Related Experiment Video

Updated: Nov 18, 2025

Strand-Specific Analysis of Proteins at Replicating DNA Strands by Enrichment and Sequencing of Protein-Associated Nascent DNA Method
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Strand-Specific Analysis of Proteins at Replicating DNA Strands by Enrichment and Sequencing of Protein-Associated Nascent DNA Method

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Roles of SDE2 and TIMELESS at active and stalled DNA replication forks

Natalie Lo1, Julie Rageul1, Hyungjin Kim1,2

  • 1Department of Pharmacological Sciences, The State University of New York at Stony Brook, Stony Brook, NY, USA.

Molecular & Cellular Oncology
|February 8, 2021
PubMed

Insights

The fork protection complex (FPC) ensures DNA replication proceeds smoothly. SDE2 and TIMELESS (TIM) protect stalled replication forks from degradation, maintaining genome stability.

Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • The fork protection complex (FPC), composed of TIMELESS (TIM)-TIPIN, scaffolds the replisome for DNA replication.
  • Replication stress can compromise fork integrity and lead to genomic instability.
  • SDE2 is a known regulator of DNA replication stress.

Purpose of the Study:

  • To investigate the role of SDE2 in maintaining fork protection complex (FPC) integrity.
  • To elucidate the mechanism by which SDE2 and TIMELESS (TIM) protect stalled replication forks.

Main Methods:

  • The study likely involved molecular biology techniques such as protein interaction assays, Western blotting, and potentially in vitro or in vivo replication fork stability assays.
  • Investigated the interaction between SDE2, TIMELESS (TIM), and other replication fork components.

Main Results:

  • SDE2 was found to maintain the integrity of the fork protection complex (FPC).
  • SDE2, in conjunction with TIMELESS (TIM), actively protects stalled replication forks against nucleolytic degradation.

Conclusions:

  • SDE2 is a crucial component in the cellular response to replication stress.
  • The SDE2-TIM interaction provides a protective mechanism for stalled replication forks, preventing degradation and promoting genome stability.
Keywords:
BRCA1/BRCA2DNA replication stressGenome instabilitySDE2TIMELESSfork protection complex

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