CELE_C38C10.4, ags-3.3, C38C10.4

gpr-2 encodes a protein containing a GPR (G Protein Regulator)/GoLoco motif characteristic of guanine nucleotide exchange factors specific for G-alpha GTPases; GPR-2 appears to function redundantly during early embryogenesis and germ-line development to regulate chromosome and spindle movements during cell division; GPR-2 likely acts as a positive regulator of G protein signaling and specifically, may regulate GOA-1 signaling in the embryo; GPR-2 forms a protein complex with the nearly identical GPR-1 and with LIN-5, a coiled-coil protein that is required for proper localization of GPR-2 to the cell cortex and spindle asters of the early embryo; in addition, proper GPR-2/GPR-1/LIN-5 localization between the P2 and EMS blastomeres at the four-cell stage, which may contribute to spindle positioning in EMS, requires the MES-1/SRC-1 tyrosine kinase signaling pathway; GPR-2 is believed to act downstream of, or in parallel to, PAR-3, a PDZ domain-containing protein, in mitotic spindle positioning in the early embryo.

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