A not so futile cycle?

The E3 ubiquitin ligase TRIM52 is one of the most unstable proteins in the human proteome. Curiously, however, despite having been lost in most mammals, TRIM52 has been retained in humans and old-world primates. In work recently published in Nature Communications, former PhD student Alexandra Shulkina (Versteeg lab) reveals that TRIM52 confers a fitness advantage to cells by helping to resolve topoisomerase 2 DNA lesions.