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Interaction between p12CDK2AP1 and a novel unnamed protein product inhibits cell proliferation by regulating the cell

Lijun Liu1, Xiangming Yang, Qianwei Ni

  • 1Department of Oral and Maxillofacial Surgery, School of Stomatology, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China.

Molecular Medicine Reports
|November 20, 2013
PubMed

Insights

Researchers identified a novel protein that interacts with human p12CDK2AP1 (cyclin-dependent kinase 2-associated protein 1). This interaction suppresses cell proliferation and may offer new cancer therapeutic targets.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Oncology

Background:

  • p12CDK2AP1 (cyclin-dependent kinase 2-associated protein 1) is a protein that suppresses cell growth, differentiation, and angiogenesis in various carcinomas.
  • Its functions are primarily mediated through protein-protein interactions, highlighting the need to identify interacting partners to understand its role in cell cycle regulation and carcinogenesis.

Purpose of the Study:

  • To identify novel proteins that interact with human p12CDK2AP1.
  • To characterize the functional role of a newly identified interacting protein in cell cycle regulation and tumor growth.

Main Methods:

  • Yeast two-hybrid system for initial protein interaction screening.
  • Glutathione S-transferase pull-down and co-immunoprecipitation assays for in vitro interaction verification.
  • Quantitative PCR (qPCR), cell cycle analysis via flow cytometry, and in vivo tumor xenograft models in Balb/c nude mice.

Main Results:

  • A novel unnamed protein product (UPP, BC006130) was identified as a p12CDK2AP1-interacting protein.
  • UPP expression levels are regulated by the CDK2AP1 gene, and UPP overexpression shortens the G2/M phase of the cell cycle.
  • In vivo studies demonstrated that UPP gene transfection inhibits tumor cell proliferation.

Conclusions:

  • A novel p12CDK2AP1-interacting protein (UPP) was identified and characterized.
  • This novel protein may inhibit cell proliferation by mediating the cell cycle, expanding the understanding of p12CDK2AP1 mechanisms.
  • The identified protein represents a potential cancer therapeutic target.

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