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Related Concept Videos

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Archaeal viruses play a crucial role in the ecosystems of extremophilic archaea, particularly those belonging to the phyla Euryarchaeota and Crenarchaeota. By shaping host evolution and facilitating gene transfer, these viruses influence microbial communities and contribute to genetic diversity in extreme environments. The archaea they infect thrive in acidic hot springs and hydrothermal vents characterized by high temperatures and low pH. Archaeal viruses exhibit remarkable structural...
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Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
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Archaeal cell walls are structurally and compositionally distinct from their bacterial counterparts, lacking the characteristic peptidoglycan layer found in most bacteria. Instead, archaeal cell walls exhibit remarkable diversity, utilizing materials such as pseudomurein, polysaccharides, and proteins to construct their protective outer layers. This structural flexibility is closely tied to archaea's ecological adaptability.S-Layers: The Common Archaeal Cell WallThe S-layer is the most...
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Vesicle budding is orchestrated by distinct cytosolic proteins such as adaptor proteins, coat proteins, and GTPases. To initiate vesicle budding, membrane-bending proteins containing crescent-shaped BAR domains bind to the lipid heads in the bilayer and distort the membrane to form a protein-coated vesicle bud. Adaptors proteins such as AP2 for clathrin-coated vesicles can nucleate on the deformed membrane. Finally, coat proteins such as clathrin or COPI and COPII assemble into a coat forming...
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Examining Proteasome Assembly with Recombinant Archaeal Proteasomes and Nondenaturing PAGE: The Case for a Combined Approach
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The archaeal division protein CdvB1 assembles into polymers that are depolymerized by CdvC.

Alberto Blanch Jover1, Nicola De Franceschi1, Daphna Fenel2

  • 1Department of Bionanoscience, Kavli Institute of Nanoscience Delft, Delft University of Technology, The Netherlands.

FEBS Letters
|March 3, 2022
PubMed
Summary
This summary is machine-generated.

The CdvB1 protein forms filaments crucial for archaeal cell division. These filaments are disassembled by CdvC, revealing key mechanisms in Crenarchaea cell constriction.

Keywords:
ArchaeaCdv systemCdvB1ESCRT-IIIcell division

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Area of Science:

  • Microbiology
  • Molecular Biology
  • Biochemistry

Background:

  • The cell division machinery in Crenarchaea, known as Cdv proteins, shares similarities with the eukaryotic ESCRT system.
  • CdvB1 is a key protein implicated in the constricting ring responsible for cell division in Crenarchaea.

Purpose of the Study:

  • To investigate the in vitro behavior of Metallosphaera sedula CdvB1.
  • To elucidate the role of CdvB1 in filament formation and membrane interaction during archaeal cell division.

Main Methods:

  • Transmission Electron Microscopy (TEM) imaging.
  • Biochemical assays to study protein-protein and protein-membrane interactions.

Main Results:

  • CdvB1 self-assembles into filaments.
  • The Vps4-homolog ATPase CdvC depolymerizes CdvB1 filaments.
  • CdvB1 binds to negatively charged lipid membranes.
  • CdvC detaches CdvB1 from membranes.

Conclusions:

  • CdvB1 forms dynamic filaments essential for archaeal cell division.
  • CdvC acts as a regulator, depolymerizing filaments and detaching them from membranes.
  • These findings offer new insights into the archaeal cell division machinery.