Acta Biochimica et Biophysica Sinica Advance Access originally published online on September 6, 2009
Acta Biochimica et Biophysica Sinica 2009 41(10):816-821; doi:10.1093/abbs/gmp074
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Identification of FANCA as a protein interacting with centromere-associated protein E


1 Department of Biochemistry and Molecular Biology, Anhui Medical University, Hefei 230032, China
2 Department of Anaesthesiology, the First Affiliated Hospital of Anhui Medical University, Hefei 230032, China
3 Department of Microbiology and Parasitology, Provincial Key Laboratory of Genomic Research, Anhui Medical University, Hefei 230032, China
* Correspondence address. Tel: +86-551-5161131; Fax: +86-551-5161131; E-mail: dudu{at}mail.ustc.edu.cn
| Abstract |
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This study sought to isolate and identify proteins that interact with centromere-associated protein E (CENP-E), provide new clues for exploring the function of CENP-E in cell cycle control and the pathogenesis of tumor. Yeast two-hybrid screen and regular molecular biologic techniques were undertaken to screen human HeLa cDNA library with the kinetochore binding domain of CENP-E. The bait from the C-terminus of CENP-E was created by subcloning methods to find out optimal candidate proteins that interact with the kinetochore binding domain of CENP-E. Eight novel CENP-E interacting proteins including Homo sapiens Fanconi anemia complementation group A (FANCA) were obtained. In yeast two-hybrid assay, the N-terminal 260 amino acids of FANCA were found to be necessary and sufficient for the interaction with the C-terminus of CENP-E. The interaction was confirmed by in vitro glutathione S-transferase pull-down assay and in vivo co-immunoprecipitation assay. Our finding of the interaction of CENP-E with FANCA demonstrates that CENP-E and FANCA may play important roles in the functional regulation of the mitotic checkpoint signal pathway.
Keywords Fanconi anemia complementation group A (FANCA); centromere-associated protein E; yeast two-hybrid; protein interaction
Received: March 21, 2009; Accepted: June 8, 2009
These authors contributed equally to this work.