書誌事項
- タイトル別名
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- Production of 25-hydroxyvitamin D_2 in the recombinant yeast cells expressing human CYP2R1
- ヒト ユライ CYP2R1 ハツゲン コウボ オ モチイタ 25-ヒドロキシビタミン D ₂ ノ セイサン
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抄録
It is commonly known that vitamin D is initially metabolized to 25-hydroxyvitamin D (25(OH)D) in the liver, and then 25(OH)D is metabolized to a functionally active form, 1α,25-dihydroxyvitamin D (1α,25(OH)_2D), in the kidney. CYP2R1 is known to be a physiologically important vitamin D 25-hydroxylase in humans. In this study, we examined production of 25-hydroxyvitamin D_2 (25(OH)D_2) using recombinant yeast cells expressing human CYP2R1. When either vitamin D_3 (VD_3) or vitamin D_2 (VD_2) was added to the cell suspension of the CYP2R1-expressing yeast cells in a buffer containing glucose and 3-hydroxyrpropyl-β-cyclodextrin, the corresponding 25-hydroxylated product was detected. However, the conversion ratio was insufficient, which was probably due to a low efficiency of uptake of the substrate by yeast cells. To overcome this problem, we tried to examine the production of 25(OH)D_2 by a novel method using UV irradiation. When the suspension of the CYP2R1-expressing yeast cells in a buffer containing glucose was irradiated with UVB and then incubated at 37℃, 25(OH)D_2 was produced without VD_2 addition. This 25(OH)D_2 production could be due to the conversion of endogenous ergosterol to VD_2 by UV irradiation and thermal isomerization with the consequent conversion of the resulting VD_2 to 25(OH)D_2 by CYP2R1. Expectedly, the productivity of 25(OH)D_2 with this novel method was higher than that with the method to add VD_2 to the cell suspension.
収録刊行物
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- ビタミン
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ビタミン 88 (9), 451-457, 2014
公益社団法人 日本ビタミン学会
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詳細情報 詳細情報について
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- CRID
- 1390282680677872000
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- NII論文ID
- 110009844817
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- NII書誌ID
- AN00207833
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- ISSN
- 2424080X
- 0006386X
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- NDL書誌ID
- 025825315
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可