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Septum formation in Aspergillus nidulans.
1Plant Science Initiative, N234 Beadle Center, University of Nebraska, Lincoln, NE 68588-0660, USA. sharri1@unlnotes.unl.edu
Current Opinion in Microbiology
|December 4, 2001
Summary
Filamentous fungi form septa via a dynamic septal band. This review discusses the assembly and regulation of this fungal cell structure, crucial for hyphal growth.
Area of Science:
- Cell biology
- Mycology
- Biochemistry
Background:
- Filamentous fungi grow as multicellular hyphae separated by septa.
- Septum formation in *A. nidulans* involves a dynamic septal band assembled post-mitosis.
- This band comprises actin, septins, and formins, and its assembly is regulated by conserved protein kinase cascades.
Purpose of the Study:
- To review the dynamics and regulation of septal band assembly in filamentous fungi.
- To explore the role of conserved protein kinase cascades in fungal septation.
- To discuss potential regulation by cyclin-dependent kinase activity in hyphal differentiation.
Main Methods:
- Review of existing literature on fungal septation.
- Analysis of molecular components of the septal band (actin, septins, formins).
- Discussion of regulatory pathways, including protein kinase cascades and cyclin-dependent kinases.
Main Results:
- The septal band is a dynamic structure essential for septum formation in *A. nidulans*.
- Assembly of the septal band is dependent on a conserved protein kinase cascade.
- Hyphal differentiation may involve regulation of this cascade by cyclin-dependent kinase activity.
Conclusions:
- Understanding the dynamics and regulation of the septal band is key to comprehending fungal multicellularity.
- Conserved pathways highlight similarities between fungal and yeast septation.
- Further research into cyclin-dependent kinase regulation could reveal mechanisms of hyphal differentiation.