Mapping phosphorylation site of the regulatory light chain in smooth muscle myosin by immuno-electron microscopy.
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- WATANABE Michitoshi
- Division of Chemistry, Graduate School of Science, Hokkaido University
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- KATOH Tsuyoshi
- Division of Chemistry, Graduate School of Science, Hokkaido University
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- MORITA Fumi
- Division of Chemistry, Graduate School of Science, Hokkaido University
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- YAZAWA Michio
- Division of Chemistry, Graduate School of Science, Hokkaido University
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- Mapping phosphorylation site of the reg
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Phosphorylation site responsible for the regulation of smooth muscle myosin was mapped using a polyclonal antibody against a phosphorylated hendecapeptide corresponding to the amino acid sequence around Ser-19 in the regulatory light chain. Phosphorylated myosin mixed with the antibody was rotary-shadowed and was examined by electron microscopy. The antibody binding site was located in the head portion of myosin and the average distance from the head-rod junction was about 3nm toward the tip of myosin head. The results indicate that the phosphorylated Ser-19 in regulatory light chain is a little more extended toward the adjacent essential light chain in reference to the resolved N-terminal residues of the regulatory light chain in the three dimensional structure of myosin heads from other sources, in which the structure of the N-terminal portions homologous to the phosphorylated Ser-19 was not resolved (Rayment, I. et al. (1993) Science 261, 50-58; Xie, X. et al. (1994) Nature 368, 306-312). Intramolecular interaction through the introduced phosphoryl group may be the primary results in the regulatory light chain which releases the motor domain from its suppressed state.
収録刊行物
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- Proceedings of the Japan Academy. Ser. B: Physical and Biological Sciences
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Proceedings of the Japan Academy. Ser. B: Physical and Biological Sciences 74 (2), 31-34, 1998
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詳細情報 詳細情報について
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- CRID
- 1390282679124619904
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- NII論文ID
- 130000903048
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- NII書誌ID
- AA00785485
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- ISSN
- 13492896
- 03862208
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- NDL書誌ID
- 4498637
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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