Photochemical crosslinking in oligonucleotide-protein complexes between a bromine-substituted 2-5A analog and 2-5A-dependent RNase by ultraviolet lamp or laser.

Photochemical crosslinking in oligonucleotide-protein complexes between a bromine-substituted 2-5A analog and 2-5A-dependent RNase by ultraviolet lamp or laser.
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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
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发表时间:
1990
影响因子:
2.9
通讯作者:
Silverman,RH
Silverman,RH
中科院分区:
生物学4区
文献类型:
--
作者:
Nolan-Sorden,NL;Lesiak,K;Bayard,B;Torrence,PF;Silverman,RH

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相似文献

2',5'-寡腺苷酸,称为 2-5A [px(A2'p)nA; x = 2 或 3, n ≥ 2] 是在干扰素处理的细胞中响应双链 RNA 产生的。 2-5A 以高亲和力与 2-5A 依赖性 RNase 结合,导致单链 RNA 裂解。开发了一种高效、快速且极其灵敏的光亲和标记方法,以促进 2-5A 依赖性 RNase 的检测。合成了 2-5A 的溴取代放射性衍生物,即 5'-单磷酸盐 p(A2'p)2(br8A2'p)2A3'-[32P]Cp,作为 2-5A 依赖性 RNase 的探针。尽管这种溴取代的 2-5A 类似物没有 5'-末端三磷酸或二磷酸,但它以与 2-5A 本身相同的高亲和力与 2-5A 依赖性 RNase 结合,但在目前的测定条件下,它是 RNase 的不太有效的激活剂。 2-5A 类似物中溴原子的存在通过在紫外灯下与 2-5A 依赖性 RNase 交联超过 200 倍而增强;许多其他多肽也被标记,但水平低得多。此外,使用高强度紫外激光照射(308 nm),可以在 10−6 秒内轻松实现溴取代的 2-5A 类似物与 2-5A 依赖性 RNase 的共价连接。
2′,5′-oligoadenylates known as 2-5A [px(A2′p)nA; x = 2 or 3, n ≥ 2] are produced in interferon-treated cells in response to double-stranded RNA. 2-5A binds with high affinity to a 2-5A-dependent RNase resulting in the cleavage of single-stranded RNA. An efficient, rapid, and extremely sensitive photoaffinity labeling method was developed to facilitate detection of 2-5A-dependent RNase. A bromine-substituted and radioactive derivative of 2-5A, the 5′-monophosphate, p(A2′p)2(br8A2′p)2A3′-[32P]Cp, was synthesized as probe for 2-5A-dependent RNase. Even though this bromine-substituted analog of 2-5A bore no 5′-terminal triphosphate or diphosphate, it bound to 2-5A-dependent RNase with the same high affinity as did 2-5A per se but it was a less effective activator of the RNase under the present assay conditions. The presence of bromine atoms in the 2-5A analog enhanced by more than 200-fold crosslinking to 2-5A-dependent RNase under a uv lamp; many additional polypeptides were also labeled but at much lower levels. Furthermore, using high-intensity uv laser irradiation (308 nm) covalent attachment of the bromine-substituted 2-5A analog to 2-5A-dependent RNase was readily achieved within 10−6s.
干扰素处理的 EMC 病毒感染的 L 细胞中自然出现 2-5A
DOI: 10.1038/282582a0
发表时间: 1979
期刊: Nature
影响因子: 64.8
作者:
B. Williams;R. R. Golgher;R. R. Golgher;Ronald E. Brown;Christopher S. Gilbert;I. M. Kerr
通讯作者: I. M. Kerr
DOI: 10.1038/288189a0
发表时间: 1980-01-01
期刊: NATURE
影响因子: 64.8
作者:
KNIGHT, M;CAYLEY, PJ;KERR, IM
通讯作者: KERR, IM
在干扰素治疗和细胞分化过程中调节 ppp(A2p)nA 依赖性 RNase 水平。
DOI: 10.1111/j.1432-1033.1985.tb08695.x
发表时间: 1985
期刊: European journal of biochemistry
影响因子: --
作者:
Krause,D;Silverman,RH;Jacobsen,H;Leisy,SA;Dieffenbach,CW;Friedman,RM
通讯作者: Friedman,RM
DOI: --
发表时间: 1987
影响因子: 4.8
作者:
K. Lesiak;P. Torrence
通讯作者: P. Torrence
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