Biochemistry (Moscow)

, Volume 83, Issue 1, pp 69–75 | Cite as

Interaction between RAD51 and MCM complex is essential for RAD51 foci forming in colon cancer HCT116 cells

  • Jun Huang
  • Hong-Liang Luo
  • Hua Pan
  • Cheng Qiu
  • Teng-Fei Hao
  • Zheng-Ming ZhuEmail author


Colon cancer remains one of the most common digestive system malignancies in the World. This study investigated the possible interaction between RAD51 and minichromosome maintenance proteins (MCMs) in HCT116 cells, which can serve as a model system for forming colon cancer foci. The interaction between RAD51 and MCMs was detected by mass spectrometry. Silenced MCM vectors were transfected into HTC116 cells. The expressions of RAD51 and MCMs were detected using Western blotting. Foci forming and chromatin fraction of RAD51 in HCT116 cells were also analyzed. The results showed that RAD51 directly interacted with MCM2, MCM3, MCM5, and MCM6 in colon cancer HTC116 cells. Suppression of MCM2 or MCM6 by shRNA decreased the chromatin localization of RAD51 in HTC116 cells. Moreover, silenced MCM2 or MCM6 decreased the foci forming of RAD51 in HTC116 cells. Our study suggests that the interaction between MCMs and RAD51 is essential for the chromatin localization and foci forming of RAD51 in HCT116 cell DNA damage recovery, and it may be a theoretical basis for analysis of RAD51 in tumor samples of colon cancer patients.


colon cancer HTC116 cells RAD51 MCM complex homologous recombination 



DNA double-stranded breaks


homologous recombination


minichromosome maintenance (proteins)


short hairpin RNA


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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • Jun Huang
    • 1
  • Hong-Liang Luo
    • 1
  • Hua Pan
    • 1
  • Cheng Qiu
    • 1
  • Teng-Fei Hao
    • 1
  • Zheng-Ming Zhu
    • 1
    Email author
  1. 1.Department of Gastrointestinal SurgerySecond Affiliated Hospital of Nanchang UniversityNanchangChina

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