Flanking sequences are required for efficient transcription and stable complex formation for the human tRNAiMet3-coding gene.
An analysis of 5' and 3' deletions of the human tRNAiMet3 gene has revealed upstream regions required for efficient transcription and stable complex formation in vitro. The 5' boundary of this essential region lies between nucleotides -39 to -18 (start point = + 1), and it has been shown that 3'-flanking sequences near the first termination site are also important for stable complex formation. The transcriptional efficiency of two non-allelic loci (TMET3 and TMET2) has been compared and TMET2 is more active. An analysis of chimeric (hybrid) genes indicates that much of the difference seen is due to 5'-flanking sequences and that there may be complex interactions between 5' and 3' sequences.
Wahab
S Z
SZ
Department of Biochemistry and Molecular Biophysics, Medical College of Virginia, Virginia Commonwealth University, Richmond 23298-0614.
Holmes
W M
WM
Zehner
Z E
ZE
D000818:Animals; D001483:Base Sequence; D001667:Binding, Competitive; D002460:Cell Line; D002872:Chromosome Deletion; D004247:DNA / Q000235:genetics / Q000378:metabolism; D004274:DNA, Recombinant; D005796:Genes; D006801:Humans; D005810:Multigene Family; D010957:Plasmids; D012345:RNA, Transfer, Amino Acid-Specific / Q000235:genetics*; D012358:RNA, Transfer, Met / Q000235:genetics*; D012045:Regulatory Sequences, Nucleic Acid; D013728:Terminator Regions, Genetic; D014158:Transcription, Genetic
D004274:DNA, Recombinant; D012345:RNA, Transfer, Amino Acid-Specific; D012358:RNA, Transfer, Met; D004247:DNA