In a textbook (Biochemistry, 2nd edition by C. Grisham and R. H. Garrett) I found the brief description of so-called calcisomes. These are vesicles/organelles that store calcium, similar to the ER. A google search revealed that calcisomes were first described in the early 80s. There haven't been many references to them, however, they seem to be present in various intracellular parasites. Are calcisomes structurally/functionally distinguishable from ER vesicles? It would be great if somebody could help with this question.
That book dates back to 1999, therefore its semantic is now obsolete.
The second chapter of this review clarifies the topic.
Article Revisiting intracellular calcium signaling semantics
Best Regards
Thanks a lot, Nicolò!
So calcisomes are protein complexes that mediate calcium signaling events while the Ca-storing vesicles should be referred to as acidocalciosomes.
Regards, Christian
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