Ankyrin-3 (ANK-3), also known as ankyrin-G, is a protein from ankyrin family that in humans is encoded by the ANK3 gene.[5][6]
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The protein encoded by this gene, ankyrin-3 is an immunologically distinct gene product from ankyrins ANK1 and ANK2, and was originally found at the axonal initial segment and nodes of Ranvier of neurons in the central and peripheral nervous systems. Alternatively spliced variants may be expressed in other tissues. Although multiple transcript variants encoding several different isoforms have been found for this gene, the full-length nature of only two have been characterized.[5]
Within the nervous system, ankyrin-G is specifically localized to the neuromuscular junction, the axon initial segment and the Nodes of Ranvier.[7] Within the nodes of Ranvier where action potentials are actively propagated, ankyrin-G has long been thought to be the intermediate binding partner to neurofascin and voltage-gated sodium channels.[8] The genetic deletion of ankyrin-G from multiple neuron types has shown that ankyrin-G is required for the normal clustering of voltage-gated sodium channels at the axon hillock and for action potential firing.[9][10]
The ANK3 protein associates with the cardiac sodium channel Nav1.5 (SCN5A). Both proteins are highly expressed at ventricular intercalated disc and T-tubule membranes in cardiomyocytes. A mutation in the Nav1.5 protein blocks interaction with ANK3 binding and therefore disrupts surface expression of Nav1.5 in cardiomyocytes resulting in Brugada syndrome, a type of cardiac arrhythmia.[11]
Other mutations in the ANK3 gene may be involved in the bipolar disorder and intellectual disability.[12][13][14][15]
The protein encoded by the ANK3 gene is a member of the ankyrin family of proteins that link the integral membrane proteins to the underlying spectrin-actin cytoskeleton. Ankyrins play key roles in activities such as cell motility, activation, proliferation, contact and the maintenance of specialized membrane domains. Most ankyrins are typically composed of three structural domains: an amino-terminal domain containing multiple ankyrin repeats; a central region with a highly conserved spectrin binding domain; and a carboxy-terminal regulatory domain which is the least conserved and subject to variation.[5]
Kapfhamer D, Miller DE, Lambert S, Bennett V, Glover TW, Burmeister M (May 1995). "Chromosomal localization of the ankyrinG gene (ANK3/Ank3) to human 10q21 and mouse 10". Genomics. 27 (1): 189–191. doi:10.1006/geno.1995.1023. PMID 7665168.
- Lopez C, Métral S, Eladari D, Drevensek S, Gane P, Chambrey R, et al. (March 2005). "The ammonium transporter RhBG: requirement of a tyrosine-based signal and ankyrin-G for basolateral targeting and membrane anchorage in polarized kidney epithelial cells". The Journal of Biological Chemistry. 280 (9): 8221–8228. doi:10.1074/jbc.M413351200. PMID 15611082.
- Kizhatil K, Yoon W, Mohler PJ, Davis LH, Hoffman JA, Bennett V (January 2007). "Ankyrin-G and beta2-spectrin collaborate in biogenesis of lateral membrane of human bronchial epithelial cells". The Journal of Biological Chemistry. 282 (3): 2029–2037. doi:10.1074/jbc.M608921200. PMID 17074766.
- Weimer JM, Chattopadhyay S, Custer AW, Pearce DA (May 2005). "Elevation of Hook1 in a disease model of Batten disease does not affect a novel interaction between Ankyrin G and Hook1". Biochemical and Biophysical Research Communications. 330 (4): 1176–1181. doi:10.1016/j.bbrc.2005.03.103. PMID 15823567.
- Shirahata E, Iwasaki H, Takagi M, Lin C, Bennett V, Okamura Y, et al. (September 2006). "Ankyrin-G regulates inactivation gating of the neuronal sodium channel, Nav1.6". Journal of Neurophysiology. 96 (3): 1347–1357. doi:10.1152/jn.01264.2005. PMID 16775201.
- Schulze TG, Detera-Wadleigh SD, Akula N, Gupta A, Kassem L, Steele J, et al. (May 2009). "Two variants in Ankyrin 3 (ANK3) are independent genetic risk factors for bipolar disorder". Molecular Psychiatry. 14 (5): 487–491. doi:10.1038/mp.2008.134. PMC 2793269. PMID 19088739.
- Morgan AR, Turic D, Jehu L, Hamilton G, Hollingworth P, Moskvina V, et al. (September 2007). "Association studies of 23 positional/functional candidate genes on chromosome 10 in late-onset Alzheimer's disease". American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics. 144B (6): 762–770. doi:10.1002/ajmg.b.30509. PMID 17373700. S2CID 26081707.
- Morgan AR, Hamilton G, Turic D, Jehu L, Harold D, Abraham R, et al. (September 2008). "Association analysis of 528 intra-genic SNPs in a region of chromosome 10 linked to late onset Alzheimer's disease". American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics. 147B (6): 727–731. doi:10.1002/ajmg.b.30670. PMID 18163421. S2CID 13916214.
- Grupe A, Li Y, Rowland C, Nowotny P, Hinrichs AL, Smemo S, et al. (January 2006). "A scan of chromosome 10 identifies a novel locus showing strong association with late-onset Alzheimer disease". American Journal of Human Genetics. 78 (1): 78–88. doi:10.1086/498851. PMC 1380225. PMID 16385451.
- Stabach PR, Devarajan P, Stankewich MC, Bannykh S, Morrow JS (November 2008). "Ankyrin facilitates intracellular trafficking of alpha1-Na+-K+-ATPase in polarized cells". American Journal of Physiology. Cell Physiology. 295 (5): C1202–C1214. doi:10.1152/ajpcell.00273.2008. PMC 2584975. PMID 18768923.
- Sohet F, Colin Y, Genetet S, Ripoche P, Métral S, Le Van Kim C, et al. (September 2008). "Phosphorylation and ankyrin-G binding of the C-terminal domain regulate targeting and function of the ammonium transporter RhBG". The Journal of Biological Chemistry. 283 (39): 26557–26567. doi:10.1074/jbc.M803120200. PMC 3258915. PMID 18635543.
- Ignatiuk A, Quickfall JP, Hawrysh AD, Chamberlain MD, Anderson DH (March 2006). "The smaller isoforms of ankyrin 3 bind to the p85 subunit of phosphatidylinositol 3'-kinase and enhance platelet-derived growth factor receptor down-regulation". The Journal of Biological Chemistry. 281 (9): 5956–5964. doi:10.1074/jbc.M510032200. PMID 16377635.
- Colland F, Jacq X, Trouplin V, Mougin C, Groizeleau C, Hamburger A, et al. (July 2004). "Functional proteomics mapping of a human signaling pathway". Genome Research. 14 (7): 1324–1332. doi:10.1101/gr.2334104. PMC 442148. PMID 15231748.
- Glinsky GV, Berezovska O, Glinskii AB (June 2005). "Microarray analysis identifies a death-from-cancer signature predicting therapy failure in patients with multiple types of cancer". The Journal of Clinical Investigation. 115 (6): 1503–1521. doi:10.1172/JCI23412. PMC 1136989. PMID 15931389.
- McEwen DP, Meadows LS, Chen C, Thyagarajan V, Isom LL (April 2004). "Sodium channel beta1 subunit-mediated modulation of Nav1.2 currents and cell surface density is dependent on interactions with contactin and ankyrin". The Journal of Biological Chemistry. 279 (16): 16044–16049. doi:10.1074/jbc.M400856200. PMID 14761957.
- Ota T, Suzuki Y, Nishikawa T, Otsuki T, Sugiyama T, Irie R, et al. (January 2004). "Complete sequencing and characterization of 21,243 full-length human cDNAs". Nature Genetics. 36 (1): 40–45. doi:10.1038/ng1285. PMID 14702039.
- Wang J, Robinson JF, O'Neil CH, Edwards JY, Williams CM, Huff MW, et al. (2006). "Ankyrin G overexpression in Hutchinson-Gilford progeria syndrome fibroblasts identified through biological filtering of expression profiles". Journal of Human Genetics. 51 (11): 934–942. doi:10.1007/s10038-006-0042-0. PMID 17033732.
- Kizhatil K, Davis JQ, Davis L, Hoffman J, Hogan BL, Bennett V (September 2007). "Ankyrin-G is a molecular partner of E-cadherin in epithelial cells and early embryos". The Journal of Biological Chemistry. 282 (36): 26552–26561. doi:10.1074/jbc.M703158200. PMID 17620337.
- Kizhatil K, Bennett V (April 2004). "Lateral membrane biogenesis in human bronchial epithelial cells requires 190-kDa ankyrin-G". The Journal of Biological Chemistry. 279 (16): 16706–16714. doi:10.1074/jbc.M314296200. PMID 14757759.
This article incorporates text from the United States National Library of Medicine, which is in the public domain.