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Article

Screening and verification of proteins that interact with HSPC238

  • Authors:
    • Jia-Yu Tan
    • Jing-Lin Chen
    • Xiang Huang
    • Chun-Lei Yuan
  • View Affiliations / Copyright

    Affiliations: Central Intensive Care Unit, Bo'ai Hospital of Zhongshan City Affiliated with Southern Medical University, Zhongshan 528403, P.R. China, Prenatal Diagnosis Center, Bo'ai Hospital of Zhongshan City Affiliated with Southern Medical University, Zhongshan 528403, P.R. China, Department of Laboratory Medicine, Bo'ai Hospital of Zhongshan City Affiliated with Southern Medical University, Zhongshan 528403, P.R. China
  • Pages: 3097-3103
    |
    Published online on: September 18, 2015
       https://doi.org/10.3892/or.2015.4289
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Abstract

HSPC238 is a recently identified tumor suppressor and demonstrates ubiquitin ligase E3 enzyme activity. HSPC238 was found to be significantly downregulated in human hepatocellular carcinoma (HCC) in vivo and to inhibit the proliferation and invasion of hepatoma cells in vitro; however, the underlying molecular mechanism is largely unknown. In the present study, we screened for and identified proteins that physically interact with HSPC238. A bait vector for yeast two-hybrid was constructed with human HSPC238 gene cDNA. Yeast two-hybrid screening was performed using a human fetal liver cDNA library. Multiple reporter gene assays, DNA sequencing and BLAST comparison analysis were performed on positive clones. Protein interaction of screened candidates with HSPC238 was further validated by confocal microscopy, co-immunoprecipitation and pull-down assays. Yeast two-hybrid screening demonstrated 124 positive clones. Multiple reporter gene assays with LacZ, HIS and ADE2 selective media identified 12 genes. Further co-localization, co-immunoprecipitation and pull-down assays demonstrated that HMOX1, RPS27A, ubiquitinB and MT2A interacted with HSPC238. These four proteins are involved in tumor development and progression, and are associated with the ubiquitin-proteasome pathway. Our results suggest that HSPC238 may play a tumor suppressor role and interact with these proteins via the ubiquitin-proteasome pathway. The identification and validation of proteins interacting with HSP238 may lead to the discovery of novel mechanisms through which HSPC238 suppresses tumorigenesis in human hepatocellular carcinoma.
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Copy and paste a formatted citation
Spandidos Publications style
Tan J, Chen J, Huang X and Yuan C: Screening and verification of proteins that interact with HSPC238. Oncol Rep 34: 3097-3103, 2015.
APA
Tan, J., Chen, J., Huang, X., & Yuan, C. (2015). Screening and verification of proteins that interact with HSPC238. Oncology Reports, 34, 3097-3103. https://doi.org/10.3892/or.2015.4289
MLA
Tan, J., Chen, J., Huang, X., Yuan, C."Screening and verification of proteins that interact with HSPC238". Oncology Reports 34.6 (2015): 3097-3103.
Chicago
Tan, J., Chen, J., Huang, X., Yuan, C."Screening and verification of proteins that interact with HSPC238". Oncology Reports 34, no. 6 (2015): 3097-3103. https://doi.org/10.3892/or.2015.4289
Copy and paste a formatted citation
x
Spandidos Publications style
Tan J, Chen J, Huang X and Yuan C: Screening and verification of proteins that interact with HSPC238. Oncol Rep 34: 3097-3103, 2015.
APA
Tan, J., Chen, J., Huang, X., & Yuan, C. (2015). Screening and verification of proteins that interact with HSPC238. Oncology Reports, 34, 3097-3103. https://doi.org/10.3892/or.2015.4289
MLA
Tan, J., Chen, J., Huang, X., Yuan, C."Screening and verification of proteins that interact with HSPC238". Oncology Reports 34.6 (2015): 3097-3103.
Chicago
Tan, J., Chen, J., Huang, X., Yuan, C."Screening and verification of proteins that interact with HSPC238". Oncology Reports 34, no. 6 (2015): 3097-3103. https://doi.org/10.3892/or.2015.4289
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