Escherichia coli tRNase Z can shut down growth probably by removing amino acids from aminoacyl‐tRNAs
Escherichia coli tRNase Z can shut down growth probably by removing amino acids from aminoacyl‐tRNAs
复制标题
大肠杆菌 tRNase Z 可能通过去除氨酰基-tRNA 中的氨基酸来停止生长
作者:
H. Takaku;M. Nashimoto
In most organisms, tRNase Z is considered to be essential for 3′ processing of tRNA molecules. The Escherichia coli tRNase Z gene, however, appears to be dispensable under normal growth conditions, and its existence remained an enigma. Here we intensively examined various (pre‐)tRNAs for good substrates of E. coli tRNase Z in vitro, and found that the enzyme can remove the 3′ terminal CCA residues from mature tRNAs regardless of their nucleotide modifications. Furthermore, we discovered that E. coli tRNase Z, when sufficiently expressed in the cell, can shut down growth probably by removing amino acids from aminoacyl‐tRNAs. We confirmed in vitro that E. coli tRNase Z exceptionally possesses the activity that cleaves off the 3′ terminal residues charging an amino acid from an aminoacyl‐tRNA molecule. The current data suggest that tRNase Z might help modulate a cell growth rate by repressing translation under some stressful conditions.
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影响因子:
4.5
作者:
N. Zareen;A. Hopkinson;L. Levinger
通讯作者:
N. Zareen;A. Hopkinson;L. Levinger
影响因子:
5.6
作者:
Zareen, N;Yan, H;Levinger, L
通讯作者:
Levinger, L
影响因子:
2.9
作者:
Karkashon, Shay;Hopkinson, Angela;Levinger, Louis
通讯作者:
Levinger, Louis
DOI:
--
发表时间:
1991
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Varshney,U;Lee,CP;RajBhandary,UL
通讯作者:
RajBhandary,UL