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Related Experiment Video

Updated: Jun 27, 2026

A Method to Study de novo Formation of Chromatin Domains
07:34

A Method to Study de novo Formation of Chromatin Domains

Published on: August 23, 2019

[E2F1 upregulates endogenous XRCC1 expression].

Juan Li1, Ying Shi, Hai-Ying Li

  • 1Bejiing Youan Hospital Affiliated to Capital Medical University, Beijing 100069, China.

Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi = Zhonghua Shiyan He Linchuang Bingduxue Zazhi = Chinese Journal of Experimental and Clinical Virology
|November 27, 2008
PubMed
Summary

Transcription factor E2F1 upregulates X-ray repair cross-complementing 1 (XRCC1) expression by stimulating its promoter. This study clarifies the regulatory role of E2F1 in XRCC1 gene expression.

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Published on: May 7, 2018

Area of Science:

  • Molecular Biology
  • Genetics
  • DNA Repair

Background:

  • X-ray repair cross-complementing 1 (XRCC1) is crucial for DNA single-strand break repair.
  • Transcription factors play a key role in regulating DNA repair gene expression.

Purpose of the Study:

  • To investigate the regulatory effect of transcription factor E2F1 on XRCC1.
  • To determine the significance of E2F1 in controlling XRCC1 expression.

Main Methods:

  • Saos2 cells were transfected with E2F1 expression vectors.
  • XRCC1 promoter-luciferase reporter assays were performed.
  • Luciferase activity was measured to assess promoter activation.

Main Results:

  • E2F1 expression dose-dependently increased XRCC1 promoter activity.
  • A non-DNA binding mutant of E2F1 failed to activate the XRCC1 promoter.
  • E2F1 enhances endogenous XRCC1 expression.

Conclusions:

  • E2F1 acts as a positive regulator of XRCC1.
  • E2F1 stimulates the XRCC1 promoter, upregulating gene expression.
  • This highlights a novel regulatory mechanism in DNA repair pathways.