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• W2104506789 abstract "The heterogeneous nuclear ribonucleoprotein (hnRNP) A2 is a multi-tasking protein that acts in the cytoplasm and nucleus. We have explored the possibility that this protein is associated with telomeres and participates in their maintenance. Rat brain hnRNP A2 was shown to have two nucleic acid binding sites. In the presence of heparin one site binds single-stranded oligodeoxyribonucleotides irrespective of sequence but not the corresponding oligoribonucleotides. Both the hnRNP A2-binding cis-acting element for the cytoplasmic RNA trafficking element, A2RE, and the ssDNA telomere repeat match a consensus sequence for binding to a second sequence-specific site identified by mutational analysis. hnRNP A2 protected the telomeric repeat sequence, but not the complementary sequence, against DNase digestion: the glycine-rich domain was found to be necessary, but not sufficient, for protection. The N-terminal RRM (RNA recognition motif) and tandem RRMs of hnRNP A2 also bind the single-stranded, template-containing segment of telomerase RNA. hnRNP A2 colocalizes with telomeric chromatin in the subset of PML bodies that are a hallmark of ALT cells, reinforcing the evidence for hnRNPs having a role in telomere maintenance. Our results support a model in which hnRNP A2 acts as a molecular adapter between single-stranded telomeric repeats, or telomerase RNA, and another segment of ssDNA." @default.
• W2104506789 created "2016-06-24" @default.
• W2104506789 creator A5064419411 @default.
• W2104506789 date "2005-01-19" @default.
• W2104506789 modified "2023-09-30" @default.
• W2104506789 title "hnRNP A2, a potential ssDNA/RNA molecular adapter at the telomere" @default.
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• W2104506789 doi "https://doi.org/10.1093/nar/gki203" @default.
• W2104506789 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/548348" @default.
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