Z ring

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.

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?

Related terms

FtsZ:

A protein that polymerizes to form filaments and is essential for forming the Z ring.

Cytokinesis:

The process where a single cell divides its cytoplasm to form two daughter cells.

MinCDE system: A set of proteins that regulate the placement of the Z ring by inhibiting its formation at cell poles.