We cloned and sequenced the pyruvate decarboxylase (PDC; EC 4.1.1.1) structural gene KlPDCA in the yeast Kluyveromyces lactis and found it to be allelic to the previously isolated rag6 mutation. The putative amino acid sequence of the KlPdcAp appeared to be highly homologous to those of the yeast Pdc proteins identified so far. The disruption of KIPDCA indicated that it is the only PDC structural gene in K. lactis, as evidenced by the lack of PDC activity and ethanol production in the pdcAdelta strains and by the absence of growth on glucose in the presence of respiratory inhibitors. It was observed that expression of the KlPDCA gene is induced by glucose at the transcriptional level. Transcription of the gene was reduced in the ragl, rag2, rag5 and rag8 mutants, which are defective for the low-affinity glucose permease, phosphoglucose isomerase, hexokinase, and a positive regulator of RAG1 expression, respectively.

The 'petite negative' yeast Kluyveromyces lactis has a single gene expressing pyruvate decarboxylase activity / Bianchi, Michele Maria; Tizzani, L.; Destruelle, M.; Frontali, Laura; WESOLOWSKI LOUVEL, M.. - In: MOLECULAR MICROBIOLOGY. - ISSN 0950-382X. - 19:(1996), pp. 27-36.

The 'petite negative' yeast Kluyveromyces lactis has a single gene expressing pyruvate decarboxylase activity

BIANCHI, Michele Maria;FRONTALI, Laura;
1996

Abstract

We cloned and sequenced the pyruvate decarboxylase (PDC; EC 4.1.1.1) structural gene KlPDCA in the yeast Kluyveromyces lactis and found it to be allelic to the previously isolated rag6 mutation. The putative amino acid sequence of the KlPdcAp appeared to be highly homologous to those of the yeast Pdc proteins identified so far. The disruption of KIPDCA indicated that it is the only PDC structural gene in K. lactis, as evidenced by the lack of PDC activity and ethanol production in the pdcAdelta strains and by the absence of growth on glucose in the presence of respiratory inhibitors. It was observed that expression of the KlPDCA gene is induced by glucose at the transcriptional level. Transcription of the gene was reduced in the ragl, rag2, rag5 and rag8 mutants, which are defective for the low-affinity glucose permease, phosphoglucose isomerase, hexokinase, and a positive regulator of RAG1 expression, respectively.
1996
01 Pubblicazione su rivista::01a Articolo in rivista
The 'petite negative' yeast Kluyveromyces lactis has a single gene expressing pyruvate decarboxylase activity / Bianchi, Michele Maria; Tizzani, L.; Destruelle, M.; Frontali, Laura; WESOLOWSKI LOUVEL, M.. - In: MOLECULAR MICROBIOLOGY. - ISSN 0950-382X. - 19:(1996), pp. 27-36.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/48311
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