Patterns of somatic mutations in immunoglobulin variable genes.

Patterns of somatic mutations in immunoglobulin variable genes.
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免疫球蛋白可变基因的体细胞突变模式。

DOI:
10.1093/genetics/115.1.169
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发表时间:
1987
期刊:
影响因子:
3.3
通讯作者:
Glickman,BW
Glickman,BW
中科院分区:
生物学2区
文献类型:
--
作者:
Golding,GB;Gearhart,PJ;Glickman,BW

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负责抗体可变基因中的体细胞突变的机制是未知的,并且可能不同于先前描述的在DNA中产生突变的机制。我们分析了来自小鼠重排免疫球蛋白可变基因的421个体细胞突变,以确定(1)核苷酸取代是否与减数分裂期间产生的核苷酸取代不同,以及(2)附近直接和反向重复序列的存在是否可以模板化可变基因周围的突变。结果表明,体细胞突变和减数分裂突变所产生的取代模式不同.与减数分裂突变体相比,体细胞突变体中T:A到C:G转换的频率增加,涉及G的突变频率降低。这表明,抗体基因中负责体细胞突变的突变过程不同于减数分裂期间负责突变的过程。对局部DNA序列的分析揭示了许多能够模板化一些已知突变的正向重复序列和回文序列。虽然其他因素可能参与靶向可变基因的突变,但附近重复序列的错误模板可能提供了增强体细胞突变的机制。
The mechanism responsible for somatic mutation in the variable genes of antibodies is unknown and may differ from previously described mechanisms that produce mutation in DNA. We have analyzed 421 somatic mutations from the rearranged immunoglobulin variable genes of mice to determine (1) if the nucleotide substitutions differ from those generated during meiosis and (2) if the presence of nearby direct and inverted repeated sequences could template mutations around the variable gene. The results reveal a difference in the pattern of substitutions obtained from somatic mutationsvs.meiotic mutations. An increased frequency of T:A to C:G transitions and a decreased frequency of mutations involving a G in the somatic mutants compared to the meiotic mutants is indicated. This suggests that the mutational processes responsible for somatic mutation in antibody genes differs from that responsible for mutation during meiosis. An analysis of the local DNA sequences revealed many direct repeats and palindromic sequences that were capable of templating some of the known mutations. Although additional factors may be involved in targeting mutations to the variable gene, mistemplating by nearby repeats may provide a mechanism for the enhancement of somatic mutation.
DOI: --
发表时间: 1986
影响因子: 4.8
作者:
T. Kunkel;P. S. Alexander
通讯作者: P. S. Alexander
小鼠重链可变区:种系VH基因片段的核苷酸序列。
DOI: --
发表时间: 1981
影响因子: 14.9
作者:
R. Ollo;Charles Auffray;Jean;François Rougeon
通讯作者: François Rougeon
影响因子: 11.1
作者:
J. D. de Boer;L. S. Ripley
通讯作者: L. S. Ripley
两种类型的体细胞重组对于产生完整的免疫球蛋白重链基因是必需的
DOI: --
发表时间: 1980
期刊: Nature
影响因子: 64.8
作者:
H. Sakano;R. Maki;Y. Kurosawa;W. Roeder;S. Tonegawa
通讯作者: S. Tonegawa
小鼠染色体重排的lambda 2免疫球蛋白基因的核苷酸序列
DOI: --
发表时间: 1982
期刊: Nucleic Acids Res.
影响因子: --
作者:
Gillian E. Wu;N. Govindji;Nobumichi Hozumi;H. Murialdo
通讯作者: H. Murialdo