Inhibition of DNA replication and DNA polymerase alpha activity by monoclonal anti-(DNA polymerase alpha) immunoglobulin G and F(ab) fragments.

Inhibition of DNA replication and DNA polymerase alpha activity by monoclonal anti-(DNA polymerase alpha) immunoglobulin G and F(ab) fragments.
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单克隆抗(DNA 聚合酶 α)免疫球蛋白 G 和 F(ab) 片段抑制 DNA 复制和 DNA 聚合酶 α 活性。

DOI:
10.1021/bi00346a061
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发表时间:
1985
期刊:
影响因子:
2.9
通讯作者:
Ulrich,RG
Ulrich,RG
中科院分区:
生物学3区
文献类型:
--
作者:
Miller,MR;Seighman,C;Ulrich,RG

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西弗吉尼亚大学医学院生物化学系,Morgantown,West Virginia 26506,以及Upjohn Company,Kalamazoo,Michigan 49001病理学和毒理学研究,1985年6月13日接收摘要:单克隆抗-(DNA聚合酶a)免疫球蛋白G(IgG)和F(ab)片段对溶血素中DNA复制的影响-测定透化的人细胞和DNA聚合酶α的活性。相同浓度的单克隆IgG和F(ab)片段对体外DNA聚合酶a活性的抑制作用相同。然而,IgG和F(ab)片段在抑制可渗透细胞中的DNA复制方面并不同等有效。一般而言,F(ab)片段在抑制DNA复制方面比IgG强0倍,表明F(ab)片段比IgG更容易穿过核膜。免疫细胞化学研究表明,至少有一部分抗(DNA聚合酶a)IgG进入细胞核。对于测试的大多数抗体,抑制复制所需的IgG或F(ab)浓度比中和从相同数量的细胞中提取的聚合酶a活性所需的浓度高几个数量级。抗(DNA聚合酶a)F(ab)片段显示出抑制冈崎DNA的不连续合成,以及冈崎DNA成熟为更大的DNA,从而暗示DNA聚合酶a在这两个过程中。
Department of Biochemistry, West Virginia University Medical School, Morgantown, West Virginia 26506, and Pathology and Toxicology Research, The Upjohn Company, Kalamazoo, Michigan 49001 Received June 13, 1985 abstract: The effect of monoclonal anti-(DNA polymerase a) immunoglobulin G (IgG) and F (ab) fragments on DNA replication in lysolecithin-permeabilized human cells and on DNA polymerase a activity was determined. DNA polymerase a activity in vitro was inhibited equally by the same concentrations of monoclonal IgGs and F (ab) fragments. However, the IgGs and F (ab) fragments were not equally potent in inhibiting DNA replication in permeable cells. In general, the F (ab) fragments were 0-fold more potent than IgGs in inhibiting DNA replication, suggesting the F (ab) fragments cross the nuclear membrane more readily than IgGs. Immunocytochemical studies demonstrated that at least a fraction ofanti-(DNA polymerase a) IgGs entered the nucleus of permeable cells. For most antibodies tested, the IgG or F (ab) concentration needed to inhibit replication was several orders of magnitude higher than that needed to neutralize polymerase a activity extracted from the same number of cells. Anti-(DNA polymerase a) F (ab) fragments were shown to inhibit the discontinuous synthesis of Okazaki DNA, as well as the maturation of Okazaki DNA to larger DNA, thereby implicating DNA polymerase a in both of these processes.
DOI: --
发表时间: 1984
影响因子: 7.8
作者:
L. Einck;M. Bustin
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人类淋巴细胞中的 DNA 合成:体外和体内 DNA 合成的中间体。
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发表时间: 1975
影响因子: 5.6
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发表时间: 1978
期刊: Biochemistry
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发表时间: 1982
期刊: The Journal of biological chemistry
影响因子: --
作者:
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DOI: 10.1073/pnas.80.22.6735
发表时间: 1983-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子: --
作者:
EINCK, L;BUSTIN, M
通讯作者: BUSTIN, M