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Is Drp1 a GTPase?

Drp1 is a dynamin-like GTPase that mediates mitochondrial and peroxisomal division in a process dependent on self-assembly and coupled to GTP hydrolysis. Despite the link between Drp1 malfunction and human disease, the molecular details of its membrane activity remain poorly understood.

What is Drp1 in biology?

Another dynamin-related protein, Drp1, which localizes primarily in the cytoplasm, is involved in mitochondrial fission, probably in cooperation with the outer-membrane proteins Fis1 (refs 1, 2, 3) and Mff4.

What is Drp1 mitochondria?

Mitochondrial dynamics is mainly regulated by a number of GTPase family proteins. While MFN1/2 and OPA1 are responsible for the fusion process, dynamin-like protein 1 (Drp1) regulates mitochondrial fission along with its adaptors proteins such as Fis1 and Mff [3, 4]. Drp1 is located mainly in the cytosol.

What does Drp1 do?

Drp1 mediates fission of the outer mitochondrial membrane that sequesters cytochrome c and other apoptogenic proteins from the cytosol in healthy cells.

How is Drp1 activated?

Drp1 binds to mitochondrial adaptors, assembles future fission sites, and severs mitochondrial membrane in a GTP hydrolysis-dependent manner [6]. The activation of Drp1 is regulated by posttranslational modification, among which phosphorylation of Drp1 can either inhibit or activate its enzymatic activity.

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