Carbonic anhydrase III (CAIII) is a member of a multigene family (at least six separate genes are known) that encode carbonic anhydrase isozymes. These carbonic anhydrases are a class of metalloenzymes that catalyze the reversible hydration of carbon dioxide and are differentially expressed in a number of cell types. The expression of the CA3 gene is strictly tissue-specific and present at high levels in skeletal muscle and much lower levels in cardiac and smooth muscle. CA3 is insufficient in muscles of Myasthenia Gravis patients.[6] A proportion of carriers of Duchenne muscle dystrophy have a higher CA3 level than normal. Autoantibodies to CA3 have been found to be significantly higher in patients with rheumatoid arthritis, systemic lupus erythematosus, and type 1 diabetes.[7] The gene spans 10.3 kb and contains seven exons and six introns.[8]
^"Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
^"Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
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^Du AL, Ren HM, Lu CZ, Tu JL, Xu CF, Sun YA (Mar 2009). "Carbonic anhydrase III is insufficient in muscles of myasthenia gravis patients". Autoimmunity. 42 (3): 209–15. doi:10.1080/08916930802668610. PMID19301202. S2CID3135174.
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Lloyd JC, Isenberg H, Hopkinson DA, Edwards YH (1986). "Isolation of a cDNA clone for the human muscle specific carbonic anhydrase, CAIII". Annals of Human Genetics. 49 (Pt 3): 241–51. doi:10.1111/j.1469-1809.1985.tb01698.x. PMID3000276. S2CID30747496.
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Edwards YH, Lloyd J, Parkar M, Povey S (1988). "The gene for human muscle specific carbonic anhydrase (CAIII) is assigned to chromosome 8". Annals of Human Genetics. 50 (Pt 1): 41–7. doi:10.1111/j.1469-1809.1986.tb01937.x. PMID3122635. S2CID22462255.
Väänänen HK, Paloniemi M, Vuori J (1985). "Purification and localization of human carbonic anhydrase. III. Typing of skeletal muscle fibers in paraffin embedded sections". Histochemistry. 83 (3): 231–5. doi:10.1007/bf00953989. PMID3930440. S2CID20902453.
Heath R, Schwartz MS, Brown IR, Carter ND (1983). "Carbonic anhydrase III in neuromuscular disorders". Journal of the Neurological Sciences. 59 (3): 383–8. doi:10.1016/0022-510X(83)90023-0. PMID6410007. S2CID8548497.
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