Abstract:
:To investigate the identity determinants of E. coli threonine tRNA, various transcripts were prepared by in vitro transcription system with T7 RNA polymerase. Substitutions of the anticodon second letter G35 and the third letter U36 to other nucleotides led to a remarkable decrease of threonine charging activity. Charging experiments with a series of anticodon-deletion transcripts also suggest the importance of the G35U36 sequence. A mutation at either the G1-C72 or C2-G71 base pair in the acceptor stem seriously affected the threonine charging activity. These results indicate that the second and third positions of the anticodon and the first and second base pairs in the acceptor stem are the recognition sites of E. coli tRNA(THR) for threonyl-tRNA synthetase. Discriminator base, A73, is not involved in threonine charging activity.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Hasegawa T,Miyano M,Himeno H,Sano Y,Kimura K,Shimizu Mdoi
10.1016/0006-291x(92)91219-gsubject
Has Abstractpub_date
1992-04-15 00:00:00pages
478-84issue
1eissn
0006-291Xissn
1090-2104pii
0006-291X(92)91219-Gjournal_volume
184pub_type
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