What enzyme resolves Holliday junction?
What enzyme resolves Holliday junction?
But the functional junction-resolving enzyme is the SLX1-SLX4-MUS81-EME1 complex.
Which proteins function in the resolution of Holliday junctions?
RuvC is a dimeric protein that promotes HJ resolution by introducing a pair of symmetrically related nicks in two strands that lie diametrically opposed across the junction point.
What are the two possible resolutions of a Holliday junction?
Cleavage, or resolution, of the Holliday junction can occur in two ways. Cleavage of the original set of strands leads to two molecules that may show gene conversion but not chromosomal crossover, while cleavage of the other set of two strands causes the resulting recombinant molecules to show crossover.
What is Holliday structure?
Holliday junction, cross-shaped structure that forms during the process of genetic recombination, when two double-stranded DNA molecules become separated into four strands in order to exchange segments of genetic information.
What is Holliday junction resolution?
Holliday junction (HJ) resolution is essential for chromosome segregation at meiosis and the repair of stalled/collapsed replication forks in mitotic cells. All organisms possess nucleases that promote HJ resolution by the introduction of symmetrically related nicks in two strands at, or close to, the junction point.
How is Holliday junction resolved specifically in bacteria?
The Holliday junction is an essential intermediate of homologous recombination. These proteins play a pivotal role in the formation of Holliday junctions from two homologous DNA duplexes. RuvC is a specific endonuclease that resolves Holliday junctions in Bacteria.
What are the potential results of the resolution of Holliday intermediates?
Resolution of the intermediate can generate COs (cleavage in orientations a and d or b and c) or NCOs (cleavage in orientations a and c or b and d). (Right) Single-end invasion involves one DNA end, which could be generated by cleavage of a stalled replication fork.
What does the resolution of Holliday junctions mean?
What is Holliday model of recombination?
The Holliday model for homologous recombination Single-strand nicks are introduced at the same position on both parental molecules. The nicked strands then exchange by complementary base pairing, and ligation produces a crossed-strand intermediate called a Holliday junction.
What is resolution in Holliday model?
Resolution of the Holliday structure The Holliday structure can be resolved by cutting and ligating either the two originally exchanged strands (Figure 19-9f, left) or the originally unexchanged strands (Figure 19-9f, right).
