Piezo Electric Sensor for Endocrine-Disrupting Chemicals Using Receptor-co-factor Interaction

Masaharu Murata, Chifumi Gouda, Kentaro Yano, Shinichiro Kuroki, Tatsuo Suzutani, Yoshiki Katayama

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


In vitro screening assays are useful techniques for the determination of receptor-mediated activities in environmental samples. In order to define whether environmental chemicals act as an agonist or antagonist to the human estrogen receptor (hER), we have constructed a biosensor based on ligand-inducible interactions between hER and relative proteins on a quartz crystal microbalance (QCM). The his-tagged proteins, which were expressed in E. coli by recombinant DNA technology, were immobilized on an Au-electrode with Ni(II)-mediated chemisorption using the histidine tag and thiol-modified iminodiacetic acid. The resonance-frequency change of the protein-modified electrode was caused by association or dissociation with the hER relative proteins on the surface in the presence of estrogen. These results suggest that this sensor is applicable as a large-scale screening tool for estrogenic compounds.

Original languageEnglish
Pages (from-to)1355-1357
Number of pages3
Journalanalytical sciences
Issue number10
Publication statusPublished - Oct 2003

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry


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