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    The Aspergillus nidulans stress response transcription factor StzA is ascomycete-specific and shows species-specific polymorphisms in the C-terminal region.

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    Authors
    Chilton, Ian J.
    Delaney, C. E,
    Barham-Morris, J.
    Fincham, Daron A.
    Hooley, Paul
    Whitehead, Michael P.
    Issue Date
    2008
    
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    Abstract
    Orthologues of the Aspergillus nidulans gene stzA were identified and characterised in an additional 19 fungi. These orthologues were restricted to, and found within all the Pezizomycotina subphyla of the Ascomycota, for which data are available, but not the Saccharomycotina or Taphrinomycotina subphyla. Intron analysis indicated that both intron loss and gain have occurred in this gene. The orthologous proteins demonstrate considerable size variation (between 663 and 897 amino acids); with almost all this variability accounted for by a hyper-variable region that is carboxy terminal to the zinc finger region. The Hypocrea jecorina orthologue (ACE1) has the binding site 5'AGGCA. There is evidence of competition, or interaction, between the ACE1/StzA and AreA binding sites in promoters of stzA and its orthologues, as well as genes involved in the metabolism of amino acids. The A. nidulans and A. fumigatus cpcA promoters have seven potential ACE1/StzA binding sites, six of which are highly conserved in position. Two very closely positioned sites are conserved across 14 of the 19 fungi analysed. Potential CpcA binding sites (5'TGAC/GTCA) have been identified between -50 and -170bp of the ATG start in the promoters of 16 of the stzA orthologues.
    Citation
    Mycological research, 112 (Pt 12):1435-46
    Publisher
    Elsevier
    Journal
    Mycological research
    URI
    http://hdl.handle.net/2436/117169
    DOI
    10.1016/j.mycres.2008.06.028
    PubMed ID
    18678248
    Type
    Journal article
    Language
    en
    ISSN
    0953-7562
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.mycres.2008.06.028
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