Characterization of initiation factor 3 from wheat germ. 2. Effects of polyclonal and monoclonal antibodies on activity.
Rabbit polyclonal antibodies to wheat germ initiation factor 3 (eIF-3) were obtained and were shown to react strongly with 4 of the 10 subunits of eIF-3 (pp116, pp87, pp56, and pp36). Two mouse monoclonal antibodies were obtained, one of which reacts specifically with pp87 and one of which reacts specifically with pp36. Highly purified anti-pp87 has no effect on the activity of eIF-3. Highly purified polyclonal antibodies and anti-pp36 inhibit the ability of eIF-3 to support polypeptide synthesis in vitro and the ability of eIF-3 to support mRNA binding to 40S ribosomal subunits. These results provide additional evidence that pp116, pp87, and pp36 are in exposed positions in the eIF-3 particle and that pp36 is essential for activity.
D000906:Antibodies; D000911:Antibodies, Monoclonal / Q000302:isolation & purification; D000936:Antigen-Antibody Complex; D004797:Enzyme-Linked Immunosorbent Assay; D039621:Eukaryotic Initiation Factor-3; D007124:Immunoenzyme Techniques; D007700:Kinetics; D008970:Molecular Weight; D010448:Peptide Initiation Factors / Q000276:immunology / Q000378:metabolism*; D012269:Ribosomal Proteins / Q000378:metabolism*; D012639:Seeds / Q000378:metabolism; D014908:Triticum / Q000378:metabolism
D000906:Antibodies; D000911:Antibodies, Monoclonal; D000936:Antigen-Antibody Complex; D039621:Eukaryotic Initiation Factor-3; D010448:Peptide Initiation Factors; D012269:Ribosomal Proteins