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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Shift syndecan-2 from RACK1 to caveolin-2 upon transformation with oncogenic ras.

Syndecan-2 was found to detach from RACK1 and associate with caveolin-2 and Ras in cells transformed with oncogenic ras. Most of syndecan-2 from transformed cells was revealed with negligible phosphorylations at tyrosine residues. We experimented with HeLa cells transfected with plasmids encoding syndecan-2 and its mutants (syndecan-2(Y180F), syndecan-2(Y192F), and syndecan-2(Y180,192F)) to provide evidences that PY(180) of syndecan-2 is a binding site for RACK1 and is deprived in cells transfected with oncogenic ras. However, in HeLa cells transfected with syndecan-2(Y180F), RACK1 was found to sustain its reactions with syndecan-2 independent of phosphorylation. The finding of syndecan-2 reactive with caveolin-2/Ras suggests the molecular complex most likely to obstruct RACK1 for functional attachment at syndecan-2, as revealed in cells transfected with oncogenic ras. We provided evidences to reinforce the view that molecular rearrangements upon transformation are specific and interesting.[1]


  1. Shift syndecan-2 from RACK1 to caveolin-2 upon transformation with oncogenic ras. Huang, J.W., Chuang, N.N. Biochem. Biophys. Res. Commun. (2006) [Pubmed]
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