Amino acid sequence of the carboxy-terminal part of an acidic type I cytokeratin of molecular weight 51 000 from Xenopus laevis epidermis as predicted from the cDNA sequence.
AUTOR(ES)
Hoffmann, W
RESUMO
The DNA sequence of a clone from a cDNA library made from Xenopus laevis skin is described. This sequence represents the 3'-terminal end of an mRNA which codes for an epidermal cytokeratin polypeptide of mol. wt. 51 000 of the acidic (type I) subfamily as identified by hybridization-selection of mRNAs, followed by gel electrophoretic identification of the polypeptides synthesized by translation in vitro. The partial amino acid sequence of the amphibian cytokeratin shows strong similarity to type I cytoskeletal keratins from human (mol. wt. 50 000) and murine (mol. wt. 59 000) epidermis. In the non alpha-helical tail region the human and the non-mammalian (Xenopus) keratins are more similar to each other than to the murine protein, indicating that the former are equivalent cytokeratin polypeptides and belonging to a special subclass of type I keratin polypeptides devoid of glycine-rich regions in the carboxy-terminal portion. The evolutionary conservativity of the genes coding for cytokeratins is discussed.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=557512Documentos Relacionados
- Nucleotide sequence of a cDNA encoding ribosomal acidic phosphoprotein P1 from Dictyostelium discoideum: identification of a novel carboxy-terminal sequence in 'A' proteins.
- Cloning of cDNA and amino acid sequence of a cytokeratin expressed in oocytes of Xenopus laevis.
- Xenopus laevis Cu,Zn superoxide dismutase B cDNA sequence.
- Xenopus laevis ribosomal protein S1a cDNA sequence.
- Functional Analysis of Carboxy-Terminal Deletion Mutants of c-Myb