furrow and/or the midbody.
