Related Experiment Video
Updated: Apr 28, 2026
08:02
Synchronization of Caulobacter Crescentus for Investigation of the Bacterial Cell Cycle
Published on: April 8, 2015
11.8K
MipZ, a spatial regulator coordinating chromosome segregation with cell division in Caulobacter
Martin Thanbichler1, Lucy Shapiro
1Department of Developmental Biology, Stanford University School of Medicine, Beckman Center B300, 279 Campus Drive, Stanford, CA 94305, USA.
Cell
|July 15, 2006
Summary
A new protein, MipZ, coordinates cell division in Caulobacter by ensuring duplicated DNA origins move to opposite poles. MipZ then guides the FtsZ ring formation to the cell center for proper cell division.
Area of Science:
- Microbiology
- Cell Biology
- Molecular Biology
Background:
- Accurate cell division requires precise placement of the division plane.
- This ensures daughter cells receive a complete set of chromosomes.
Purpose of the Study:
- To elucidate the mechanism coordinating the FtsZ cytokinetic ring assembly and placement with the bipolar localization of duplicated chromosomal origins in Caulobacter.
- To identify the key proteins involved in this coordination.
Main Methods:
- Investigated the role of MipZ in Caulobacter cell division.
- Utilized microscopy and genetic techniques to observe protein localization and cellular processes.
- Examined the interaction between MipZ, ParB, and FtsZ.
Main Results:
- Identified MipZ as an essential protein coordinating chromosome segregation and cell division.
- Demonstrated that MipZ localizes duplicated origins to cell poles.
- Showed MipZ inhibits FtsZ polymerization, restricting ring formation to midcell.
Conclusions:
- MipZ is crucial for positioning the FtsZ ring and ensuring timely cell division after chromosome segregation.
- MipZ's localization dictates the division plane, ensuring genetic stability.
Related Concept Videos
01:29Cytoskeletal Proteins in Bacteria
3.4K
Bacterial cells were initially considered simple, randomly organized structures lacking a cytoskeleton. However, the discovery of cytoskeleton homologs in bacteria led to the change of this opinion. Bacterial cytoskeletal filaments regulate the cell shape, cell polarity, cell division, and partitioning of plasmids during cell division. It was later discovered that bacterial cytoskeletal proteins, mainly actin and tubulin homologs, are diverse compared to their eukaryotic counterparts. On the...
3.4K
02:20Cohesins
4.5K
Cohesin protein complexes are a molecular glue that holds two sister chromatids together. They play an important role both in mitosis and meiosis. In mitosis, all cohesin complexes present on the chromosomes are removed before the start of the anaphase stage.
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of...
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of...
4.5K
02:17Separation of Sister Chromatids
3.6K
At the transition from prophase to metaphase, there is a reduction in cohesion along the chromosomal arms, resulting in the resolution of sister chromatids. However, residual cohesin connections remain to hold the sister chromatids together until the transition from metaphase to anaphase. The residual connection prevents any premature separation of sister chromatids, blocking the risks of aneuploidy within the daughter cells.
At the onset of anaphase, separase, a proteolytic enzyme, is...
At the onset of anaphase, separase, a proteolytic enzyme, is...
3.6K
02:19The Spindle Assembly Checkpoint
2.9K
The spindle assembly checkpoint is a molecular surveillance mechanism ensuring the fidelity of chromosome segregation during anaphase. The checkpoint monitors the completion of all the prerequisite steps before chromosome segregation to determine whether the segregation process should proceed or be delayed.
Many proteins function together to control the spindle assembly checkpoint. Mutations affecting these proteins may allow cells to proceed into anaphase prematurely, resulting in the...
Many proteins function together to control the spindle assembly checkpoint. Mutations affecting these proteins may allow cells to proceed into anaphase prematurely, resulting in the...
2.9K
02:13Determining the Plane of Cell Division
2.7K
Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is essential for determining the size of the two daughter cells. The cell division plane is perpendicular to the plane of chromosome segregation, but different types of organisms have different cell division mechanisms to suit their morphology and function.
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division...
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division...
2.7K
02:02Meiosis II
32.6K
Meiosis II entails cell division and segregation of the sister chromatids, resulting in the production of four unique haploid gametes. The steps for meiosis II are similar to mitosis, except that meiosis II occurs in haploid cells, whereas mitosis occurs in diploid cells.
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
The timing and cell division patterns of meiosis differ between males and females. In male meiosis, the centrosomes are part of the formation of the meiotic spindle. However, in oocytes, including that of humans, Drosophila,...
32.6K