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An examination of the quinic acid utilization genes in Aspergillus niger reveals the involvement of two pH-dependent permeases

Author(s): Sgro M; Reid ID; Arentshorst M; Ram AFJ; Tsang A;

Many microorganisms are able to use plant-derived aromatic and cyclic compounds like the common plant secondary metabolite quinic acid as carbon and energy sources. In fungi, three enzymatic steps convert quinic acid into the common intermediate protocatechuic acid, which is then further converted into TCA cycle intermediates. The genes encoding these thr ...

Article GUID: 40853219


Global survey of secondary metabolism in em Aspergillus niger /em via activation of specific transcription factors

Author(s): Semper C; Pham TTM; Ram S; Palys S; Evdokias G; Ouedraogo JP; Moisan MC; Geoffrion N; Reid I; Di Falco M; Bailey Z; Tsang A; Benoit-Gelber I; Savchenko A;

Genomics analysis confirmed the status of filamentous fungi as a rich source of novel secondary metabolites; however, the discovery of these compounds is hampered by the cryptic nature of their biosynthetic pathways under laboratory conditions. Consequently, despite substantial research effort ov ...

Article GUID: 40852424


Fortifying the Rasamsonia emersonii secretome with recombinant cellobiohydrolase (GH7) for efficient biomass saccharification

Author(s): Raheja Y; Singh V; Gaur VK; Sharma G; Tsang A; Chadha BS;

GH7 cellobiohydrolases (CBH1s) are essential for depolymerizing crystalline cellulose, yet the hypercellulolytic thermophile Rasamsonia emersonii secretes them only in low amounts, leaving a gap in its native enzyme cocktail. To see whether a cognate CBH1 could fill this gap and how it stacks up against the industrial workhorse strain Trichoderma reesei C ...

Article GUID: 40622460


Heterologous Expression of Thermostable Endoglucanases from Rasamsonia emersonii: A Paradigm Shift in Biomass Hydrolysis

Author(s): Raheja Y; Singh V; Gaur VK; Tsang A; Chadha BS;

In this study, two thermostable endoglucanases (Rem_GH5EG and Rem_GH7EG) from Rasamsonia emersonii were heterologously expressed in Pichia pastoris and characterized to evaluate their potential for industrial biomass saccharification. Rem_GH5EG demonstrated markedly superior catalytic efficiency toward barley ß-glucan (kcat/Km = 6.3 × 10-3/mg mL/min), whi ...

Article GUID: 40418313


Retraction notice to "Thermostable xylanases from thermophilic fungi and bacteria: Current perspective" [Bioresour. Technol. 277 (2019) 195-203]

Author(s): Chadha BS; Kaur B; Basotra N; Tsang A; Pandey A;

No abstract available

Article GUID: 39447502


Transcriptomics identify the triggering of citrate export as the key event caused by manganese deficiency in Aspergillus niger

Author(s): Fekete E; Bíró V; Márton A; Bakondi-Kovács I; Sándor E; Kovács B; Geoffrion N; Tsang A; Kubicek CP; Karaffa L;

For over a century, the filamentous Ascomycete fungus Aspergillus niger has played a pivotal role in the industrial production of citric acid. A critical fermentation parameter that sustains high-yield citric acid accumulation is the suboptimal concentration of manganese(II) ions in the culture b ...

Article GUID: 39377610


Comparative genomic analysis of thermophilic fungi reveals convergent evolutionary adaptations and gene losses

Author(s): Steindorff AS; Aguilar-Pontes MV; Robinson AJ; Andreopoulos B; LaButti K; Kuo A; Mondo S; Riley R; Otillar R; Haridas S; Lipzen A; Grimwood J; Schmutz J; Clum A; Reid ID; Moisan MC; Butler G; Nguyen TTM; Dewar K; Conant G; Drula E; Henri ...

Thermophily is a trait scattered across the fungal tree of life, with its highest prevalence within three fungal families (Chaetomiaceae, Thermoascaceae, and Trichocomaceae), as well as some members of the phylum Mucoromycota. We examined 37 thermophilic and thermotolerant species and 42 mesophil ...

Article GUID: 39266695


Developing endophytic Penicillium oxalicum as a source of lignocellulolytic enzymes for enhanced hydrolysis of biorefinery relevant pretreated rice straw

Author(s): Sharma G; Kaur B; Raheja Y; Kaur A; Singh V; Basotra N; Di Falco M; Tsang A; Chadha BS;

Endophytic fungi, as plant symbionts, produce an elaborate array of enzymes for efficient disintegration of lignocellulosic biomass into constituent monomeric sugars, making them novel source of lignocellulolytic CAZymes with immense potential in future biorefineries. The present study reports lignocellulolytic enzymes production potential of an endophyti ...

Article GUID: 39249151


Transcriptional and secretome analysis of Rasamsonia emersonii lytic polysaccharide mono-oxygenases

Author(s): Raheja Y; Singh V; Kumar N; Agrawal D; Sharma G; Di Falco M; Tsang A; Chadha BS;

The current study is the first to describe the temporal and differential transcriptional expression of two lytic polysaccharide monooxygenase (LPMO) genes of Rasamsonia emersonii in response to various carbon sources. The mass spectrometry based secretome analysis of carbohydrate active enzymes (CAZymes) expression in response to different carbon sources ...

Article GUID: 39167166


Expansion of Auxiliary Activity Family 5 sequence space via biochemical characterization of six new copper radical oxidases

Author(s): Fong JK; Mathieu Y; Vo MT; Bellemare A; Tsang A; Brumer H;

Bacterial and fungal copper radical oxidases (CROs) from Auxiliary Activity Family 5 (AA5) are implicated in morphogenesis and pathogenesis. The unique catalytic properties of CROs also make these enzymes attractive biocatalysts for the transformation of small molecules and biopolymers. Despite a recent increase in the number of characterized AA5 members, ...

Article GUID: 38953370


Genome and secretome insights: unravelling the lignocellulolytic potential of Myceliophthora verrucosa for enhanced hydrolysis of lignocellulosic biomass

Author(s): Sharma G; Kaur B; Singh V; Raheja Y; Falco MD; Tsang A; Chadha BS;

Lignocellulolytic enzymes from a novel Myceliophthora verrucosa (5DR) strain was found to potentiate the efficacy of benchmark cellulase during saccharification of acid/alkali treated bagasse by ~ 2.24 fold, indicating it to be an important source of auxiliary enzymes. The De-novo sequencing and analysis of M. verrucosa genome (31.7 Mb) revealed to encode ...

Article GUID: 38676717


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