We are only beginning to understand the breadth of enzyme diversity in the archaeal world. Here's an example of how an archaeon can deploy a phospholipase to kill certain bacteria...
www.biorxiv.org/content/10.6...
Archaea kill bacteria, at least on occasion. The molecular underpinnings of these lethal interactions are barely understood. Here, we describe cinquedea, an α/β hydrolase secreted by the halophilic ar...
Archaea are the hornets of the microbial world. Discuss.
www.biorxiv.org/content/10.6...
TLDR: Archaeon kills bacterium with secreted phospholipase. Pretty nifty way to kill bacteria for a microbe with a very different lipid make-up, I reckon. No need to worry about accidentally killing yourself.