LaeA regulates mycelium growth by mediating H3K9 methylation in Myceliophthora thermophila [RNA-seq]
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PROVIDER: PRJNA881384 | ENA |
REPOSITORIES: ENA
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Project description:The low efficiency of fungal growth and substrate utilization is a barrier to high yield and productivity of target products during fungal fermentation. However, elaborated and intricate regulatory mechanisms of fungal growth remains inconclusive. In this study, we found deletion of putative methyltransferase LaeA enhanced sugar consumption and fungal growth rate of M. thermophila. The exploration of the mechanism of LaeA regulation revealed that transcription factor (Cre-1, Grf-1, Grf-2 and Grf-3) acted as negative repressor of intracellular metabolism, of which expression was indirectly regulated by LaeA. Moreover, higher gluconeogenesis activity is crucial for elevated fugal growth rate and PCK might be the core notes of metabolism network relative to fungal vegetative growth. Further in vivo global histone methylation assay and in vitro biochemical analysis declared LaeA was a methyltransferase with histone H3 lysine 9 (H3K9) as the substrate and regulated growth properties by directly modulating H3K9 methylation levels. ChIP-seq analysis displayed significantly reduced H3K9me3 in region of pck locus in strain ΔlaeA, implying methylation modification of pck might be the way of LaeA regulating growth phenotypes. Additionally, whole-genome bisulfite sequencing (WGBS) analysis demonstrated methylation of cytosines (5mC) in genomic DNA was carried out and correlated to the methylation of H3K9 modified by LaeA. Taken together, our research declared LaeA possessed methyltransferase activity, targeting H3K9 and participated in regulation of fugal properties, including on sugar consumption, mycelium growth, cellulase production, secondary metabolism, and oxidative stress tolerance, providing new insights into the epigenetics of filamentous fungi.
2023-04-12 | GSE213575 | GEO
Project description:The low efficiency of fungal growth and substrate utilization is a barrier to high yield and productivity of target products during fungal fermentation. However, elaborated and intricate regulatory mechanisms of fungal growth remains inconclusive. In this study, we found deletion of putative methyltransferase LaeA enhanced sugar consumption and fungal growth rate of M. thermophila. The exploration of the mechanism of LaeA regulation revealed that transcription factor (Cre-1, Grf-1, Grf-2 and Grf-3) acted as negative repressor of intracellular metabolism, of which expression was indirectly regulated by LaeA. Moreover, higher gluconeogenesis activity is crucial for elevated fugal growth rate and PCK might be the core notes of metabolism network relative to fungal vegetative growth. Further in vivo global histone methylation assay and in vitro biochemical analysis declared LaeA was a methyltransferase with histone H3 lysine 9 (H3K9) as the substrate and regulated growth properties by directly modulating H3K9 methylation levels. ChIP-seq analysis displayed significantly reduced H3K9me3 in region of pck locus in strain ΔlaeA, implying methylation modification of pck might be the way of LaeA regulating growth phenotypes. Additionally, whole-genome bisulfite sequencing (WGBS) analysis demonstrated methylation of cytosines (5mC) in genomic DNA was carried out and correlated to the methylation of H3K9 modified by LaeA. Taken together, our research declared LaeA possessed methyltransferase activity, targeting H3K9 and participated in regulation of fugal properties, including on sugar consumption, mycelium growth, cellulase production, secondary metabolism, and oxidative stress tolerance, providing new insights into the epigenetics of filamentous fungi.
2023-04-12 | GSE213573 | GEO
Project description:The low efficiency of fungal growth and substrate utilization is a barrier to high yield and productivity of target products during fungal fermentation. However, elaborated and intricate regulatory mechanisms of fungal growth remains inconclusive. In this study, we found deletion of putative methyltransferase LaeA enhanced sugar consumption and fungal growth rate of M. thermophila. The exploration of the mechanism of LaeA regulation revealed that transcription factor (Cre-1, Grf-1, Grf-2 and Grf-3) acted as negative repressor of intracellular metabolism, of which expression was indirectly regulated by LaeA. Moreover, higher gluconeogenesis activity is crucial for elevated fugal growth rate and PCK might be the core notes of metabolism network relative to fungal vegetative growth. Further in vivo global histone methylation assay and in vitro biochemical analysis declared LaeA was a methyltransferase with histone H3 lysine 9 (H3K9) as the substrate and regulated growth properties by directly modulating H3K9 methylation levels. ChIP-seq analysis displayed significantly reduced H3K9me3 in region of pck locus in strain ΔlaeA, implying methylation modification of pck might be the way of LaeA regulating growth phenotypes. Additionally, whole-genome bisulfite sequencing (WGBS) analysis demonstrated methylation of cytosines (5mC) in genomic DNA was carried out and correlated to the methylation of H3K9 modified by LaeA. Taken together, our research declared LaeA possessed methyltransferase activity, targeting H3K9 and participated in regulation of fugal properties, including on sugar consumption, mycelium growth, cellulase production, secondary metabolism, and oxidative stress tolerance, providing new insights into the epigenetics of filamentous fungi.
2023-04-12 | GSE213570 | GEO
Project description:LaeA regulates mycelium growth by mediating H3K9 methylation in Myceliophthora thermophila
| PRJNA881388 | ENA
Project description:LaeA regulates mycelium growth by mediating H3K9 methylation in Myceliophthora thermophila [WGBS]
| PRJNA881389 | ENA
Project description:LaeA regulates mycelium growth by mediating H3K9 methylation in Myceliophthora thermophila [ChIP-seq]
| PRJNA881385 | ENA
Project description:This SuperSeries is composed of the SubSeries listed below.
2023-04-12 | GSE213576 | GEO
Project description:The thermophilic filamentous fungi Myceliophthora thermophila (Sporotrichum thermophile) has an ability to decompose cellulolytic biomass. To identify the genes and proteins involved in this process, we explored the transcriptomes of M. thermophila grown at 45 °C on different agricultural straws (oat, triticale, canola, flax straws).
2016-11-28 | GSE57235 | GEO
Project description:BackgroundFilamentous fungi with the ability to use complex carbon sources has been developed as platforms for biochemicals production. Myceliophthora thermophila has been developed as the cell factory to produce lignocellulolytic enzymes and plant biomass-based biofuels and biochemicals in biorefinery. However, low fungal growth rate and cellulose utilization efficiency are significant barriers to the satisfactory yield and productivity of target products, which needs our further exploration and improvement.ResultsIn this study, we comprehensively explored the roles of the putative methyltransferase LaeA in regulating mycelium growth, sugar consumption, and cellulases expression. Deletion of laeA in thermophile fungus Myceliophthora thermophila enhanced mycelium growth and glucose consumption significantly. Further exploration of LaeA regulatory network indicated that multiple growth regulatory factors (GRF) Cre-1, Grf-1, Grf-2, and Grf-3, which act as negative repressors of carbon metabolism, were regulated by LaeA in this fungus. We also determined that phosphoenolpyruvate carboxykinase (PCK) is the core node of the metabolic network related to fungal vegetative growth, of which enhancement partially contributed to the elevated sugar consumption and fungal growth of mutant ΔlaeA. Noteworthily, LaeA participated in regulating the expression of cellulase genes and their transcription regulator. ΔlaeA exhibited 30.6% and 5.5% increases in the peak values of extracellular protein and endo-glucanase activity, respectively, as compared to the WT strain. Furthermore, the global histone methylation assays indicated that LaeA is associated with modulating H3K9 methylation levels. The normal function of LaeA on regulating fungal physiology is dependent on methyltransferase activity.ConclusionsThe research presented in this study clarified the function and elucidated the regulatory network of LaeA in the regulation of fungal growth and cellulase production, which will significantly deepen our understanding about the regulation mechanism of LaeA in filamentous fungi and provides the new strategy for improvement the fermentation properties of industrial fungal strain by metabolic engineering.
| S-EPMC10071736 | biostudies-literature
Project description:The aim of this study is to investigate the role of the transcription factor Xyr1 in the regulation of cellulolytic and xylanolytic genes of the filamantous fungus Myceliophthora thermophila
2019-09-12 | GSE137286 | GEO