Ost K A, Deutscher M P
Department of Biochemistry, University of Connecuticut Health Center, Farmington 06030.
J Bacteriol. 1991 Sep;173(17):5589-91. doi: 10.1128/jb.173.17.5589-5591.1991.
RNase PH from extracts of Escherichia coli was purified to homogeneity and subjected to NH2-terminal sequencing. Comparison of this sequence with all open reading frames in the GenBank data base revealed at least 95% identity to an unidentified open reading frame (orfE) upstream of pyrE at 81.7 min on the E. coli chromosome. Clones of orfE overexpress RNase PH activity, verifying that orfE encodes this ribonuclease. We suggest that orfE be renamed rph.
从大肠杆菌提取物中纯化出的核糖核酸酶PH至同质状态,并对其进行氨基末端测序。将该序列与基因库数据库中的所有开放阅读框进行比较,结果显示与大肠杆菌染色体上81.7分钟处pyrE上游一个未鉴定的开放阅读框(orfE)至少有95%的同一性。orfE的克隆过度表达核糖核酸酶PH活性,证实orfE编码这种核糖核酸酶。我们建议将orfE重新命名为rph。