The pericentriolar recycling endosome is a fascinating organelle. It localizes within the centriolar regions of an animal cell where it does its job of degrading and recycling cell debris, including bacterial remnants. The location of this activity is reminescent of a model for animal mitotic evolution that is shown in this blog. In this model, a primitive cytopharnyx is used to capture bacterial prey by attaching “microtubules” to it that are then pulled back into the cytopharnyx along with the bacteria for consumption by the cell.
On a random note, if eukaryotes evolved from prokaryotes, there should be evidence for microtubules in at least some bacteria, right? Click here.