alexa A novel striated tropomyosin incorporated into organized myofibrils of cardiomyocytes in cell and organ culture.
Medicine

Medicine

Anatomy & Physiology: Current Research

Author(s): Zajdel RW, Sanger JM, Denz CR, Lee S, Dube S,

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Abstract Striated muscle tropomyosin is classically described as consisting of 10 exons, 1a, 2b, 3, 4, 5, 6b, 7, 8, and 9a/b, in both skeletal and cardiac muscle. A novel isoform found in embryonic axolotl heart maintains exon 9a/b of striated muscle but also has a smooth muscle exon 2a instead of exon 2b. Translation and subsequent incorporation into organized myofibrils, with both isoforms, was demonstrated with green fluorescent protein fusion protein construct. Mutant axolotl hearts lack sufficient tropomyosin in the ventricle and this smooth/striated chimeric tropomyosin was sufficient to replace the missing tropomyosin and form organized myofibrils.
This article was published in FEBS Lett and referenced in Anatomy & Physiology: Current Research

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