Suppression of gross chromosomal rearrangements by a new alternative replication factor C complex.
Defects in DNA replication fidelity lead to genomic instability. Gross chromosomal rearrangement (GCR), a type of genomic instability, is highly enhanced by various initial mutations affecting DNA replication. Frequent observations of GCRs in many cancers strongly argue the importance of maintaining high fidelity of DNA replication to suppress carcinogenesis. Recent genome wide screens in Saccharomyces cerevisiae identified a new GCR suppressor gene, ELG1, enhanced level of genome instability gene 1. Its physical interaction with proliferating cell nuclear antigen (PCNA) and complex formation with Rfc2-5p proteins suggest that Elg1 functions to load/unload PCNA onto DNA during a certain DNA metabolism. High level of DNA damage accumulation and enhanced phenotypes with mutations in genes involved in cell cycle checkpoints, homologous recombination (HR), or chromatin assembly in the elg1 strain suggest that Elg1p-Rfc2-5p functions in a fundamental DNA metabolism to suppress genomic instability.
Banerjee
Soma
S
Genome Instability Section, Genetics and Molecular Biology Branch, National Human Genome Research Institute, National Institutes of Health, 49 Convent Drive, Room 4A22, Bethesda, MD 20892, USA.
Sikdar
Nilabja
N
Myung
Kyungjae
K
D000818:Animals; D002352:Carrier Proteins / Q000737:chemistry; D002869:Chromosome Aberrations; D002875:Chromosomes / Q000648:ultrastructure; D004261:DNA Replication; D005399:Fishes; D006801:Humans; D051379:Mice; D008957:Models, Genetic; D018809:Proliferating Cell Nuclear Antigen / Q000737:chemistry; D051381:Rats; D011995:Recombination, Genetic; D051818:Replication Protein C / Q000737:chemistry* / Q000378:metabolism; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000378:metabolism; D029701:Saccharomyces cerevisiae Proteins
D002352:Carrier Proteins; C477609:Elg1 protein, S cerevisiae; D018809:Proliferating Cell Nuclear Antigen; D029701:Saccharomyces cerevisiae Proteins; D051818:Replication Protein C
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