NDLI: The role of tropomyosin in the interactions of F-actin with caldesmon and actin-binding protein (or filamin)

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The role of tropomyosin in the interactions of F-actin with caldesmon and actin-binding protein (or filamin)

Content Provider	Scilit
Author	Nomura, Masao Yoshikawa, Kunihiko Tanaka, Toshihiko Sobue, Kenji Maruyama, Koscak
Copyright Year	1987
Description	Journal: Journal of Biological Inorganic Chemistry The interactions of actin filaments with actin-binding protein (filamin) and caldesmon under the influence of tropomyosin were studied in detail using falling-ball viscometry, binding assay and electron microscopy. Caldesmon decreased the binding constant of filamin with F-actin. In contrast, the maximum binding ability of filamin to F-actin was decreased by tropomyosin. The filamin-induced gelation of actin filaments was inhibited by caldesmon. Tropomyosin also inhibited this gelation. The effect of caldesmon became stronger under the influence of tropomyosin. Furthermore, both caldesmon and tropomyosin additionally decreased the filamin binding to F-actin. From these results, caldesmon and tropomyosin appeared to influence filamin binding to F-actin with different modes of actin. In addition, there was no sign of direct interactions between filamin, caldesmon and tropomyosin as judged from gel filtration. Under the influence of caldesmon and tropomyosin, calmodulin conferred Ca2+ sensitivity on the filamin-induced gelation of actin filaments.
Related Links	http://onlinelibrary.wiley.com/doi/10.1111/j.1432-1033.1987.tb10892.x/pdf
Ending Page	471
Page Count	5
Starting Page	467
ISSN	09498257
e-ISSN	14321327
DOI	10.1111/j.1432-1033.1987.tb10892.x
Journal	Journal of Biological Inorganic Chemistry
Issue Number	3
Volume Number	163
Language	English
Publisher	Wiley-Blackwell
Publisher Date	1987-03-01
Access Restriction	Open
Subject Keyword	Journal: Journal of Biological Inorganic Chemistry Caldesmon Under the Influence Binding To F Actin Actin Filaments
Content Type	Text
Resource Type	Article
Subject	Biochemistry Inorganic Chemistry

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