Core regulatory components of the PHO pathway are conserved in the methylotrophic yeast Hansenula polymorpha

Current Genetics
Ying ZhouYoshinobu Kaneko

Abstract

To gain better understanding of the diversity and evolution of the gene regulation system in eukaryotes, the phosphate signal transduction (PHO) pathway in non-conventional yeasts has been studied in recent years. Here we characterized the PHO pathway of Hansenula polymorpha, which is genetically tractable and distantly related to Saccharomyces cerevisiae and Schizosaccharomyces pombe, in order to get more information for the diversity and evolution of the PHO pathway in yeasts. We generated several pho gene-deficient mutants based on the annotated draft genome of H. polymorpha BY4329. Except for the Hppho2-deficient mutant, these mutants exhibited the same phenotype of repressible acid phosphatase (APase) production as their S. cerevisiae counterparts. Subsequently, Hppho80 and Hppho85 mutants were isolated as suppressors of the Hppho81 mutation and Hppho4 was isolated from Hppho80 and Hppho85 mutants as the sole suppressor of the Hppho80 and Hppho85 mutations. To gain more complete delineation of the PHO pathway in H. polymorpha, we screened for UV-irradiated mutants that expressed APase constitutively. As a result, three classes of recessive constitutive mutations and one dominant constitutive mutation were isolated. Genetic...Continue Reading

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Citations

Dec 11, 2020·International Immunopharmacology·Joshua Adedeji BolarinAdenike Bernice-Eloise Adeoye

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Methods Mentioned

BETA
PCR
reverse-transcription PCR

Software Mentioned

BLASTP
BLASTX

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