Title : The Arg280His polymorphism in X-ray repair cross-complementing gene 1 impairs DNA repair ability.

Pub. Date : 2005 Apr 4

PMID : 15781218






8 Functional Relationships(s)
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Protein Name
Organism
1 The EM9 cells that lack functional XRCC1 proteins exhibit severe sensitivity to methyl methanesulfonate (MMS). Methyl Methanesulfonate X-ray repair cross complementing 1 Homo sapiens
2 The EM9 cells that lack functional XRCC1 proteins exhibit severe sensitivity to methyl methanesulfonate (MMS). Methyl Methanesulfonate X-ray repair cross complementing 1 Homo sapiens
3 Introduction of the human XRCC1(WT) and XRCC1(R194W) gene to EM9 cells restored the MMS sensitivity to the same level as the AA8 cells, a parental cell line. Methyl Methanesulfonate X-ray repair cross complementing 1 Homo sapiens
4 Introduction of the human XRCC1(WT) and XRCC1(R194W) gene to EM9 cells restored the MMS sensitivity to the same level as the AA8 cells, a parental cell line. Methyl Methanesulfonate X-ray repair cross complementing 1 Homo sapiens
5 However, introduction of the XRCC1(R280H) gene partially restored the MMS sensitivity, resulting in a 1.7- to 1.9-fold higher sensitivity to MMS compared with XRCC1(WT) and XRCC1(R194W) cells at the LD(50) value. Methyl Methanesulfonate X-ray repair cross complementing 1 Homo sapiens
6 However, introduction of the XRCC1(R280H) gene partially restored the MMS sensitivity, resulting in a 1.7- to 1.9-fold higher sensitivity to MMS compared with XRCC1(WT) and XRCC1(R194W) cells at the LD(50) value. Methyl Methanesulfonate X-ray repair cross complementing 1 Homo sapiens
7 In addition, the amount of intracellular NAD(P)H decreased in XRCC1(R280H) cells after MMS treatment. Methyl Methanesulfonate X-ray repair cross complementing 1 Homo sapiens
8 Indirect immunofluorescence staining of the XRCC1 protein showed an intense increase in the signals and clear foci of XRCC1 in the nuclei of the XRCC1(WT) cells, but a faint increase in the XRCC1(R280H) cells, after MMS exposure. Methyl Methanesulfonate X-ray repair cross complementing 1 Homo sapiens