RNA-binding component of the eukaryotic translation initiation factor 3 (eIF-3) complex, which is involved in protein synthesis of a specialized repertoire of mRNAs and, together with other initiation factors, stimulates binding of mRNA and methionyl-tRNAi to the 40S ribosome. The eIF-3 complex specifically targets and initiates translation of a subset of mRNAs involved in cell proliferation (Potential). Binds to the 18S rRNA but non-specifically (PubMed:10085088). The eukaryotic translation initiation factor 3 (eIF-3) core complex is composed of TIF32, PRT1, NIP1, TIF34 and TIF35. The factors eIF-1, eIF-2, eIF-3, TIF5/eIF-5 and methionyl-tRNAi form a multifactor complex (MFC) that may bind to the 40S ribosome. Belongs to the eIF-3 subunit G family.