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- W2600254018 endingPage "1297" @default.
- W2600254018 startingPage "1279" @default.
- W2600254018 abstract "Abstract The retinoblastoma protein (Rb), which typically functions as a transcriptional repressor of E2F‐regulated genes, represents a major control hub of the cell cycle. Here, we show that loss of the Arabidopsis Rb homolog RETINOBLASTOMA ‐ RELATED 1 ( RBR 1) leads to cell death, especially upon exposure to genotoxic drugs such as the environmental toxin aluminum. While cell death can be suppressed by reduced cell‐proliferation rates, rbr1 mutant cells exhibit elevated levels of DNA lesions, indicating a direct role of RBR 1 in the DNA ‐damage response ( DDR ). Consistent with its role as a transcriptional repressor, we find that RBR 1 directly binds to and represses key DDR genes such as RADIATION SENSITIVE 51 ( RAD 51), leaving it unclear why rbr1 mutants are hypersensitive to DNA damage. However, we find that RBR 1 is also required for RAD 51 localization to DNA lesions. We further show that RBR 1 is itself targeted to DNA break sites in a CDKB 1 activity‐dependent manner and partially co‐localizes with RAD 51 at damage sites. Taken together, these results implicate RBR 1 in the assembly of DNA ‐bound repair complexes, in addition to its canonical function as a transcriptional regulator." @default.
- W2600254018 created "2017-04-07" @default.
- W2600254018 creator A5015168350 @default.
- W2600254018 creator A5017553414 @default.
- W2600254018 creator A5036347122 @default.
- W2600254018 creator A5041540725 @default.
- W2600254018 creator A5071386076 @default.
- W2600254018 creator A5082418737 @default.
- W2600254018 creator A5084006202 @default.
- W2600254018 date "2017-03-20" @default.
- W2600254018 modified "2023-10-16" @default.
- W2600254018 title "The retinoblastoma homolog <scp>RBR</scp>1 mediates localization of the repair protein <scp>RAD</scp>51 to <scp>DNA</scp> lesions in <i>Arabidopsis</i>" @default.
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