We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Eukaryotic initiation factor 6 selectively regulates Wnt signaling and beta-catenin protein synthesis.
- Authors
Ji, Y; Shah, S; Soanes, K; Islam, M N; Hoxter, B; Biffo, S; Heslip, T; Byers, S
- Abstract
Eukaryotic initiation factor 6 (eIF6), an essential protein important in ribosome biosynthesis and assembly, was identified as an interacting partner of the beta-catenin C terminus in the yeast two-hybrid assay. Independent studies identified Drosophila eIF6 (DeIF6) in a genetic screen designed to detect new genes involved in the regulation of the Wnt/Wg (wingless) pathway. Ectopic expression of DeIF6 in wing discs results in a Wg phenotype. Expression of eIF6 in adenomatous polyposis coli (APC)-mutant colon cancer cells, which express high levels of active beta-catenin, showed that eIF6 selectively inhibits the Wnt pathway at the level of beta-catenin protein independently of proteasomal degradation. Incorporation of radiolabeled amino acids into beta-catenin was selectively decreased in cells that overexpressed eIF6. A similar inverse relationship of the two proteins was observed in the APC(min/+) mouse intestine, in which beta-catenin levels are very high. Taken together these data reveal a link between eIF6 and Wnt signaling, perhaps at the level of ribosome recycling on beta-catenin mRNA.
- Publication
Oncogene, 2008, Vol 27, Issue 6, p755
- ISSN
1476-5594
- Publication type
Journal Article
- DOI
10.1038/sj.onc.1210667