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NuMA after 30 years: the matrix revisited
Andreea E Radulescu1, Don W Cleveland
1Ludwig Institute for Cancer Research, Department of Cellular and Molecular Medicine, University of California at San Diego, La Jolla, CA 92093-6070, USA.
Trends in Cell Biology
|February 9, 2010
Summary
The nuclear mitotic apparatus (NuMA) protein is crucial for cell division and development. Its role in interphase nuclei, potentially as part of a nuclear scaffold, is still under investigation.
Area of Science:
- Cell Biology
- Molecular Biology
- Developmental Biology
Background:
- The large nuclear mitotic apparatus (NuMA) protein is a key component of interphase nuclei.
- NuMA is essential for mitotic spindle assembly and maintenance, tethering microtubules to spindle poles with cytoplasmic dynein.
- NuMA homologs mediate cell cortex tethering, crucial for asymmetric cell divisions in development.
Purpose of the Study:
- To investigate the established and potential roles of the NuMA protein.
- To explore the function of NuMA beyond its known role in mitosis and cell division.
- To determine the interphase function of NuMA, particularly its potential role in nuclear structure.
Main Methods:
- The study focuses on the known functions and structural properties of NuMA.
- It reviews existing literature on NuMA's interactions with microtubules and cytoplasmic dynein.
- The abstract implies a focus on structural analysis and functional inference based on known properties.
Main Results:
- NuMA is an abundant nuclear protein and essential for mitotic spindle organization.
- NuMA facilitates microtubule tethering to spindle poles and the cell cortex.
- NuMA persists in interphase nuclei of differentiated cells, suggesting an undiscovered role.
Conclusions:
- NuMA's persistent presence in interphase nuclei suggests a role beyond mitosis.
- Its structural characteristics suggest NuMA may function as a component of a nuclear scaffold.
- Further research is needed to establish the precise interphase function of NuMA within the nuclear matrix.
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