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Replication in Eukaryotes02:31

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In eukaryotic cells, DNA replication is highly conserved and tightly regulated. Multiple linear chromosomes must be duplicated with high fidelity before cell division, so there are many proteins that fulfill specialized roles in the replication process. Replication occurs in three phases: initiation, elongation, and termination, and ends with two complete sets of chromosomes in the nucleus.
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The eukaryotic promoter region is a segment of DNA located upstream of a gene. It contains an RNA polymerase binding site, a transcription start site, and several cis-regulatory sequences.  The proximal promoter region is located in the vicinity of the gene and has cis-regulatory sequences and the core promoter. The core promoter is the binding site for RNA polymerase and is usually located between -35 and +35 nucleotides from the transcription start site. The distal promoter regions are...
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The “tree of life” describes the evolution of life and the evolutionary relationships between organisms. The root of the tree is the common ancestor to all life on Earth. All other species radiate from this point, much like the branches of a tree. The numerous tips of these branches on the tree of life represent every living, or extant, species. Extinct species, which are species that no longer exist, can be found towards the center of the tree. Currently, these organisms, both...
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Microbial Eukaryotes: a Missing Link in Gut Microbiome Studies.

Isabelle Laforest-Lapointe1,2, Marie-Claire Arrieta1,2

  • 1Department of Physiology and Pharmacology, University of Calgary, Calgary, Alberta, Canada.

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|March 21, 2018
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Summary
This summary is machine-generated.

Eukaryote microbes are fundamental to the human gut microbiome, playing key ecological roles. Future studies must explore their interactions with bacteria and the host for a complete understanding.

Keywords:
Blastocystisbacteriaeukaryotesfungigut microbiomeimmune systeminterkingdom interactionsmicrobial ecologyprokaryotesprotozoan

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Area of Science:

  • Microbiology
  • Human Microbiome Research
  • Eukaryotic Ecology

Background:

  • Human-associated microbial communities comprise prokaryotes and eukaryotes.
  • Most research focuses on bacteria, neglecting the role of eukaryotic microbes in the gut.
  • Emerging evidence highlights the significant ecological functions of gut eukaryotes.

Purpose of the Study:

  • To discuss new evidence on the fundamental role of eukaryotes in the human gut microbiome.
  • To emphasize the need for comprehensive studies on microeukaryotes and their interactions.

Main Methods:

  • Review of recent studies on human gut eukaryotic microbes.
  • Analysis of ecological roles and host health implications.
  • Perspective on future research directions.

Main Results:

  • Eukaryotic microbes are increasingly recognized as essential components of the gut microbiome.
  • These eukaryotes exert important ecological influences within the gut environment.
  • Their roles extend to impacting host health.

Conclusions:

  • Eukaryotes are fundamental species in the human gut ecosystem.
  • Future microbiome research must integrate the study of microeukaryotes.
  • Understanding multitrophic interactions between microeukaryotes, other microbes, and the host is crucial.