A high-performance affinity purification technique has been developed for cisplatin (CDDP)-damaged DNA binding proteins directly from crude nuclear extracts of HeLaS3 cell using novel submicron beads synthesized by copolymerization of styrene and glycidyl methacrylate (GMA). The beads dramatically decreased both nonspecific protein adsorption on solid surfaces and elution volume and simplified the handling procedure. Preparation of the beads for purification was carried out by immobilization of telomeric repeats, (TTAGGG)(n), on the surface after the reaction with CDDP. At least nine proteins clearly showed higher affinity to CDDP-DNA and were identified by amino acid sequence analysis including HMGB (high mobility group), hUBF (human upstream binding factor), and Ku autoantigen, which were previously reported to be components of CDDP-damaged DNA binding proteins.

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submicron beads solid nonspecific protein adsorption ku autoantigen acid sequence nuclear extracts of helas3 cell elution cddpdna cddpdamaged dna binding proteins telomeric repeats ttagggn hmgb high mobility group hubf human upstream binding factor affinity purification technique

Takenori, Tomohiro Jun-ichi, Sawada Ji Chika, Sawa Hironori, Nakura Shuhei, Yoshida Masato, Kodaka Mamoru, Hatakeyama Haruma, Kawaguchi Hiroshi, Handa Hiroaki, Okuno,.Total analysis and purification of cellular proteins binding to cisplatin-damaged DNA using submicron beads.. 13 (2),163-6.

Takenori, Tomohiro Jun-ichi, Sawada Ji Chika, Sawa Hironori, Nakura Shuhei, Yoshida Masato, Kodaka Mamoru, Hatakeyama Haruma, Kawaguchi Hiroshi, Handa Hiroaki, Okuno,"Total analysis and purification of cellular proteins binding to cisplatin-damaged DNA using submicron beads." 13

Takenori, Tomohiro Jun-ichi, Sawada Ji Chika, Sawa Hironori, Nakura Shuhei, Yoshida Masato, Kodaka Mamoru, Hatakeyama Haruma, Kawaguchi Hiroshi, Handa Hiroaki, Okuno,"Total analysis and purification of cellular proteins binding to cisplatin-damaged DNA using submicron beads."