Abstract
Aims
With three consecutive tetratricopeptide repeat (TPR) motifs at its C-terminus essential for neuronal migration, and a p23 domain at its N-terminus, DYX1C1 was the first gene proposed to have a role in developmental dyslexia. In this study, we attempted to identify the potential interaction of DYX1C1 and heat shock protein, and the role of DYX1C1 in breast cancer.
Main methods
GST pull-down, a yeast two-hybrid system, RT-PCR, site-directed mutagenesis approach.
Key findings
Our study initially confirmed DYX1C1, a dyslexia related protein, could interact with Hsp70 and Hsp90 via GST pull-down and a yeast two-hybrid system. And we verified that EEVD, the C-terminal residues of DYX1C1, is responsible for the identified association. Further, DYX1C1 mRNA was significantly overexpressed in malignant breast tumor, linking with the up-regulated expression of Hsp70 and Hsp90.
Significance
These results suggest that DYX1C1 is a novel Hsp70 and Hsp90-interacting co-chaperone protein and its expression is associated with malignancy.
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Acknowledgments
This work was supported by China national 973 funds (No. G1999055901 and No. 2009CB941701), Program for Changjiang Scholars and Innovative Research Team in University and construction of medical key discipline and talent fostering strategy. Besides, we thank generous technical assistance from Professor Sha Jiahao.
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Yuxin Chen, Muzi Zhao, Saiqun Wang contributed equally to this work.
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Chen, Y., Zhao, M., Wang, S. et al. A novel role for DYX1C1, a chaperone protein for both Hsp70 and Hsp90, in breast cancer. J Cancer Res Clin Oncol 135, 1265–1276 (2009). https://doi.org/10.1007/s00432-009-0568-6
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DOI: https://doi.org/10.1007/s00432-009-0568-6