|
|
|
| Registros recuperados: 23 | |
|
|
| Hogrel, Gaelle; Lu, Yang; Alexandre, Nicolas; Bossé, Audrey; Dulermo, Remi; Ishino, Sonoko; Ishino, Yoshizumi; Flament, Didier. |
| Among the three domains of life, the process of homologous recombination (HR) plays a central role in the repair of double-strand DNA breaks and the restart of stalled replication forks. Curiously, main protein actors involved in the HR process appear to be essential for hyperthermophilic Archaea raising interesting questions about the role of HR in replication and repair strategies of those Archaea living in extreme conditions. One key actor of this process is the recombinase RadA, which allows the homologous strand search and provides a DNA substrate required for following DNA synthesis and restoring genetic information. DNA polymerase operation after the strand exchange step is unclear in Archaea. Working with Pyrococcus abyssi proteins, here we show... |
| Tipo: Text |
Palavras-chave: Homologous recombination; Archaea; DNA polymerase; Recombinase; DNA repair. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00641/75274/75539.pdf |
| |
|
|
| Ren, Bin; Kuehn, Joelle; Meslet-cladiere, Laurence; Briffotaux, Julien; Norais, Cedric; Lavigne, Regis; Flament, Didier; Ladenstein, Rudolf; Myllykallio, Hannu. |
| We show that Pyrococcus abyssi PAB2263 (dubbed NucS (nuclease for ss DNA) is a novel archaeal endonuclease that interacts with the replication clamp PCNA. Structural determination of P. abyssi NucS revealed a two-domain dumbbell-like structure that in overall does not resemble any known protein structure. Biochemical and structural studies indicate that NucS orthologues use a non-catalytic ssDNA-binding domain to regulate the cleavage activity at another site, thus resulting into the specific cleavage at double-stranded DNA (dsDNA)/ssDNA junctions on branched DNA substrates. Both 3' and 5' extremities of the ssDNA can be cleaved at the nuclease channel that is too narrow to accommodate duplex DNA. Altogether, our data suggest that NucS proteins constitute... |
| Tipo: Text |
Palavras-chave: Structure function studies; RecB family; Novel endonuclease; DNA repair; Branched DNA structures. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6807.pdf |
| |
|
|
| BAPTISTA,FRANCIELLE; AVEZUM ALVES DE CASTRO-PRADO,MARIALBA. |
| The participation of the recently described uvsZ1 mutation in checkpoint control and the identification of epistatic relations between uvsZ1 mutation and uvsD153 and uvsJ1 mutations are provided. The effect of mutation uvsZ1 in mitotic exchanges into paba-bi (chromosome I) and cho-nic (chromosome VII) genetic intervals has also been evaluated. The mutation uvsZ1 was epistatic with regard to uvsD153 and uvsJ1 mutations, with no involvement with checkpoint control. In contrast to mutations in UvsB and UvsF groups, the uvsZ1 mutation failed to cause any changes in the frequencies of mitotic crossing-over. The distinct phenotypic traits given by mutation uvsZ1 suggest the presence of complex interactions among the different DNA repair pathways. Interaction may... |
| Tipo: Journal article |
Palavras-chave: Checkpoint pathways; DNA repair; Uvs mutations. |
| Ano: 2002 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602002000300018 |
| |
| Registros recuperados: 23 | |
|
|
|
