Homology Modeling of an Algal Membrane Protein, Heterosigma Akashiwo Na+–ATPase
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- Jo Taeho
- Biochemistry and Biophysics, Graduate School of Healthcare Sciences Tokyo Medical and Dental University
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- Shono Mariko
- Tropical Agriculture Research Front, Japan International Research Center for Agricultural Sciences
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- Wada Masato
- Apple Research Station, National Institute of Fruit Tree Science, National Agriculture and Food Research Organization
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- Ito Sayaka
- Biochemistry and Biophysics, Graduate School of Healthcare Sciences Tokyo Medical and Dental University
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- Nomoto Junko
- Biochemistry and Biophysics, Graduate School of Healthcare Sciences Tokyo Medical and Dental University
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- Hara Yukichi
- Biochemistry and Biophysics, Graduate School of Healthcare Sciences Tokyo Medical and Dental University
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The three–dimensional structure of Heterosigma akashiwo Na+–ATPase (HANA) was predicted by means of homology modeling based on the crystal structure of the K+–bound form of shark Na+/K+–ATPase (PDB ID: 2ZXE). The overall structure of HANA appears to be similar to that of shark Na+/K+–ATPase. Both contain three characteristic cytoplasmic domains, A, N and P, which are unique to P–type ATPases. HANA has a long TM7–8 junction as a large extracellular domain, in place of the β–subunit of shark Na+/K+–ATPase. Two putative K+–binding sites in the transmembrane domain of HANA were identified by means of valence mapping based on the constructed structure. The presence of K+–binding sites and the reported ion requirements for ATPase activity and EP formation indicate that HANA may transport K+ ions in the same manner as animal Na+/K+–ATPases.
収録刊行物
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- 膜
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膜 35 (2), 80-85, 2010
日本膜学会
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詳細情報 詳細情報について
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- CRID
- 1390001206421588480
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- NII論文ID
- 130005075551
- 10026877117
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- NII書誌ID
- AN0023215X
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- ISSN
- 18846440
- 03851036
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- NDL書誌ID
- 10635083
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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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- 使用不可