Publications by authors named "D Landsman"

The Clusters of Orthologous Genes (COG) database, originally created in 1997, has been updated to reflect the constantly growing collection of completely sequenced prokaryotic genomes. This update increased the genome coverage from 1309 to 2296 species, including 2103 bacteria and 193 archaea, in most cases, with a single representative genome per genus. This set covers all genera of bacteria and archaea that included organisms with 'complete genomes' as per NCBI databases in November 2023.

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Article Synopsis
  • FOXA1 and GATA4 are key pioneer factors that kickstart liver cell development by attaching to the N1 nucleosome in the ALB1 gene enhancer.
  • Cryo-electron microscopy was used to analyze the structures of the N1 nucleosome and its interactions with FOXA1 and GATA4, revealing how they bind to different parts of the nucleosome and work together.
  • The study indicates that FOXA1 enhances GATA4's ability to bind by repositioning the nucleosome, which helps regulate liver cell function-related genes by making the chromatin more accessible.
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Introduction: Multiple sclerosis (MS) is an immune-mediated central nervous system disorder and a growing global health challenge affecting nearly 3 million people worldwide. Incidence and prevalence continue to increase with no known cause or cure. Globally governments and non-profit organizations fund research toward better understanding of and treatments for multiple sclerosis.

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Wrapping of DNA into nucleosomes restricts accessibility to DNA and may affect the recognition of binding motifs by transcription factors. A certain class of transcription factors, the pioneer transcription factors, can specifically recognize their DNA binding sites on nucleosomes, initiate local chromatin opening, and facilitate the binding of co-factors in a cell-type-specific manner. For the majority of human pioneer transcription factors, the locations of their binding sites, mechanisms of binding, and regulation remain unknown.

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The cost and complexity of generating a complete reference genome means that many organisms lack an annotated reference. An alternative is to use a de novo reference transcriptome. This technology is cost-effective but is susceptible to off-target RNA contamination.

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