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Reannealing of phalloidin‐treated actin filaments during recovery after sonication and its inhibition by β‐actinin
Author(s) -
Oosawa Masatake,
Maruyama Koscak
Publication year - 1987
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(87)81537-5
Subject(s) - sonication , phalloidin , protein filament , actin , chemistry , tris , biophysics , chromatography , biochemistry , cytoskeleton , biology , cell
Phalloidin (2 mol per mol actin)‐treated pyrenyl F‐actin showed a critical concentration of 1.8 μM in the presence of 10 mM KCl, 0.2 mM ADP, and 5 mM Tris‐HCl buffer, pH 8.0 at 25°C. The filament weight concentration did not change at all during and after sonication, yet degrees of flow birefringence increased and the filament number concentration decreased after the termination of sonication. The latter changes were not affected by EDTA, but inhibited by β‐actinin. These observations suggest that reannealing of short pieces of phalloidin‐treated actin filaments fragmented during sonication takes place during recovery after sonication.