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FEMS Microbiol Lett. 1997 Jun 15;151(2):103-14.

Carbon repression in Aspergilli.

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  • 1Section Molecular Genetics of Industrial Microorganisms, Wageningen Agricultural University, The Netherlands.


Many microorganisms prefer easily metabolizable carbon sources over alternative, less readily metabolized carbon sources. One of the mechanisms to achieve this is repression of the synthesis of enzymes related to catabolism of the alternative carbon sources, i.e. carbon repression. It is now clear that in Aspergillus nidulans and Aspergillus niger the repressor protein CREA plays a major role in carbon repression. CREA inhibits transcription of many target genes by binding to specific sequences in the promoter of these genes. Unfortunately there is little information on other components of the signalling pathway that triggers repression by CREA. In this review we summarize the current understanding of carbon repression in Aspergilli.

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