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  • Title: The C. elegans PH domain protein CED-12 regulates cytoskeletal reorganization via a Rho/Rac GTPase signaling pathway.
    Author: Zhou Z, Caron E, Hartwieg E, Hall A, Horvitz HR.
    Journal: Dev Cell; 2001 Oct; 1(4):477-89. PubMed ID: 11703939.
    Abstract:
    The C. elegans gene ced-12 functions in the engulfment of apoptotic cells and in cell migration, acting in a signaling pathway with ced-2 Crkll, ced-5 DOCK180, and ced-10 Rac GTPase and acting upstream of ced-10 Rac. ced-12 encodes a protein with a pleckstrin homology (PH) domain and an SH3 binding motif, both of which are important for ced-12 function. CED-12 acts in engulfing cells for cell corpse engulfment and interacts physically with CED-5, which contains an SH3 domain. CED-12 has Drosophila and human counterparts. Expression of CED-12 and its counterparts in murine Swiss 3T3 fibroblasts induced Rho GTPase-dependent formation of actin filament bundles. We propose that through interactions with membranes and with a CED-2/CED-5 protein complex, CED-12 regulates Rho/Rac GTPase signaling and leads to cytoskeletal reorganization by an evolutionarily conserved mechanism.
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