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Vanadocytes, Cells hold the Key to Resolving the Highly Selective Accumulation and Reduction of Vanadium in Ascidians

https://hiroshima.repo.nii.ac.jp/records/2007710
https://hiroshima.repo.nii.ac.jp/records/2007710
cab44d41-c9da-4b88-9031-3bdf872b53b0
名前 / ファイル ライセンス アクション
MicroscopResTech_56_421-434_2002.pdf MicroscopResTech_56_421-434_2002.pdf (764.1 KB)
Item type デフォルトアイテムタイプ_(フル)(1)
公開日 2023-03-18
タイトル
タイトル Vanadocytes, Cells hold the Key to Resolving the Highly Selective Accumulation and Reduction of Vanadium in Ascidians
言語 en
作成者 Michibata, Hitoshi

× Michibata, Hitoshi

en Michibata, Hitoshi

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Uyama, Taro

× Uyama, Taro

en Uyama, Taro

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Ueki, Tatsuya

× Ueki, Tatsuya

en Ueki, Tatsuya

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Kanamori, Kan

× Kanamori, Kan

en Kanamori, Kan

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アクセス権
アクセス権 open access
アクセス権URI http://purl.org/coar/access_right/c_abf2
権利情報
権利情報 Copyright (c) 2002 Wiley-Liss, Inc.
主題
主題Scheme Other
主題 Ascidian
主題
主題Scheme Other
主題 Vanadium
主題
主題Scheme Other
主題 Accumulation
主題
主題Scheme Other
主題 Reduction
主題
主題Scheme Other
主題 pH
主題
主題Scheme Other
主題 Vacular H+-ATPase
主題
主題Scheme Other
主題 Monoclonal antibody
主題
主題Scheme NDC
主題 460
内容記述
内容記述 Since Henze discovered vanadium in the blood (or coelomic) cells of an ascidian in 1911, this unusual phenomenon has attracted the interest of many investigators. The highest concentration of vanadium (350 mM) in the blood cells of Ascidia gemmata, which belongs to the suborder Phlebobranchia, is 107 times higher than that in sea water. Of the approximately ten types of blood cells, a combination of cell fractionation and neutron-activation analysis revealed that the signet ring cells were the true vanadocytes. In the vanadocytes, 97.60f the vanadium is in the +3 oxidation state (III). The extremely low pH of 1.9 found in vanadocytes suggests that protons, concentrated by an H+-ATPase, might be linked to the accumulation of vanadium energetically. The antigen recognized by a monoclonal antibody, S4D5, prepared to identify vanadocytes, was determined to be 6-PGDH in the pentose phosphate pathway. NADPH produced in the pentose phosphate pathway in vanadocytes is thought to participate in the reduction of vanadium(V) to vanadium(IV). During embryogenesis, a vanadocyte-specific antigen first appears in the body wall at the same time as significant accumulations of vanadium become apparent. Three different vanadium-associated proteins (VAPs) were extracted from the blood cells of vanadium-rich ascidians. These are 12.5, 15, and 16 kDa in size and are associated with vanadium in an approximate ratio of 1:16. The cDNA encoding the 12.5 and 15 kDa VAPs was isolated and the proteins encoded were found to be novel. Further biochemical and biophysical characterization of the VAPs is in progress.
言語 en
出版者
出版者 Wiley-Liss, Inc.
言語
言語 eng
資源タイプ
資源タイプ識別子 http://purl.org/coar/resource_type/c_6501
資源タイプ journal article
出版タイプ
出版タイプ AO
出版タイプResource http://purl.org/coar/version/c_b1a7d7d4d402bcce
関連情報
識別子タイプ DOI
関連識別子 10.1002/jemt.10042
関連情報
識別子タイプ PMID
関連識別子 11921344
関連情報
関連タイプ isVersionOf
識別子タイプ DOI
関連識別子 http://dx.doi.org/10.1002/jemt.10042
収録物識別子
収録物識別子タイプ ISSN
収録物識別子 1059-910X
開始ページ
開始ページ 421
書誌情報 Microsopy research and technique
Microsopy research and technique

巻 56, p. 421-434, 発行日 2002
旧ID 22
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