Transcriptional regulation of the KlDLD gene, encoding the mitochondrial enzyme D-lactate ferricytochrome c oxidoreductase in Kluyveromyces lactis : effect of Klhap2 and fog mutations

Expression of the Kluyveromyces lactis KlDLD gene, encoding the mitochondrial enzyme D-lactate ferricytochrome c oxidoreductase (D-LCR), is subject to two metabolic controls at the transcriptional level: induction by lactate, the substrate of the D-LCR enzyme, and repression by glucose. By Northern analysis we determined the kinetics of the two regulatory processes and, by measurement of the expression of LacZ gene fused to the KlDLD promoter, we identified cis-elements involved in glucose repression and lactate induction. The effect of trans-acting factors on the transcription of KlDLD has been analyzed. The KlDLD gene is controlled by the products of the FOG1 and FOG2 genes, previously identified as involved in glucose de-repression. Moreover, the KlDLD gene is regulated by the product of KlHAP2, homologous to the HAP2 gene which in Saccharomyces cerevisiae is required for the induction of genes encoding mitochondrial components, upon shifting from a fermentable to a non-fermentable carbon source. We have demonstated that the KlHAP2 gene is necessary both for the lactate induction of KlDLD mRNA synthesis and for growth on this oxidative carbon source.

Medienart:

Artikel

Erscheinungsjahr:

1998

Erschienen:

1998

Enthalten in:

Zur Gesamtaufnahme - volume:34

Enthalten in:

Current genetics - 34(1998), 1 vom: 01. Juli, Seite 12-20

Sprache:

Englisch

Beteiligte Personen:

Lodi, T [VerfasserIn]
Goffrini, P [VerfasserIn]
Bolondi, I [VerfasserIn]
Ferrero, I [VerfasserIn]

Themen:

Beta-Galactosidase
CCAAT-Binding Factor
Carrier Proteins
DNA, Fungal
EC 1.1.1.27
EC 1.1.2.3
EC 3.2.1.23
Fungal Proteins
Journal Article
L-Lactate Dehydrogenase
L-Lactate Dehydrogenase (Cytochrome)
Nuclear Proteins
Recombinant Fusion Proteins
Research Support, Non-U.S. Gov't
Transcription Factors

Anmerkungen:

Date Completed 18.09.1998

Date Revised 09.09.2019

published: Print

GENBANK: Y13084

Citation Status MEDLINE

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM096232056