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Z ring

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Microbiology

Definition

The Z ring is a protein structure composed mainly of FtsZ that forms at the future site of bacterial cell division. It plays a crucial role in cytokinesis by recruiting other proteins involved in cell wall synthesis and constriction.

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5 Must Know Facts For Your Next Test

  1. The Z ring is primarily composed of the protein FtsZ, which is homologous to tubulin in eukaryotic cells.
  2. Formation of the Z ring marks the beginning of bacterial cell division.
  3. FtsZ polymerizes to form a scaffold for other division proteins, enabling septum formation and cytokinesis.
  4. The location of the Z ring is regulated by several systems including MinCDE and nucleoid occlusion to ensure proper placement.
  5. Disruption in Z ring formation can inhibit bacterial cell division, making it a potential target for antibacterial drugs.

Review Questions

  • What protein primarily composes the Z ring?
  • How does the Z ring contribute to bacterial cell division?
  • Which regulatory systems are involved in positioning the Z ring?

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