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View/Edit Mouse. Dynamin-like 120 kDa protein, mitochondrial is a protein that in humans is encoded by the OPA1 gene. [5][6] This protein regulates mitochondrial fusion and cristae structure in the inner mitochondrial membrane (IMM) and contributes to ATP synthesis and apoptosis, [7][8][9] and small, round mitochondria. [10]
Mitochondrial fusion. Mitochondria are dynamic organelles with the ability to fuse and divide (fission), forming constantly changing tubular networks in most eukaryotic cells. These mitochondrial dynamics, first observed over a hundred years ago [1] are important for the health of the cell, and defects in dynamics lead to genetic disorders.
More specifically, MFN2 is a dynamin-like GTPase embedded in the outer mitochondrial membrane (OMM) which in turn affects mitochondrial dynamics, distribution, quality control, and function. In addition to the MFN2, OPA1 regulates inner mitochondrial membrane fusion, MFN1 is a mediator of mitochondrial fusion and DRP1 is responsible for ...
On the other hand, the process of fusion is directed by different membrane-anchored dynamin proteins at different levels of the mitochondria. [13] Fusion at the level of the outer mitochondrial membrane is mediated by Mfn1 and Mfn2 (Mitofusins 1 and 2), [15] and fusion at the level of the inner mitochondrial membrane is mediated by Opa1.
Mitophagy is the selective degradation of mitochondria by autophagy. It often occurs to defective mitochondria following damage or stress. The process of mitophagy was first described in 1915 by Margaret Reed Lewis and Warren Harmon Lewis. [1] Ashford and Porter used electron microscopy to observe mitochondrial fragments in liver lysosomes by ...
Mitochondrial dynamics, the balance between mitochondrial fusion and fission, is an important factor in pathologies associated with several disease conditions. [166] The hypothesis of mitochondrial binary fission has relied on the visualization by fluorescence microscopy and conventional transmission electron microscopy (TEM). The resolution of ...
Human mitochondrial genetics is the study of the genetics of human mitochondrial DNA (the DNA contained in human mitochondria). The human mitochondrial genome is the entirety of hereditary information contained in human mitochondria. Mitochondria are small structures in cells that generate energy for the cell to use, and are hence referred to ...
Amitosis, also known as karyostenosis, direct cell division, or binary fission, is a mode of asexual cell division primarily observed in prokaryotes. This process is distinct from other cell division mechanisms such as mitosis and meiosis, mainly because it bypasses the complexities associated with the mitotic apparatus, such as spindle formation.