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Mutational analyses of dinucleotide and tetranucleotide microsatellites in Escherichia coli: influence of sequence on expansion mutagenesis.大肠杆菌中二核苷酸和四核苷酸微卫星的突变分析:序列对扩增诱变的影响。
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2
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Phasome analysis of pathogenic and commensal Neisseria species expands the known repertoire of phase variable genes, and highlights common adaptive strategies.致病性奈瑟菌和共生奈瑟菌的相变体分析扩展了已知的相变体基因库,并突出了常见的适应性策略。
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10
Human postmeiotic segregation 2 exhibits biased repair at tetranucleotide microsatellite sequences.人类减数分裂后分离2在四核苷酸微卫星序列处表现出偏向性修复。
Cancer Res. 2009 Feb 1;69(3):1143-9. doi: 10.1158/0008-5472.CAN-08-3499. Epub 2009 Jan 20.

本文引用的文献

1
Somatic mutation rates and specificities at TC/AG and GT/CA microsatellite sequences in nontumorigenic human lymphoblastoid cells.非致瘤性人淋巴母细胞中TC/AG和GT/CA微卫星序列的体细胞突变率及特异性
Cancer Res. 2000 Mar 15;60(6):1698-703.
2
Correspondence re: C.R. Boland et al., A National Cancer Institute workshop on microsatellite instability for cancer detection and familial predisposition: development of international criteria for the determination of microsatellite instability in colorectal cancer. Cancer Res., 58: 5248-5257, 1998.致信:C.R. 博兰等人,美国国立癌症研究所关于微卫星不稳定性在癌症检测和家族易感性方面的研讨会:结直肠癌微卫星不稳定性判定国际标准的制定。《癌症研究》,58卷:5248 - 5257页,1998年
Cancer Res. 1999 Jan 1;59(1):249-56.
3
A National Cancer Institute Workshop on Microsatellite Instability for cancer detection and familial predisposition: development of international criteria for the determination of microsatellite instability in colorectal cancer.美国国立癌症研究所微卫星不稳定性用于癌症检测和家族易感性研讨会:制定结直肠癌微卫星不稳定性测定的国际标准。
Cancer Res. 1998 Nov 15;58(22):5248-57.
4
Mutation rate of a microsatellite sequence in normal human fibroblasts.正常人成纤维细胞中微卫星序列的突变率。
Cancer Res. 1998 Sep 1;58(17):3946-9.
5
Equilibrium distributions of microsatellite repeat length resulting from a balance between slippage events and point mutations.由滑动事件和点突变之间的平衡所导致的微卫星重复长度的平衡分布。
Proc Natl Acad Sci U S A. 1998 Sep 1;95(18):10774-8. doi: 10.1073/pnas.95.18.10774.
6
Yeast ARMs (DNA at-risk motifs) can reveal sources of genome instability.酵母ARMs(基因组不稳定风险基序)能够揭示基因组不稳定的来源。
Mutat Res. 1998 May 25;400(1-2):45-58. doi: 10.1016/s0027-5107(98)00047-5.
7
Trinucleotide repeat DNA structures: dynamic mutations from dynamic DNA.三核苷酸重复DNA结构:源于动态DNA的动态突变
Curr Opin Struct Biol. 1998 Jun;8(3):321-30. doi: 10.1016/s0959-440x(98)80065-1.
8
GAA instability in Friedreich's Ataxia shares a common, DNA-directed and intraallelic mechanism with other trinucleotide diseases.弗里德赖希共济失调中的GAA不稳定与其他三核苷酸疾病具有共同的、由DNA指导的等位基因内机制。
Mol Cell. 1998 Mar;1(4):583-93. doi: 10.1016/s1097-2765(00)80058-1.
9
Differences and similarities between various tandem repeat sequences: minisatellites and microsatellites.各种串联重复序列之间的差异与相似之处:小卫星和微卫星。
Biochimie. 1997 Oct;79(9-10):577-86. doi: 10.1016/s0300-9084(97)82006-8.
10
Hypermutability of homonucleotide runs in mismatch repair and DNA polymerase proofreading yeast mutants.错配修复和DNA聚合酶校对酵母突变体中同核苷酸序列的高突变性
Mol Cell Biol. 1997 May;17(5):2859-65. doi: 10.1128/MCB.17.5.2859.

大肠杆菌中二核苷酸和四核苷酸微卫星的突变分析:序列对扩增诱变的影响。

Mutational analyses of dinucleotide and tetranucleotide microsatellites in Escherichia coli: influence of sequence on expansion mutagenesis.

作者信息

Eckert K A, Yan G

机构信息

The Jake Gittlen Cancer Research Institute, The Pennsylvania State University College of Medicine, PO Box 850, Hershey, PA 17033, USA.

出版信息

Nucleic Acids Res. 2000 Jul 15;28(14):2831-8. doi: 10.1093/nar/28.14.2831.

DOI:10.1093/nar/28.14.2831
PMID:10908342
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC102660/
Abstract

Mutagenesis at GT/CA, TC/AG and TTCC/AAGG microsatellite sequences inserted in the herpes simplex virus thymidine kinase (HSV-tk) gene was analyzed in isogenic mutL(+) and mutL(-) Escherichia coli. In both strains, significantly more expansion than deletion mutations were observed at the TTCC/AAGG motif relative to either dinucleotide motif. As the HSV-tk coding sequence contains an endogenous G/C mononucleotide repeat and approximately 1000 bp of unique sequence, we were able to compare mutagenesis among various sequence motifs. We observed that the relative risk of mutation in E.COLI: is: TTCC/AAGG > GT/CA approximately TC/AG > unique approximately G/C. The mutation frequency varied 1400-fold in mutL(+) cells between the tetranucleotide motif and the mononucleotide motif, but only 50-fold in mutL(-) cells. The G/C sequence was destabilized the greatest and the tetranucleotide motif the least by loss of mismatch repair. These results demonstrate that the quantitative risk of mutation at various microsatellites greatly depends on the DNA sequence composition. We suggest alternative models for the production of expansion mutations during lagging strand replication of the TTCC/AAGG microsatellite.

摘要

在同基因的mutL(+)和mutL(-)大肠杆菌中,分析了插入单纯疱疹病毒胸苷激酶(HSV-tk)基因的GT/CA、TC/AG和TTCC/AAGG微卫星序列的诱变情况。在这两种菌株中,相对于任何一种二核苷酸基序,在TTCC/AAGG基序处观察到的扩增突变明显多于缺失突变。由于HSV-tk编码序列包含一个内源性的G/C单核苷酸重复序列和约1000 bp的独特序列,我们能够比较不同序列基序之间的诱变情况。我们观察到大肠杆菌中突变的相对风险为:TTCC/AAGG > GT/CA 约等于 TC/AG > 独特序列 约等于 G/C。在mutL(+)细胞中,四核苷酸基序和单核苷酸基序之间的突变频率相差1400倍,但在mutL(-)细胞中仅相差50倍。由于错配修复的丧失,G/C序列最不稳定,四核苷酸基序最稳定。这些结果表明,各种微卫星处突变的定量风险在很大程度上取决于DNA序列组成。我们提出了在TTCC/AAGG微卫星滞后链复制过程中产生扩增突变的替代模型。