Rac-1 and IQGAP are potential regulators of E-cadherin-catenin interactions during murine preimplantation development.
Adherens junction formation is fundamental for compaction and trophectoderm differentiation during mammalian preimplantation development. We recently isolated an IQGAP-2 cDNA from a differential display-polymerase chain reaction screen of bovine preimplantation developmental stages. IQGAP-1 and -2 proteins mediate E-cadherin-based cell-to-cell adhesion through interactions with beta-catenin and the Rho GTPases, rac1 and cdc42. Our study demonstrates IQGAP-1,-2, rac-1 and cdc42 mRNAs are present throughout murine preimplantation development. IQGAP-1 and rac-1 protein distribution changes from predominantly plasma membrane associated to predominantly cytoplasmic as the embryo progresses through cleavage divisions and compaction to the blastocyst stage.
D000818:Animals; D001755:Blastocyst / Q000378:metabolism; D015820:Cadherins / Q000378:metabolism; D002462:Cell Membrane / Q000378:metabolism; D047108:Embryonic Development; D051379:Mice; D051176:beta Catenin / Q000378:metabolism
D015820:Cadherins; D051176:beta Catenin