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Article

Translocation of HSP27 into liver cancer cell nucleus may be associated with phosphorylation and O-GlcNAc glycosylation

  • Authors:
    • Kun Guo
    • Lin Gan
    • Shu Zhang
    • Feng Jie Cui
    • Wang Cun
    • Yan Li
    • Nan Xiao Kang
    • Mei Dong Gao
    • Kun Yin Liu
  • View Affiliations / Copyright

    Affiliations: Liver Cancer Institute, Zhongshan Hospital, Fudan University, Shanghai 200032, P.R. China, Research Center for Cancer, Institute of Biomedical Science, Fudan University, Shanghai 200032, P.R. China
  • Pages: 494-500
    |
    Published online on: June 1, 2012
       https://doi.org/10.3892/or.2012.1844
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Abstract

It has been reported that the dynamic interplay between O-GlcNAcylation and O-phosphorylation is responsible for altering the activity or localization of heat-shock proteins. The aim of this study was to determine whether dynamic interplay between O-GlcNAcylation and O-phosphorylation of HSP27 in hepatocellular cancer (HCC) cells affect its entry into the nucleus. We demonstrate that the entry of HSP27 into the nucleus correlated with its phosphorylation through transfecting HCC cells with plasmids coding for wild-type HSP27 (HSP27-WT), its non-phosphorylatable (HSP27-3A) and pseudophosphorylated (HSP27-3D) mutants, however, not all of the endogenous or exogenous nuclear HSP27 was modified by phosphorylation. We observed that HSP27 was modified with O-GlcNAc glycosylation in HCC cells and report that at conserved Ser residues of HSP27, alternative phosphorylation and O-GlcNAc modification can be predicted by the YinOYang 1.2 method. Furthermore, after P79350 or combined SB203580 and PUGNAc treatment, increased nuclear import of HSP27-WT and HSP27-3D implied that the entry of HSP27 into the nucleus was not only correlated with phosphorylation, but also with O-GlcNAc glycosylation. Collectively, O-GlcNAcylation of HSP27 in HCC cells may be a novel regulatory mode of HSP27 function, particularly for its entry into the nucleus. Crosstalk or interplay between glycosylation and phosphorylation of HSP27 could regulate its subcellular localization and biological functions in liver cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Guo K, Gan L, Zhang S, Cui FJ, Cun W, Li Y, Kang NX, Gao MD and Liu KY: Translocation of HSP27 into liver cancer cell nucleus may be associated with phosphorylation and O-GlcNAc glycosylation. Oncol Rep 28: 494-500, 2012.
APA
Guo, K., Gan, L., Zhang, S., Cui, F.J., Cun, W., Li, Y. ... Liu, K.Y. (2012). Translocation of HSP27 into liver cancer cell nucleus may be associated with phosphorylation and O-GlcNAc glycosylation. Oncology Reports, 28, 494-500. https://doi.org/10.3892/or.2012.1844
MLA
Guo, K., Gan, L., Zhang, S., Cui, F. J., Cun, W., Li, Y., Kang, N. X., Gao, M. D., Liu, K. Y."Translocation of HSP27 into liver cancer cell nucleus may be associated with phosphorylation and O-GlcNAc glycosylation". Oncology Reports 28.2 (2012): 494-500.
Chicago
Guo, K., Gan, L., Zhang, S., Cui, F. J., Cun, W., Li, Y., Kang, N. X., Gao, M. D., Liu, K. Y."Translocation of HSP27 into liver cancer cell nucleus may be associated with phosphorylation and O-GlcNAc glycosylation". Oncology Reports 28, no. 2 (2012): 494-500. https://doi.org/10.3892/or.2012.1844
Copy and paste a formatted citation
x
Spandidos Publications style
Guo K, Gan L, Zhang S, Cui FJ, Cun W, Li Y, Kang NX, Gao MD and Liu KY: Translocation of HSP27 into liver cancer cell nucleus may be associated with phosphorylation and O-GlcNAc glycosylation. Oncol Rep 28: 494-500, 2012.
APA
Guo, K., Gan, L., Zhang, S., Cui, F.J., Cun, W., Li, Y. ... Liu, K.Y. (2012). Translocation of HSP27 into liver cancer cell nucleus may be associated with phosphorylation and O-GlcNAc glycosylation. Oncology Reports, 28, 494-500. https://doi.org/10.3892/or.2012.1844
MLA
Guo, K., Gan, L., Zhang, S., Cui, F. J., Cun, W., Li, Y., Kang, N. X., Gao, M. D., Liu, K. Y."Translocation of HSP27 into liver cancer cell nucleus may be associated with phosphorylation and O-GlcNAc glycosylation". Oncology Reports 28.2 (2012): 494-500.
Chicago
Guo, K., Gan, L., Zhang, S., Cui, F. J., Cun, W., Li, Y., Kang, N. X., Gao, M. D., Liu, K. Y."Translocation of HSP27 into liver cancer cell nucleus may be associated with phosphorylation and O-GlcNAc glycosylation". Oncology Reports 28, no. 2 (2012): 494-500. https://doi.org/10.3892/or.2012.1844
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