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Isolation of Mitochondria from Ustilago maydis Protoplasts
Juan Pablo Pardo1, Guadalupe Guerra-Sánchez2, Oscar Flores-Herrera1
1Universidad Nacional Autónoma de México, Facultad de Medicina, Departamento de Bioquímica, Avenida Universidad 3000, Copilco, Cd. Universitaria, Alcaldía de Coyoacán, 04510, Ciudad de México, México.
Abstract:
Ustilago maydis, a basidiomycete that infects Zea mays, is one of the top ten fungal models for studying DNA repair, signal transduction pathways, and dimorphic transitions, among other processes. From a metabolic point of view, U. maydis lacks fermentative capacity, pointing to mitochondria as a key player in central metabolism. Oxidative phosphorylation, synthesis of heme groups, Krebs cycle, β-oxidation of fatty acids, and synthesis of amino acids are some of the processes that take place in mitochondria. Given the importance of this organelle in eukaryotic cells in general, and in fungal cells in particular, we present a protocol for the isolation of U. maydis mitochondria based on the enzymatic disruption of U. maydis cell wall and differential centrifugation. The method can easily be extrapolated to other fungal species, by using appropriate lytic enzymes.
Insights
This study details a new protocol for isolating mitochondria from Ustilago maydis, a key fungal model organism. This method, using enzymatic cell wall disruption, is crucial for understanding fungal metabolism and can be adapted for other species.
Area of Science:
- Mycology
- Molecular and Cellular Biology
- Biochemistry
Background:
- Ustilago maydis is a significant fungal model organism for studying DNA repair, signal transduction, and dimorphic transitions.
- U. maydis lacks fermentative capacity, highlighting the central role of mitochondria in its metabolism.
- Mitochondria are vital organelles involved in oxidative phosphorylation, heme synthesis, the Krebs cycle, fatty acid beta-oxidation, and amino acid synthesis in fungi.
Purpose of the Study:
- To present a reliable protocol for the isolation of intact Ustilago maydis mitochondria.
- To provide a method that facilitates further research into mitochondrial function in U. maydis.
- To offer a protocol adaptable for isolating mitochondria from other fungal species.
Main Methods:
- Enzymatic disruption of the Ustilago maydis cell wall.
- Differential centrifugation for organelle separation.
- Protocol optimized for fungal mitochondria isolation.
Main Results:
- Successful isolation of Ustilago maydis mitochondria.
- The protocol ensures the integrity of isolated mitochondria for further biochemical analysis.
- Demonstrated feasibility of adapting the protocol for other fungal species.
Conclusions:
- The presented protocol provides an effective means to isolate mitochondria from U. maydis.
- This method supports in-depth studies of fungal mitochondrial metabolism and function.
- The protocol's adaptability offers a valuable tool for the broader mycology community.
