Cross-linking of Met-tRNAf to eIF-2 beta and to the ribosomal proteins S3a and S6 within the eukaryotic inhibition complex, eIF-2 .GMPPCP.Met-tRNAf.small ribosomal subunit.
In the quaternary initiation complex, eIF-2.GMPPCP.Met-tRNAf.40S ribosomal subunit, the Met-tRNAf can be cross-linked to the beta subunit of initiation factor eIF-2 as well as to ribosomal proteins S3a and S6 by treatment with the bifunctional reagent, diepoxybutane. Using 40S subunits, modified in advance with the heterobifunctional reagent, methyl-rho-azido-benzoylaminoacetimidate, Met-tRNAf is covalently bound to the same ribosomal proteins (S3a and S6) upon irradiation of the complex with ultraviolet light. Under both conditions proteins S3a and S6, together with a limited number of other ribosomal proteins, are covalently bound to 18S ribosomal RNA.
D003432:Cross-Linking Reagents; D015852:Eukaryotic Initiation Factor-2; D007700:Kinetics; D046911:Macromolecular Substances; D010448:Peptide Initiation Factors / Q000378:metabolism*; D011506:Proteins / Q000378:metabolism*; D012346:RNA, Transfer, Amino Acyl / Q000378:metabolism*; D012358:RNA, Transfer, Met; D038601:Ribosomal Protein S6; D012269:Ribosomal Proteins / Q000378:metabolism*; D012270:Ribosomes / Q000378:metabolism*
D003432:Cross-Linking Reagents; D015852:Eukaryotic Initiation Factor-2; D046911:Macromolecular Substances; D010448:Peptide Initiation Factors; D011506:Proteins; D012346:RNA, Transfer, Amino Acyl; D012358:RNA, Transfer, Met; D038601:Ribosomal Protein S6; D012269:Ribosomal Proteins; C024988:tRNA, formylmethionine-