Yeast, specifically Saccharomyces cerevisiae, has been a powerful model organism for studying mitochondrial biology. Mitochondria, the cell's powerhouse, are central to energy production and various metabolic processes. Yeast research has significantly advanced our understanding of mitochondrial functions, including oxidative phosphorylation (OXPHOS) complex assembly, metabolite transport, lipid metabolism, and interorganelle communication. These studies have provided insights into the evolutionary conservation of mitochondrial processes and their roles in human diseases. OXPHOS complexes, crucial for ATP production, require precise assembly, which yeast genetics has helped elucidate. For example, Complex II (SDH) assembly involves several factors, some of which were identified using yeast models. Similarly, Complex V (ATP synthase) assembly has been studied in yeast, revealing key factors like Atp11 and Atp12, which are also involved in human mitochondrial diseases. Mitochondrial metabolite transport is vital for cellular metabolism, and yeast has been instrumental in identifying transporters such as the ADP/ATP carrier (Aac2) and the dicarboxylate carrier (DIC). These transporters are essential for maintaining metabolic homeostasis and have been linked to human diseases. The Mitochondrial Carrier Family (MCF) is crucial for transporting various molecules across the mitochondrial membrane. Yeast has been key in identifying and characterizing these carriers, including the ADP/ATP carrier and the dicarboxylate carrier, which are also important in mammals. Mitochondrial lipid metabolism, including the synthesis of cardiolipin (CL), has been extensively studied in yeast. CL is a unique phospholipid essential for mitochondrial function, and its synthesis involves several enzymes identified in yeast. Mutations in genes involved in CL synthesis can lead to diseases like Barth syndrome. Interorganelle communication, particularly between mitochondria and the ER, is critical for lipid metabolism and other cellular processes. Yeast has provided insights into the physical and functional interactions between mitochondria and other organelles, such as the vacuole, which plays a role in cellular metabolism and mitochondrial function. Yeast has also been crucial in understanding the relationship between mitochondria and the vacuole, revealing physical and functional associations that are important for cellular processes. The discovery of vCLAMP, a protein that mediates physical contact between the vacuole and mitochondria, highlights the importance of yeast in uncovering these interactions. Overall, yeast genetics and biochemistry have been instrumental in advancing our understanding of mitochondrial biology, providing insights into the mechanisms of mitochondrial function and their roles in human diseases. These studies continue to be vital for understanding the complex interplay of mitochondrial processes and their implications in health and disease.Yeast, specifically Saccharomyces cerevisiae, has been a powerful model organism for studying mitochondrial biology. Mitochondria, the cell's powerhouse, are central to energy production and various metabolic processes. Yeast research has significantly advanced our understanding of mitochondrial functions, including oxidative phosphorylation (OXPHOS) complex assembly, metabolite transport, lipid metabolism, and interorganelle communication. These studies have provided insights into the evolutionary conservation of mitochondrial processes and their roles in human diseases. OXPHOS complexes, crucial for ATP production, require precise assembly, which yeast genetics has helped elucidate. For example, Complex II (SDH) assembly involves several factors, some of which were identified using yeast models. Similarly, Complex V (ATP synthase) assembly has been studied in yeast, revealing key factors like Atp11 and Atp12, which are also involved in human mitochondrial diseases. Mitochondrial metabolite transport is vital for cellular metabolism, and yeast has been instrumental in identifying transporters such as the ADP/ATP carrier (Aac2) and the dicarboxylate carrier (DIC). These transporters are essential for maintaining metabolic homeostasis and have been linked to human diseases. The Mitochondrial Carrier Family (MCF) is crucial for transporting various molecules across the mitochondrial membrane. Yeast has been key in identifying and characterizing these carriers, including the ADP/ATP carrier and the dicarboxylate carrier, which are also important in mammals. Mitochondrial lipid metabolism, including the synthesis of cardiolipin (CL), has been extensively studied in yeast. CL is a unique phospholipid essential for mitochondrial function, and its synthesis involves several enzymes identified in yeast. Mutations in genes involved in CL synthesis can lead to diseases like Barth syndrome. Interorganelle communication, particularly between mitochondria and the ER, is critical for lipid metabolism and other cellular processes. Yeast has provided insights into the physical and functional interactions between mitochondria and other organelles, such as the vacuole, which plays a role in cellular metabolism and mitochondrial function. Yeast has also been crucial in understanding the relationship between mitochondria and the vacuole, revealing physical and functional associations that are important for cellular processes. The discovery of vCLAMP, a protein that mediates physical contact between the vacuole and mitochondria, highlights the importance of yeast in uncovering these interactions. Overall, yeast genetics and biochemistry have been instrumental in advancing our understanding of mitochondrial biology, providing insights into the mechanisms of mitochondrial function and their roles in human diseases. These studies continue to be vital for understanding the complex interplay of mitochondrial processes and their implications in health and disease.