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

GTP cyclohydrolase I from Tetrahymena pyriformis: cloning of cDNA and expression.

A full-length cDNA clone for GTP cyclohydrolase I (EC 3.5.4.16) was isolated from a Tetrahymena pyriformis cDNA library by plaque hybridization. The nucleotide sequence determination revealed that the length of the cDNA insert was 1516 bp. The coding region encoded a protein of 223 amino acid residues with a calculated molecular mass of 25 416 Da. The deduced amino acid sequence of Tetrahrymena GTP cyclohydrolase I showed sequence identity with that of Escherichia coli (55%). The identity of T. pyriformis GTP cyclohydrolase I with sequences of Dictyostelium discoideum, Saccharomyces cerevisiae, Drosophila melanogaster, mouse, rat, and human enzymes was less marked and was 30, 30, 25, 28, 28, and 27%, respectively. RNA blot analysis showed a single mRNA species of 2.1 kb in this protozoan. The mRNA level of GTP cyclohydrolase I increased during synchronous cell division induced by intermittent heat treatment. The results suggest that the mRNA expression is associated with the cell cycle of T. pyriformis.[1]

References

  1. GTP cyclohydrolase I from Tetrahymena pyriformis: cloning of cDNA and expression. Tazawa, M., Ohtsuki, M., Sumi-Ichinose, C., Shiraishi, H., Kuroda, R., Hagino, Y., Nakashima, S., Nozawa, Y., Ichinose, H., Nagatsu, T., Nomura, T. Comp. Biochem. Physiol. B, Biochem. Mol. Biol. (2000) [Pubmed]
 
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