Junction resolving enzymes use multivalency to keep the Holliday junction dynamic
نویسندگان
چکیده
منابع مشابه
Characterization of a Holliday junction-resolving enzyme from Schizosaccharomyces pombe.
The rearrangement and repair of DNA by homologous recombination involves the creation of Holliday junctions, which are cleaved by a class of junction-specific endonucleases to generate recombinant duplex DNA products. Only two cellular junction-resolving enzymes have been identified to date: RuvC in eubacteria and CCE1 from Saccharomyces cerevisiae mitochondria. We have identified a protein fro...
متن کاملHolliday junction resolvases.
Four-way DNA intermediates, called Holliday junctions (HJs), can form during meiotic and mitotic recombination, and their removal is crucial for chromosome segregation. A group of ubiquitous and highly specialized structure-selective endonucleases catalyze the cleavage of HJs into two disconnected DNA duplexes in a reaction called HJ resolution. These enzymes, called HJ resolvases, have been id...
متن کاملHolliday junction trap shows how cells use recombination and a junction-guardian role of RecQ helicase
DNA repair by homologous recombination (HR) underpins cell survival and fuels genome instability, cancer, and evolution. However, the main kinds and sources of DNA damage repaired by HR in somatic cells and the roles of important HR proteins remain elusive. We present engineered proteins that trap, map, and quantify Holliday junctions (HJs), a central DNA intermediate in HR, based on catalytica...
متن کاملCharacterization of the Holliday Junction Resolving Enzyme Encoded by the Bacillus subtilis Bacteriophage SPP1
Recombination-dependent DNA replication, which is a central component of viral replication restart, is poorly understood in Firmicutes bacteriophages. Phage SPP1 initiates unidirectional theta DNA replication from a discrete replication origin (oriL), and when replication progresses, the fork might stall by the binding of the origin binding protein G38P to the late replication origin (oriR). Re...
متن کاملSubstrate recognition and catalysis by the Holliday junction resolving enzyme Hje.
Two archaeal Holliday junction resolving enzymes, Holliday junction cleavage (Hjc) and Holliday junction endonuclease (Hje), have been characterized. Both are members of a nuclease superfamily that includes the type II restriction enzymes, although their DNA cleaving activity is highly specific for four-way junction structure and not nucleic acid sequence. Despite 28% sequence identity, Hje and...
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ژورنال
عنوان ژورنال: Nature Chemical Biology
سال: 2019
ISSN: 1552-4450,1552-4469
DOI: 10.1038/s41589-018-0209-y