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    FEBS Lett. 1995 May 29;365(2-3):198-202.

    PTF1 encodes an essential protein in Saccharomyces cerevisiae, which shows strong homology with a new putative family of PPIases.

    Hani J, Stumpf G, Domdey H.

    Genzentrum, Ludwig-Maximilians-Universität München, Germany.

    Complementation of a temperature sensitive mutant of the yeast Saccharomyces cerevisiae resulted in the isolation of PTF1 (processing/termination factor 1), an essential gene encoding a putative 3'-end processing or transcription termination factor of pre-mRNAs. Ptf1p shows significant homology to a newly discovered family of PPIases. This family is characterized by its insensitivity to immunosuppressive drugs and the lack of homology with cyclophilins and FK-506 binding proteins [Rahfeld et al. (1994) FEBS Lett. 352, 180-184]. Should Ptf1p display PPIase activity, it would be the first characterized, eukaryotic member of this putative family, which is essential for growth.

    PMID: 7781779 [PubMed - indexed for MEDLINE]

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