Isoform‐Selective Fluorescent Labeling of 14‐3‐3σ by Acrylamide‐Containing Fusicoccins

  • Kenta Tanaka
    Academic Assembly Institute of Agriculture Shinshu University 8304 Minami-Minowa, Kami-Ina Nagano 399-4598 Japan
  • Yoshiya Hatano
    Academic Assembly Institute of Agriculture Shinshu University 8304 Minami-Minowa, Kami-Ina Nagano 399-4598 Japan
  • Junko Ohkanda
    Academic Assembly Institute of Agriculture Shinshu University 8304 Minami-Minowa, Kami-Ina Nagano 399-4598 Japan

抄録

<jats:title>Abstract</jats:title><jats:p>The 14‐3‐3 family of proteins is central to the regulation of signaling pathways driven by serine/threonine kinases. In humans, 14‐3‐3 consists of seven highly conserved isoforms, yet the function of each isoform remains to be fully elucidated. Synthetic agents capable of isoform‐specific fluorescent labeling of 14‐3‐3 would provide a useful tool for studying in depth the biological roles of isoforms. In this study, the 14‐3‐3σ isoform was evaluated, which possesses a unique Cys38, and a natural product‐based fluorescent labeling agent was designed by introducing an acrylamide group and a fluorescent dye to fusicoccin (FC). In vitro evaluation demonstrated that 12‐hydroxy <jats:bold>1</jats:bold> and <jats:bold>2</jats:bold> exhibit 14‐3‐3σ selective labeling activity over 14‐3‐3<jats:italic>ζ</jats:italic> in the presence of a mode‐3 phospholigand. Furthermore, <jats:bold>2</jats:bold> was shown to label 14‐3‐3σ in cell lysate in the presence of a C‐terminal mode‐3 phosphopeptide derived from ER<jats:italic>α</jats:italic>, with no apparent nonspecific labeling. These results indicate that <jats:bold>2</jats:bold> is capable of selective fluorescent detection of 14‐3‐3σ upon binding to mode‐3 phospholigand under biologically relevant conditions.</jats:p>

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詳細情報 詳細情報について

  • CRID
    1360017282231360512
  • DOI
    10.1002/chem.202301059
  • ISSN
    15213765
    09476539
  • データソース種別
    • Crossref
    • KAKEN

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