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Main Title: The low affinity glucose transporter HxtB is also involved in glucose signalling and metabolism in Aspergillus nidulans
Author(s): dos Reis, Thaila Fernanda
Nitsche, Benjamin M.
de Lima, Pollyne Borborema Almeida
de Assis, Leandro José
Mellado, Laura
Harris, Steven D.
Meyer, Vera
dos Santos, Renato A. Corrêa
Riaño-Pachón, Diego M.
Ries, Laure Nicolas Annick
Goldman, Gustavo H.
Type: Article
Language Code: en
Abstract: One of the drawbacks during second-generation biofuel production from plant lignocellulosic biomass is the accumulation of glucose, the preferred carbon source of microorganisms, which causes the repression of hydrolytic enzyme secretion by industrially relevant filamentous fungi. Glucose sensing, subsequent transport and cellular signalling pathways have been barely elucidated in these organisms. This study therefore characterized the transcriptional response of the filamentous fungus Aspergillus nidulans to the presence of high and low glucose concentrations under continuous chemostat cultivation with the aim to identify novel factors involved in glucose sensing and signalling. Several transcription factor- and transporter-encoding genes were identified as being differentially regulated, including the previously characterized glucose and xylose transporter HxtB. HxtB was confirmed to be a low affinity glucose transporter, localizing to the plasma membrane under low- and high-glucose conditions. Furthermore, HxtB was shown to be involved in conidiation-related processes and may play a role in downstream glucose signalling. A gene predicted to encode the protein kinase PskA was also identified as being important for glucose metabolism. This study identified several proteins with predicted roles in glucose metabolic processes and provides a foundation for further investigation into the response of biotechnologically important filamentous fungi to glucose.
Issue Date: 31-Mar-2017
Date Available: 3-May-2018
DDC Class: 570 Biowissenschaften; Biologie
Subject(s): Aspergillus nidulans
glucose signalling
glucose transporter
Journal Title: Scientific Reports
Publisher: Nature Publishing Group
Publisher Place: London
Volume: 7
Article Number: 45073
Publisher DOI: 10.1038/srep45073
Page Start: 1
Page End: 15
ISSN: 2045-2322
Appears in Collections:FG Angewandte und Molekulare Mikrobiologie » Publications

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