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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Sequence analysis of the complete Caenorhabditis elegans myosin heavy chain gene family.

The sequences of three myosin heavy chain (MHC) genes from Caenorhabditis elegans, myo-1, 2 and 3, are presented. These genes, together with unc-54, comprise the entire nematode sacromeric MHC family. Comparison of nematode MHC sequences and sarcomeric, smooth and non-muscle MHCs from other organisms highlights conserved sequence features of the MHC rod believed to be important for thick filament assembly. These include: conservation of sequence differences between individual 28 amino acid repeats; invariant placements of large aromatic residues, such as tryptophan, in the rod sequences; conservation of "weak spots" in the hydrophobic seam; and conservation of non-uniform charge distributions along the length of the rod. The rod sequences of the body wall isoforms A and B are more closely related to each other than to the pharyngeal isoforms C and D, suggesting that structural constraints have been imposed by their location within the same thick filament. We have also identified the major transcriptional start site for gene unc-54. Surprisingly, there are no TATA or other known transcription factor elements immediately upstream from the unc-54 start site, or in the upstream regions of the other genes of the C. elegans MHC gene family.[1]


  1. Sequence analysis of the complete Caenorhabditis elegans myosin heavy chain gene family. Dibb, N.J., Maruyama, I.N., Krause, M., Karn, J. J. Mol. Biol. (1989) [Pubmed]
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