Muration is a close relative of mutation, the best I can determine. However, this word was added specifically as an element of a list I am harvesting — words which appear in the novel Infinite Jest by David Foster Wallace. As such, the word murated should stay.
Additionally, as I've pointed out in my comment, muration is, indeed, an actual word, though it might best be considered scientific jargon.
Muration is a scientific term, the definition of which is difficult to pinpoint via Google. The best I can get, without paying for access to the full text of a journal paper, is:
Muration is the occasional (with small probability) random alteration of a gene. It may reintroduce useful genetic material, which is lost through ...
which comes from The development of a variable Schmidt number model for jet-in-crossflows using genetic algorithms, by Yanhu Guo, Guangbin He, Andrew T. Hsu (Miami, Univ., Coral Gables), A. Brankovic, S. Syed (Pratt and Whitney, West Palm Beach, FL), and N.-S. Liu (NASA, Lewis Research Center, Cleveland, OH); accessible at American Institute of Aeronautics and Astronautics.