In today's world, Ankyrin-1 is still a topic of great relevance and debate. Whether due to its impact on society, its influence on popular culture or its importance in everyday life, Ankyrin-1 continues to be a topic of interest for people of all ages and backgrounds. From its origins to its evolution today, Ankyrin-1 has been the subject of numerous studies, analyzes and discussions that seek to better understand its scope and meaning. In this article, we will explore different aspects of Ankyrin-1 and examine its importance in the current context.
Ankyrin 1, also known as ANK-1, and erythrocyte ankyrin, is a protein that in humans is encoded by the ANK1gene.[5][6]
Tissue distribution
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.[6]
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.[6]
Disease linkage
Mutations in erythrocytic ankyrin 1 have been associated in approximately half of all patients with hereditary spherocytosis.[6]
ANK1 shows altered methylation and expression in Alzheimer's disease.[7][8] A gene expression study of postmortem brains has suggested ANK1 interacts with interferon-γ signalling.[9]
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.[6]
The small ANK1 (sAnk1) protein splice variants makes contacts with obscurin, a giant protein surrounding the contractile apparatus in striated muscle.[10]
Lux SE, John KM, Bennett V (March 1990). "Analysis of cDNA for human erythrocyte ankyrin indicates a repeated structure with homology to tissue-differentiation and cell-cycle control proteins". Nature. 344 (6261): 36–42. Bibcode:1990Natur.344...36L. doi:10.1038/344036a0. PMID2137557. S2CID4351060.
Cianci CD, Giorgi M, Morrow JS (July 1988). "Phosphorylation of ankyrin down-regulates its cooperative interaction with spectrin and protein 3". Journal of Cellular Biochemistry. 37 (3): 301–315. doi:10.1002/jcb.240370305. PMID2970468. S2CID42349239.
Maruyama K, Sugano S (January 1994). "Oligo-capping: a simple method to replace the cap structure of eukaryotic mRNAs with oligoribonucleotides". Gene. 138 (1–2): 171–174. doi:10.1016/0378-1119(94)90802-8. PMID8125298.
Morgans CW, Kopito RR (August 1993). "Association of the brain anion exchanger, AE3, with the repeat domain of ankyrin". Journal of Cell Science. 105. 105 (4): 1137–1142. doi:10.1242/jcs.105.4.1137. PMID8227202.
Eber SW, Gonzalez JM, Lux ML, Scarpa AL, Tse WT, Dornwell M, et al. (June 1996). "Ankyrin-1 mutations are a major cause of dominant and recessive hereditary spherocytosis". Nature Genetics. 13 (2): 214–218. doi:10.1038/ng0696-214. PMID8640229. S2CID10946374.
del Giudice EM, Hayette S, Bozon M, Perrotta S, Alloisio N, Vallier A, et al. (June 1996). "Ankyrin Napoli: a de novo deletional frameshift mutation in exon 16 of ankyrin gene (ANK1) associated with spherocytosis". British Journal of Haematology. 93 (4): 828–834. doi:10.1046/j.1365-2141.1996.d01-1746.x. PMID8703812. S2CID28906962.
Suzuki Y, Yoshitomo-Nakagawa K, Maruyama K, Suyama A, Sugano S (October 1997). "Construction and characterization of a full length-enriched and a 5'-end-enriched cDNA library". Gene. 200 (1–2): 149–156. doi:10.1016/S0378-1119(97)00411-3. PMID9373149.