This gene encodes a member of the HECT E3 ubiquitin ligase family. The HECT domain lies in the C-terminus and contains the active-site cysteine which forms an intermediate ubiquitin-thioester bond. E3 family members are divided into three subfamilies based on their protein-protein interaction domains; this gene encodes a member of the SI(ngle)-HECT E3 subfamily. In lung, breast, and colorectal carcinomas, this gene is highly expressed. Mutations in this gene has been found in 3 unrelated families with X-linked syndromic mental retardation, Turner type. [provided by RefSeq, Nov 2009] (from
Caniggia et al., Toronto, Canada. In Cell Death Dis, 2011
In PE, MULE preferentially targeted p53 for degradation, allowing accumulation of pro-apoptotic Mcl-1 isoforms. In IUGR, however, MULE targeted pro-survival Mcl-1, allowing p53 to accumulate and exert its apoptotic function.