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- W2016024462 abstract "DNA-protein cross-linkages were formed in intact nuclei of chicken erythrocytes and liver cells by the action of cis-diammine dichloroplatinum (II). Most cross-linked proteins were components of the nuclear matrix, and their heterogeneity reflected the different complexity of liver and erythrocytes matrices, respectively. Some basic proteins, including histones, were also cross-linked, particularly in erythrocyte nuclei. South-Western blotting revealed that a variety of proteins isolated from the cross-linked liver nuclei recognized DNA specifically. In this group of proteins two relatively abundant, acidic, species of 38 and 66 kDa, respectively, might represent novel DNA-binding proteins from the nuclear matrix. In the case of erythrocytes, only the basic proteins showed a DNA-recognition capacity, and among them there were some unidentified species, absent from liver. Lamin B2 was cross-linked but was unable to recognize DNA, and the same was true for other abundant, cross-linked proteins from both types of nuclei. This led to the hypothesis that for some DNA-nuclear matrix interactions the aggregation typical of matrix proteins is essential for the specificity of DNA recognition. Hybridization analysis of the DNA isolated from the cross-linked complexes showed that SARs (scaffold attachment regions) and telomeric sequences were well represented in the cross-linked fragments, that the cross-linked DNA of liver was partially different from that of erythrocytes and that two defined SAR sequences were found to be present only in the cross-linked DNA. These results are in agreement with the present views on DNA-nuclear matrix interactions, which are usually studied on isolated nuclear matrices or purified proteins. Instead, our results provide experimental evidence obtained directly from intact nuclei." @default.
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- W2016024462 date "1996-09-15" @default.
- W2016024462 modified "2023-10-09" @default.
- W2016024462 title "Comparison of DNA-protein interactions in intact nuclei from avian liver and erythrocytes: A cross-linking study" @default.
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- W2016024462 doi "https://doi.org/10.1002/(sici)1097-4644(19960915)62:4<495::aid-jcb7>3.0.co;2-h" @default.
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