JOURNAL ARTICLE
RESEARCH SUPPORT, U.S. GOV'T, NON-P.H.S.
RESEARCH SUPPORT, U.S. GOV'T, P.H.S.
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The LIN-2/LIN-7/LIN-10 complex mediates basolateral membrane localization of the C. elegans EGF receptor LET-23 in vulval epithelial cells.

Cell 1998 September 19
In C. elegans, the LET-23 receptor tyrosine kinase is localized to the basolateral membranes of polarized vulval epithelial cells. lin-2, lin-7, and lin-10 are required for basolateral localization of LET-23, since LET-23 is mislocalized to the apical membrane in lin-2, lin-7, and lin-10 mutants. Yeast two-hybrid, in vitro binding, and in vivo coimmunoprecipitation experiments show that LIN-2, LIN-7, and LIN-10 form a protein complex. Furthermore, compensatory mutations in lin-7 and let-23 exhibit allele-specific suppression of apical mislocalization and signaling-defective phenotypes. These results present a mechanism for basolateral localization of LET-23 receptor tyrosine kinase by direct binding to the LIN-2/LIN-7/LIN-10 complex. Each of the binding interactions within this complex is conserved, suggesting that this complex may also mediate basolateral localization in mammals.

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