Oligomeric compounds including oligoribonucleotides and oligoribonucleosides are provided that have subsequences of 2′-pentoribofuranosyl nucleosides that activate dsRNase. The oligoribonucleotides and oligoribonucleosides can include substituent groups for increasing binding affinity to complementary nucleic acid strand as well as substituent groups for increasing nuclease resistance. The oligomeric compounds are useful for diagnostics and other research purposes, for modulating the expression of a protein in organisms, and for the diagnosis, detection and treatment of other conditions susceptible to oligonucleotide therapeutics. Also included in the invention are mammalian ribonucleases, i.e., enzymes that degrade RNA, and substrates for such ribonucleases. Such a ribonuclease is referred to herein as a dsRNase, wherein “ds” indicates the RNase's specificity for certain double-stranded RNA substrates. The artificial substrates for the dsRNases described herein are useful in preparing affinity matrices for purifying mammalian ribonuclease as well as non-degradative RNA-binding proteins.
提供了包括寡核苷酸和寡核苷的寡聚化合物,其中包含2'-戊糖核苷酸亚序列,可以激活dsRNase。这些寡核苷酸和寡核苷可以包括取代基团,以增加与互补核酸链的结合亲和力,以及取代基团,以增加
核酸酶抵抗力。这些寡聚化合物可用于诊断和其他研究目的,用于调节
生物体内蛋白质的表达,以及用于诊断、检测和治疗其他易感于寡核苷酸治疗的疾病。本发明还包括哺乳动物
核酸酶,即降解RNA的酶,以及这些
核酸酶的底物。这样的
核酸酶在本文中被称为dsRNase,其中“ds”表示RNase对某些双链RNA底物的特异性。本文所描述的dsRNases的人工底物可用于制备亲和力基质,以纯化哺乳动物
核酸酶以及非降解的RNA结合蛋白。