Expression of the Aspergillus nidulans xlnC gene encoding the X34 endo-xylanase is subject to carbon catabolite repression and pH control

Abstract

Expression of the Aspergillus nidulans xylanase gene xlnC is subject to regulation by carbon catabolite repression and ambient pH. In the presence of glucose, xlnC transcription is repressed by the zinc finger transcription factor CreA. These data have been confirmed using the extremely derepressed mutant creA d 30. Expression of xlnC is elevated at alkaline ambient pH and also in alkalinity-mimicking A. nidulans mutants.