RTEL1 is an essential DNA helicase that prevents chromosome ends instability by disassembling telomere loops and suppressing telomere fragility, as well as playing a role in DNA replication and repair. It comprises a long C-terminal region that plays a crucial role in cell metabolism mediating RTEL1 interaction with factors involved in pivotal cellular pathways. This region includes a few small folded domains (two helical repeats and a RING finger domain) connected by partially unstructured regions