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Elg1 forms an alternative PCNA-interacting RFC complex required to maintain genome stability
Pamela Kanellis1, Roger Agyei, Daniel Durocher
1Samuel Lunenfeld Research Institute, Mount Sinai Hospital, 600 University Avenue, Toronto, Ontario M5G 1X5, Canada.
Current Biology : CB
|September 19, 2003
Summary
Elg1 forms a novel RFC-like complex crucial for genome stability. Defects in this complex lead to genome instability by impairing Okazaki fragment maturation during DNA replication.
Area of Science:
- Molecular Biology
- Genetics
- Cancer Research
Background:
- Genome instability is a key feature of cancer, driving tumor progression.
- Mechanisms maintaining genome stability are not fully understood.
Purpose of the Study:
- To identify genes that suppress gross chromosomal rearrangements (GCRs) in yeast.
- To elucidate the function of the uncharacterized gene Elg1 in maintaining genome stability.
Main Methods:
- Screening for GCR suppressors in budding yeast.
- Investigating gene function through physical and genetic interactions.
- Analyzing roles in DNA replication and checkpoint activation.
Main Results:
- Elg1, a homolog of RFC subunits, suppresses GCRs.
- Elg1 forms a novel RFC-like complex conserved in yeast and human cells.
- Elg1 is essential for S phase progression, telomere homeostasis, and Okazaki fragment maturation.
- Elg1 functions with other RFC-like proteins in replication stress response.
Conclusions:
- Elg1 forms a novel, conserved alternative RFC complex.
- Elg1 deficiency causes genome instability due to defects in Okazaki fragment maturation.