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Open AccessJournal ArticleDOI

The Role of the Rad55–Rad57 Complex in DNA Repair

Upasana Roy, +1 more
- 08 Sep 2021 - 
- Vol. 12, Iss: 9, pp 1390
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TLDR
In this paper, the Rad51 paralogs play a crucial role in regulating proper levels of homologous recombination, and mutations in the human counterparts have been associated with diseases such as cancer and Fanconi Anemia.
Abstract
Homologous recombination (HR) is a mechanism conserved from bacteria to humans essential for the accurate repair of DNA double-stranded breaks, and maintenance of genome integrity. In eukaryotes, the key DNA transactions in HR are catalyzed by the Rad51 recombinase, assisted by a host of regulatory factors including mediators such as Rad52 and Rad51 paralogs. Rad51 paralogs play a crucial role in regulating proper levels of HR, and mutations in the human counterparts have been associated with diseases such as cancer and Fanconi Anemia. In this review, we focus on the Saccharomyces cerevisiae Rad51 paralog complex Rad55–Rad57, which has served as a model for understanding the conserved role of Rad51 paralogs in higher eukaryotes. Here, we discuss the results from early genetic studies, biochemical assays, and new single-molecule observations that have together contributed to our current understanding of the molecular role of Rad55–Rad57 in HR.

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Journal ArticleDOI

Reparative properties of human glioblastoma cells after single exposure to a wide range of X-ray doses

TL;DR: It is demonstrated that the GO1 culture derived from glioblastoma cells from Patient G, who had previously been irradiated, proved to be less sensitive to radiation than the Sus\fP2 gliOBlastoma culture was from Patient S, which had not been exposed to radiation before.
References
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Book ChapterDOI

Some factors in the interpretation of protein denaturation.

TL;DR: The chapter reviews that the denaturation is a process in which the spatial arrangement of the polypeptide chains within the molecule is changed from that typical of the native protein to a more disordered arrangement.
Journal ArticleDOI

Mechanism of eukaryotic homologous recombination.

TL;DR: HR accessory factors that facilitate other stages of the Rad51- and Dmc1-catalyzed homologous DNA pairing and strand exchange reaction have also been identified.
Journal ArticleDOI

Choreography of the DNA damage response: Spatiotemporal relationships among checkpoint and repair proteins

TL;DR: The cellular response to DSBs and DNA replication stress is likely directed by the Mre11 complex detecting and processing DNA ends in conjunction with Sae2 and by RP-A recognizing single-stranded DNA and recruiting additional checkpoint and repair proteins.
Journal ArticleDOI

Catalysis of ATP-dependent homologous DNA pairing and strand exchange by yeast RAD51 protein

TL;DR: The RAD51 gene of Saccharomyces cerevisiae is required for genetic recombination and DNA double-strand break repair and it is demonstrated that RAD51 protein pairs circular viral single-stranded DNA from phi X 174 or M13 with its respective homologous linear double-Stranded form, indicating that RAD 51 can catalyze strand exchange.
Journal ArticleDOI

Mitotic checkpoint genes in budding yeast and the dependence of mitosis on DNA replication and repair.

TL;DR: It is concluded that the checkpoint in budding yeast consists of overlapping S-phase and G2-phase pathways that respond to incomplete DNA replication and/or DNA damage and cause arret of cells before mitosis.
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