Abstract
A breast cancer-associated mRNA originally cloned as a 475-bp partial cDNA from a library enriched for tumour cDNAs [Oncogene 16 (1998) 327] is expressed at high levels in breast and prostate cancer cells. Immunohistochemical analysis indicates that the protein is expressed in primary breast tumours. We used RT-PCR to generate a full-length 2852 nt mRNA sequence that includes the hypothetical open reading frame (ORF) for human RNF11. Our analysis shows that RNF11 encodes modular domains and motifs likely to interact with other proteins involved in oncogenesis. Chief among these are the RING-H2 finger domain that could facilitate the degradation of specific substrate(s) involved in oncogenesis and the PY motif which binds to WW-domain proteins, several of which are known to be E3 ubiquitin ligases. Our GST-pulldown and immunoprecipitation results indicate that RNF11 interacts with the E3 ligase AIP4 when coexpressed with RNF11 in mammalian cells.
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