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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Proton-gated urea channel ： ウィキペディア英語版 Proton-gated urea channel The proton-gated urea channel is an inner-membrane protein essential for the survival to ''Helicobacter pylori''. It enables the rapid influx of urea into the bacterium. It is closed at pH 7.0 and fully open at pH 5.0. Urease activity buffers the periplasm to pH 6.1. Using multiwavelength anomalous dispersion (MAD), its structure, a compact hexameric ring about 95 Å in diameter and 45 A ̊ in height, was determined. The centre is filled with a lipid plug that forms an asymmetric bilayer. Amino residues that can be protonated in the periplasmic domain are important for proton sensing or gating.〔D. Strugatsky, R. McNulty, K. Munson, C.-K. Chen, S. M. Soltis, G. Sachs & H. Luecke (2012) Structure of the proton-gated urea channel from the gastric pathogen Helicobacter pylori, ''Nature'' 493, 255–258.〕 ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Proton-gated urea channel」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.