The protein encoded by this gene, Ankyrin 1, is the prototype of the ankyrin family, was first discovered in erythrocytes, but since has also been found in brain and muscles.[2]
Genetics
Complex patterns of alternative splicing in the regulatory domain, giving rise to different isoforms of ankyrin 1 have been described, however, the precise functions of the various isoforms are not known. Alternative polyadenylation accounting for the different sized erythrocytic ankyrin 1 mRNAs, has also been reported. Truncated muscle-specific isoforms of ankyrin 1 resulting from usage of an alternate promoter have also been identified.[2]
Disease linkage
Mutations in erythrocytic ankyrin 1 have been associated in approximately half of all patients with hereditary spherocytosis.[2]
ANK1 shows altered methylation and expression in Alzheimer's disease.[3][4] A gene expression study of postmortem brains has suggested ANK1 interacts with interferon-γ signalling.[5]
Function
The ANK1 protein belongs to the ankyrin family that are believed to link the integral membrane proteins to the underlying spectrin-actincytoskeleton and play key roles in activities such as cell motility, activation, proliferation, contact, and maintenance of specialized membrane domains. Multiple isoforms of ankyrin with different affinities for various target proteins are expressed in a tissue-specific, developmentally regulated manner. 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.[2]
The small ANK1 (sAnk1) protein splice variants makes contacts with obscurin, a giant protein surrounding the contractile apparatus in striated muscle.[6]
↑De Jager, P. L.; Srivastava, G; Lunnon, K; Burgess, J; Schalkwyk, L. C.; Yu, L; Eaton, M. L.; Keenan, B. T.; Ernst, J; McCabe, C; Tang, A; Raj, T; Replogle, J; Brodeur, W; Gabriel, S; Chai, H. S.; Younkin, C; Younkin, S. G.; Zou, F; Szyf, M; Epstein, C. B.; Schneider, J. A.; Bernstein, B. E.; Meissner, A; Ertekin-Taner, N; Chibnik, L. B.; Kellis, M; Mill, J; Bennett, D. A. (2014). "Alzheimer's disease: Early alterations in brain DNA methylation at ANK1, BIN1, RHBDF2 and other loci". Nature Neuroscience. 17 (9): 1156–63. doi:10.1038/nn.3786. PMC4292795. PMID25129075.
↑Borzok MA, Catino DH, Nicholson JD, Kontrogianni-Konstantopoulos A, Bloch RJ (November 2007). "Mapping the binding site on small ankyrin 1 for obscurin". J. Biol. Chem. 282 (44): 32384–96. doi:10.1074/jbc.M704089200. PMID17720975.
↑Kontrogianni-Konstantopoulos, Aikaterini; Bloch Robert J (February 2003). "The hydrophilic domain of small ankyrin-1 interacts with the two N-terminal immunoglobulin domains of titin". J. Biol. Chem. United States. 278 (6): 3985–91. doi:10.1074/jbc.M209012200. ISSN0021-9258. PMID12444090.
↑Nicolas, Virginie; Le Van Kim, Caroline; Gane, Pierre; Birkenmeier, Connie; Cartron, Jean-Pierre; Colin, Yves; Mouro-Chanteloup, Isabelle (July 2003). "Rh-RhAG/ankyrin-R, a new interaction site between the membrane bilayer and the red cell skeleton, is impaired by Rh(null)-associated mutation". J. Biol. Chem. United States. 278 (28): 25526–33. doi:10.1074/jbc.M302816200. ISSN0021-9258. PMID12719424.
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Bourguignon LY, Lokeshwar VB, Chen X, Kerrick WG (1994). "Hyaluronic acid-induced lymphocyte signal transduction and HA receptor (GP85/CD44)-cytoskeleton interaction". J. Immunol. 151 (12): 6634–44. PMID7505012.
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Morgans CW, Kopito RR (1993). "Association of the brain anion exchanger, AE3, with the repeat domain of ankyrin". J. Cell Sci. 105. ( Pt 4): 1137–42. PMID8227202.
Bourguignon LY, Jin H, Iida N, et al. (1993). "The involvement of ankyrin in the regulation of inositol 1,4,5-trisphosphate receptor-mediated internal Ca2+ release from Ca2+ storage vesicles in mouse T-lymphoma cells". J. Biol. Chem. 268 (10): 7290–7. PMID8385102.
Eber SW, Gonzalez JM, Lux ML, et al. (1996). "Ankyrin-1 mutations are a major cause of dominant and recessive hereditary spherocytosis". Nat. Genet. 13 (2): 214–8. doi:10.1038/ng0696-214. PMID8640229.
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Gallagher PG, Tse WT, Scarpa AL, et al. (1997). "Structure and organization of the human ankyrin-1 gene. Basis for complexity of pre-mRNA processing". J. Biol. Chem. 272 (31): 19220–8. doi:10.1074/jbc.272.31.19220. PMID9235914.
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