The epidermal intermediate filament proteins of tunicates are distant keratins; a polymerisation-competent hetero coiled coil of the Styela D protein and Xenopus keratin 8.

@article{Wang2000TheEI,
  title={The epidermal intermediate filament proteins of tunicates are distant keratins; a polymerisation-competent hetero coiled coil of the Styela D protein and Xenopus keratin 8.},
  author={Jian Wang and Anton Karabinos and J{\"u}rgen Sch{\"u}nemann and Dieter Riemer and Klaus -Josef Weber},
  journal={European journal of cell biology},
  year={2000},
  volume={79 7},
  pages={478-87}
}
Two novel cytoplasmic intermediate filament (IF) proteins (C and D) from the tunicate (urochordate) Styela are characterised as putative keratin orthologs. The coexpression of C and D in all epidermal cells and the obligatory heteropolymeric IF assembly of the recombinant proteins argue for keratin orthologs, but the sequences do not directly reveal which protein behaves as a keratin I or II ortholog. This problem is solved by the finding that keratin 8, a type II keratin from man or Xenopus… CONTINUE READING

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