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Cell Struct Funct. 2005 Feb;29(5-6):159-64.

Class-specific binding of two aminoacyl-tRNA synthetases to annexin, a Ca2+- and phospholipid-binding protein.

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  • 1Graduate School of Science, Biological Science, Osaka University, Japan.

Abstract

Annexins are a family of Ca2+/phospholipid-binding proteins that have diverse functions. To understand the function of annexin in Physarum polycephalum, we searched for its binding proteins. Here we demonstrate the presence of two novel annexin-binding proteins. The homology search of partial amino acid sequences of these two proteins identified them as aminoacyl-tRNA synthetases (ARSs). Furthermore, antibody against aminoacyl-tRNA synthetases cross-reacted with one of two proteins. Our results imply the interaction between intracellular membrane dynamics and protein translation system, and may give a clue to understand the mechanism of some myositis diseases, which have been known to produce autoantibodies against ARSs.

PMID:
15840947
[PubMed - indexed for MEDLINE]
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