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- W2133424890 abstract "Abstract Five spontaneous, allelic mutations in the α-spectrin gene, Spna1, have been identified in mice (spherocytosis [sph], sph1J, sph2J, sph2BC, sphDem). All cause severe hemolytic anemia. Here, analysis of 3 new alleles reveals previously unknown consequences of red blood cell (RBC) spectrin deficiency. In sph3J, a missense mutation (H2012Y) in repeat 19 introduces a cryptic splice site resulting in premature termination of translation. In sphIhj, a premature stop codon occurs (Q1853Stop) in repeat 18. Both mutations result in markedly reduced RBC membrane spectrin content, decreased band 3, and absent β-adducin. Reevaluation of available, previously described sph alleles reveals band 3 and adducin deficiency as well. In sph4J, a missense mutation occurs in the C-terminal EF hand domain (C2384Y). Notably, an equally severe hemolytic anemia occurs despite minimally decreased membrane spectrin with normal band 3 levels and present, although reduced, β-adducin. The severity of anemia in sph4J indicates that the highly conserved cysteine residue at the C-terminus of α-spectrin participates in interactions critical to membrane stability. The data reinforce the notion that a membrane bridge in addition to the classic protein 4.1-p55-glycophorin C linkage exists at the RBC junctional complex that involves interactions between spectrin, adducin, and band 3." @default.
- W2133424890 created "2016-06-24" @default.
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- W2133424890 date "2010-03-04" @default.
- W2133424890 modified "2023-09-28" @default.
- W2133424890 title "Analysis of novel sph (spherocytosis) alleles in mice reveals allele-specific loss of band 3 and adducin in α-spectrin–deficient red cells" @default.
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- W2133424890 doi "https://doi.org/10.1182/blood-2009-07-232199" @default.
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