Substrate recognition component of a DCX (DDB1-CUL4-X-box) E3 protein ligase complex that mediates the ubiquitination and subsequent proteasomal degradation of target proteins (Probable). Has an essential role in mediating growth by negatively regulating insulin signaling (PubMed:27702999). It also has a role in maintaining presynaptic function in the neuromuscular junction synapses of third-instar larvae (PubMed:29530986). Protein modification; protein ubiquitination. Likely a component of a DCX (DDB1-CUL4-X-box) protein ligase complex (By similarity). May interact with pic/DDB1 (PubMed:27702999). Expressed in the fat body (at protein level). Ubiquitinated. Viable and fertile however, adults and larvae display an increase in body size and tissue growth as a result of increased cell number (PubMed:27702999). Overgrowth is due to an up-regulation in insulin-like signaling both systematically and in the fat body, which in turn results in the down-regulation of insulin-like peptide (ILP) inhibitors, conv and ImpL2, and thus allows increased activity of the ILPs (PubMed:27702999). RNAi-mediated knockdown in the fat body results in an increase in pupal length, adult body weight and posterior wing area (PubMed:27702999). The name 'Ohgata' means 'large' in Japanese and refers to the overgrowth phenotype in mutants. Belongs to the CRBN family.