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. 1986 Dec 1;240(2):481–488. doi: 10.1042/bj2400481

Sequence analysis and transformation by the catabolic 3-dehydroquinase (QUTE) gene from Aspergillus nidulans.

A J Da Silva, H Whittington, J Clements, C Roberts, A R Hawkins
PMCID: PMC1147441  PMID: 2949740

Abstract

The induction of catabolic 3-dehydroquinase by quinic acid in Aspergillus nidulans has been shown to involve transcriptional control and yields a single major 0.8 kb mRNA. The nucleotide sequence of the catabolic 3-dehydroquinase QUTE gene has been determined and contains a single uninterrupted open reading frame of 462 bases encoding a 16,505 Da protein of 153 residues. Comparison with the corresponding QA2 gene of Neurospora crassa reveals the absence of 75 nucleotides encoding 25 amino acids from the centre of the QUTE gene of A. nidulans and the presence of 21 additional nucleotides at its 3' end. There is no nucleotide or amino acid homology between these two elements. A 16 bp inverted repeat (5' GGCAGAGCGTTCTGCC) shows similarity to such repeats found in other fungal promoters. The functional integrity of the QUTE gene was demonstrated by the transformation of a qutE mutant strain which regains growth on quinic acid as sole carbon source. Four of the twelve transformed strains examined contained vector sequences integrated at the qutE locus, and these strains all exhibited normal regulation of 3-dehydroquinase even when 16 copies of the QUTE gene were present.

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Selected References

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