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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 WALP peptide ： ウィキペディア英語版 WALP peptide WALP peptides are a class of synthesized, membrane-spanning α-helices composed of tryptophan (W), alanine (A), and leucine (L) amino acids. They are designed to study properties of proteins in lipid membranes such as orientation, extent of insertion, and hydrophobic mismatch. ==Significance== The transmembrane region of many integral membrane proteins consists of one or more alpha helices. The orientations and interactions of these helices directly affect cell signaling and molecular transport across the bilayer. The hydrophobic environment of the phospholipid tails in turn modulates the position and structure of such domains and thus may influence protein function. Conversely, the bilayer itself can (locally) change the thickness of its hydrocarbon region to interact optimally with hydrophobic regions of a transmembrane protein (a.k.a. hydrophobic matching). WALPs provide an effective model for studying such interactions because of their systematic design of a core of hydrophobic, alternating alanine and leucine regions. This core is readily manipulated by extending or decreasing the number of amino acids. Another key feature is the presence of "anchoring" residues at the ends of the helix, which are tryptophan residues in the WALP versions. Substituting the anchoring tryptophan residues for charged residues, such as lysine, yields "KALP" peptides. This class of model peptides has proved useful for studying the impact of changes in lipid composition on peptide insertion. Following detailed experimental studies by various techniques, the WALP and related peptides have become commonly used model systems in computational biology. 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「WALP peptide」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.