Publications by authors named "Joyshree Ganguly"

is a thermophilic bacterium capable of producing succinate from lignocellulosic-derived sugars and has the potential to be exploited as a platform organism. However, exploitation of has been limited partly due to the genetic inaccessibility and lack of genome engineering tools. In this study, we established the genetic accessibility for DSM 5809.

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Single-cell analysis of microbial population heterogeneity is a fast growing research area in microbiology due to its potential to identify and quantify the impact of subpopulations on microbial performance in, for example, industrial biotechnology, environmental biology, and pathogenesis. Although several tools have been developed, determination of population heterogenity in anaerobic bacteria, especially spore-forming clostridia species has been amply studied. In this study we applied single cell analysis techniques such as flow cytometry (FCM) and fluorescence-assisted cell sorting (FACS) on the spore-forming succinate producer Pseudoclostridium thermosuccinogenes.

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Article Synopsis
  • Hungateiclostridium thermocellum DSM 1313 is a promising biocatalyst for producing ethanol from renewable lignocellulosic materials, but progress has been limited due to a lack of effective genome engineering tools.
  • A new thermophilic CRISPR-Cas9 system, called ThermoCas9, has been developed, allowing for the repression of key metabolic genes, specifically lactate dehydrogenase (ldh) and phosphotransacetylase (pta) in H. thermocellum.
  • The study demonstrated that using CRISPR interference (CRISPRi) can significantly reduce the expression of these genes, leading to notable decreases in byproduct formation (24% less lactate and
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High engineering efficiencies are required for industrial strain development. Due to its user-friendliness and its stringency, CRISPR-Cas-based technologies have strongly increased genome engineering efficiencies in bacteria. This has enabled more rapid metabolic engineering of both the model host Escherichia coli and non-model organisms like Clostridia, Bacilli, Streptomycetes and cyanobacteria, opening new possibilities to use these organisms as improved cell factories.

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