Phosphorylation of RNA polymerases: specific association of protein kinase NII with RNA polymerase I.

Phosphorylation of RNA polymerases: specific association of protein kinase NII with RNA polymerase I.
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RNA 聚合酶的磷酸化:蛋白激酶 NII 与 RNA 聚合酶 I 的特异性关联。

DOI:
10.1098/rstb.1983.0046
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发表时间:
1983
期刊:
Philosophical transactions of the Royal Society of London. Series B, Biological sciences
影响因子:
--
通讯作者:
Jacob,ST
Jacob,ST
中科院分区:
--
文献类型:
--
作者:
Rose,KM;Stetler,DA;Jacob,ST

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从一个快速增长的大鼠肿瘤,莫里斯肝癌3924 A,并从大鼠肝脏的三个DNA依赖的RNA聚合酶的活动进行了检查。RNA聚合酶I的活性在肿瘤中高于在肝脏中。RNA合成能力的增强是肿瘤中聚合酶I浓度较高以及该酶体内激活的结果。研究了肝癌聚合酶I的高比活性是由磷酸化引起的可能性。两个主要的环AMP-独立的核酪蛋白激酶(NI和NIL)被确定;蛋白激酶NIL在肿瘤中的活性是在肝脏中的10倍。蛋白激酶Nil能在体外激活和磷酸化RNA聚合酶I。这种激酶也可以刺激RNA聚合酶II的活性,尽管程度低于RNA聚合酶I。RNA聚合酶III不受蛋白激酶NIL的影响蛋白激酶NIL与聚合酶I紧密相关,即使在纯化的聚合酶制剂中也能发现。某些风湿性自身免疫性疾病患者血清中存在RNA聚合酶I和蛋白激酶Nil的抗体。这些结果表明,RNA聚合酶I和蛋白激酶NI 1在体内和体外都有密切的联系,并且聚合酶磷酸化可能调节细胞中核糖体RNA的合成速率。
The activities of the three DNA-dependent RNA polymerases from a rapidly growing rat tumour, Morris hepatoma 3924 A, and from rat liver were examined. The activity of RNA polymerase I was higher in the tumour than in the liver. The enhanced capacity for RNA synthesis was a result of a higher concentration of polymerase I in the tumour as well as of an activation of this enzyme vivo. The possibility that the high specific activity of the hepatoma polymerase I resulted from phosphorylation was investigated. Two major cyclic-AMP-independent nuclear casein kinases (NI and N il) were identified; the activity of protein kinase N il in the tumour was ten times that in liver. Protein kinase N il was capable of activating and phosphorylating RNA polymerase Iin vitro. This kinase could also stimulate RNA polymerase II activity, although to a lesser extent than RNA polymerase I. RNA polymerase III was not affected by protein kinase NIL Protein kinase N il was tightly associated with polymerase I and was found even in purified preparations of the polymerase. Antibodies against both RNA polymerase I and protein kinase N il were present in sera of patients with certain rheumatic autoimmune diseases. These results imply that RNA polymerase I and protein kinase NIl are in close associationin vivoas well asin vitroand that polymerase phosphorylation may regulate the rate of ribosomal RNA synthesis in the cell.
风湿性自身免疫性疾病患者血清中 RNA 聚合酶 I 不同多肽的抗体。
DOI: 10.1073/pnas.79.23.7499
发表时间: 1982
影响因子: 11.1
作者:
Stetler,DA;Rose,KM;Wenger,ME;Berlin,CM;Jacob,ST
通讯作者: Jacob,ST
3 – 原核生物和真核生物转录的基本酶学
DOI: 10.1016/b978-0-12-289503-6.50010-2
发表时间: 1980
期刊: Isozymes
影响因子: --
作者:
S. Jacob;K. Rose
通讯作者: K. Rose
肿瘤中的RNA聚合酶。
DOI: --
发表时间: 1981
期刊: Isozymes
影响因子: --
作者:
Rose,KM;Duceman,BW;Jacob,ST
通讯作者: Jacob,ST
DOI: 10.1042/bj1900781
发表时间: 1980
期刊: The Biochemical journal
影响因子: --
作者:
Duceman,BW;Jacob,ST
通讯作者: Jacob,ST
细胞质中鉴定的 RNA 聚合酶核起源的证据:从等渗蔗糖中分离的细胞核释放酶。
DOI: 10.1016/0006-291x(76)90968-2
发表时间: 1976
影响因子: 3.1
作者:
Y. C. Lin;K. Rose;S. Jacob
通讯作者: S. Jacob