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ESCRTs got your Bac!

Raunaq A Deo1, William A Prinz1

  • 1National Institute of Diabetes and Digestive and Kidney Diseases, NIH, Bethesda, MD 20892, USA.

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Summary
This summary is machine-generated.

The ESCRT-III protein machinery, known for membrane remodeling, is now found in bacteria and cyanobacteria. This discovery reveals the ESCRT-III superfamily is more ancient and widespread than previously understood.

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Area of Science:

  • Cell biology
  • Molecular biology
  • Microbiology

Background:

  • ESCRT-III proteins are essential for membrane deformation, budding, and severing in eukaryotes and some archaea.
  • These proteins assemble into filaments to perform their functions.

Purpose of the Study:

  • To investigate the presence and function of ESCRT-III homologs in bacteria and cyanobacteria.
  • To determine if the ESCRT-III superfamily extends beyond eukaryotes and archaea.

Main Methods:

  • Comparative genomics and sequence analysis to identify potential ESCRT-III homologs in bacterial and cyanobacterial genomes.
  • Biochemical and cell-based assays to characterize the function of identified proteins, such as PspA and Vipp1.

Main Results:

  • PspA in bacteria and Vipp1 in cyanobacteria were identified as functional homologs of ESCRT-III proteins.
  • These findings demonstrate that the ESCRT-III machinery is conserved across bacteria, cyanobacteria, archaea, and eukaryotes.

Conclusions:

  • The ESCRT-III superfamily is a fundamental and ancient cellular system with a broader evolutionary history than previously recognized.
  • The presence of ESCRT-III components in bacteria and cyanobacteria suggests ancient roles in membrane dynamics crucial for prokaryotic life.