Represses translation of the downstream SCRIB protein (PubMed:34535749). Translation of oSCRIB hinders SCRIB translation but does not completely abolish it, probably due to leaky scanning which allows the ribosome to bypass the weaker oSCRIB start codon and initiate translation at the stronger SCRIB start codon (PubMed:34535749). This protein is produced by a polycistronic gene which also produces the tumor suppressor gene SCRIB from an overlapping reading frame.