Characterization of a 2′,5′-Oligoadenylate (2–5A)-dependent 37-kDa RNase L

Characterization of a 2′,5′-Oligoadenylate (2–5A)-dependent 37-kDa RNase L
复制标题

2′,5′-寡腺苷酸 (2–5A) 依赖性 37-kDa RNase L 的表征

DOI:
--
复制
发表时间:
2001
影响因子:
4.8
通讯作者:
R. Suhadolnik
R. Suhadolnik
中科院分区:
生物学2区
文献类型:
--
作者:
Susan E. Shetzline;R. Suhadolnik

文献摘要

参考文献

被引文献

相似文献

在慢性综合征患者外周血单个核细胞的提取液中发现了2‘,5’-寡腺苷(2-5A)合成酶/核糖核酸酶L途径关键成分的上调,其中包括一种低分子形式的核糖核酸酶L。在本研究中,我们分别利用光标记/免疫沉淀法和亲和分析方法完成了对2‘,5’-寡腺苷(2-5A)结合和激活80和37 kDa核糖核酸酶L的分析。用2-5A叠氮光探针[32P]pApAp(8-叠氮A)对80 kDa和37 kDa核糖核酸酶L进行了饱和光敏标记。[32P]pApAp(8-叠氮A)对80 kDa核糖核酸酶L和37 kDa核糖核酸酶L分别在3.7x10−8m和6.3x10−8m处出现半最大光插入。证明[32P]pApAp(8-叠氮A)能与80和37 kDa核糖核酸酶L的2-5A结合位点特异性结合。37 kDa核糖核酸酶L的水解率是80 kDa核糖核酸酶L的3倍。从这些2-5A结合和2-5A依赖的激活研究中获得的数据证实了[32P]pApAp(8-叠氮A)用于检测外周血单个核细胞提取液中37 kDa核糖核酸酶L的有效性。
Upregulation of key components of the 2′,5′-oligoadenylate (2–5A) synthetase/RNase L pathway have been identified in extracts of peripheral blood mononuclear cells from individuals with chronic syndrome, including the presence of a low molecular weight form of RNase L. In this study, analysis of 2′,5′-Oligoadenylate (2–5A) binding and activation of the 80- and 37-kDa forms of RNase L has been completed utilizing photolabeling/immunoprecipitation and affinity assays, respectively. Saturation of photolabeling of the 80- and the 37-kDa RNase L with the 2–5A azido photoprobe, [32P]pApAp(8-azidoA), was achieved. Half-maximal photoinsertion of [32P]pApAp(8-azidoA) occurred at 3.7 × 10−8 m for the 80-kDa RNase L and at 6.3 × 10−8 m for the 37-kDa RNase L. Competition experiments using 100-fold excess unlabeled 2–5A photoaffinity probe, pApAp(8-azidoA), and authentic 2–5A (p3A3) resulted in complete protection against photolabeling, demonstrating that [32P]pApAp(8-azidoA) binds specifically to the 2–5A-binding site of the 80- and 37-kDa RNase L. The rate of RNA hydrolysis by the 37-kDa RNase L was three times faster than the 80-kDa RNase L. The data obtained from these 2–5A binding and 2–5A-dependent activation studies demonstrate the utility of [32P]pApAp(8-azidoA) for the detection of the 37-kDa RNase L in peripheral blood mononuclear cell extracts.
通过紫外线灯或激光,溴取代的 2-5A 类似物和 2-5A 依赖性 RNase 之间的寡核苷酸-蛋白质复合物发生光化学交联。
DOI: 10.1016/0003-2697(90)90684-2
发表时间: 1990
影响因子: 2.9
作者:
Nolan-Sorden,NL;Lesiak,K;Bayard,B;Torrence,PF;Silverman,RH
通讯作者: Silverman,RH
谷氨酸脱氢酶 GTP 结合位点的鸟嘌呤结合域肽的鉴定:用金属螯合亲和层析分离。
DOI: 10.1021/bi00058a023
发表时间: 1993
期刊: Biochemistry
影响因子: 2.9
作者:
Shoemaker,MT;Haley,BE
通讯作者: Haley,BE
转录终止因子 rho 具有三个不同的结构域。
DOI: --
发表时间: 1990
期刊: The Journal of biological chemistry
影响因子: --
作者:
Dolan,JW;Marshall,NF;Richardson,JP
通讯作者: Richardson,JP
使用聚 (I)-聚 (C12U) 治疗慢性疲劳综合征的对照临床试验中 2-5A 合成酶/RNase L 抗病毒途径的变化。
DOI: --
发表时间: 1994
期刊: In vivo (Athens, Greece)
影响因子: --
作者:
Suhadolnik,RJ;Reichenbach,NL;Hitzges,P;Adelson,ME;Peterson,DL;Cheney,P;Salvato,P;Thompson,C;Loveless,M;Müller,WE
通讯作者: Müller,WE
DOI: 10.1021/bi00424a023
发表时间: 1988
期刊: Biochemistry
影响因子: 2.9
作者:
Suhadolnik,RJ;Karikó,K;SobolJr,RW;Li,SW;Reichenbach,NL;Haley,BE
通讯作者: Haley,BE