Identification and characterization of a centrosomal protein, FOR20 as a novel S100A6 target.

Kyohei Sakane, Miyu Nishiguchi, Miwako Denda, Fuminori Yamagchi, Masaki Magari, Naoki Kanayama, Ryo Morishita, Hiroshi Tokumitsu

Biochemical and biophysical research communications 2017 Sep 30

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S100A6 is a Ca2+-signal transducer that interacts with numerous proteins and regulates their biochemical functions. Here we identified a centrosomal protein, FOR20 (FOP-related protein of 20 kDa) as a novel S100A6 target by screening protein microarrays carrying 19,676 recombinant GST-fused human proteins. Binding experiments revealed that S100A6 interacts with the N-terminal region (residues 1-30) of FOR20 in a Ca2+-dependent manner in vitro and in living cells. Several S100 proteins including S100A1, A2, A4, A11, B also exhibited Ca2+-dependent interactions with FOR20 as well as S100A6. We found that two distantly related centrosomal proteins, FOP and OFD1, also possess N-terminal regions with a significant sequence similarity to the putative S100A6-binding site (residues 1-30) in FOR20 and are capable of binding to S100A6 in a Ca2+-dependent manner. Taken together, these results may indicate that S100A6 interacts with FOR20 and related centrosomal proteins through a conserved N-terminal domain, suggesting a novel Ca2+-dependent regulation of centrosomal function. Copyright © 2017 Elsevier Inc. All rights reserved.

Citation

Kyohei Sakane, Miyu Nishiguchi, Miwako Denda, Fuminori Yamagchi, Masaki Magari, Naoki Kanayama, Ryo Morishita, Hiroshi Tokumitsu. Identification and characterization of a centrosomal protein, FOR20 as a novel S100A6 target. Biochemical and biophysical research communications. 2017 Sep 30;491(4):980-985