翻訳と辞書 Words near each other ・ Oxyodes scrobiculata ・ Oxyodes tricolor ・ Oxyodontus ・ Oxyommata ・ Oxyopes ・ Oxyopes cornutus ・ Oxyopes kitabensis ・ Oxyopes lepidus ・ Oxyopes lineatus ・ Oxyopes macilentus ・ Oxyopes salticus ・ Oxyopes shweta ・ Oxyopes takobius ・ Oxyophthalmellus rehni ・ Oxyophthalmellus somalicus ・ Oxyopinin ・ Oxyopomyrmex ・ Oxyops vitiosa ・ Oxyopsis ・ Oxyopsis gracilis ・ Oxyosteus ・ Oxyothespis ・ Oxyothespis acuticeps ・ Oxyothespis alata ・ Oxyothespis apostata ・ Oxyothespis bifurcata ・ Oxyothespis brevicollis ・ Oxyothespis brevipennis ・ Oxyothespis dumonti ・ Oxyothespis flavipennis Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Oxyopinin ： ウィキペディア英語版 Oxyopinin Oxyopinins are a group of peptide toxins present in the venom of lynx spiders belonging to the genus ''Oxyopes'', hence the name ''oxyopinin''. They have antimicrobial, haemolytic, and insecticidal activities. They are the largest linear cationic amphipathic peptides detected in the venom of any spider. They are structurally α-helical peptides. The first five peptides, namely oxyopinins 1, 2a, 2b, 2c, and 2d, were described in 2002 from ''Oxyopes kitabensis''. Oxyopinin 1 is composed of 48 amino acid residues, with a molecular mass of 5221.2 Da. It has significant amino acid sequence similarity to other venoms of other animals. For example, it has 20% sequence similarity with the ant insecticidal peptide ponericinL2. It is also 29% identical to the amino acid residues of the frog antimicrobial peptide dermaseptin. Oxyopinins 2a, 2b, 2c, and 2d (originally designated oxyopinins 2, 3, 4, and 5 respectively) are very similar in their sequences. At least 27 out of 37 their amino acid residues are conserved, that is, identical. Their molecular sizes are 4127.1, 4146.9, 4064.7, and 4156.8 Da respectively. All the oxyopinins indicate their secondary structure essentially as alpha-helical. They cause disruption of both biological membranes and artificial vesicles, particularly to those rich in phosphatidylcholine. They act together with neurotoxins called oxytoxins from the same venom for increased effectiveness as insecticide. The sixth peptide oxyopinin 4a (Oxt-4a) was reported in 2011 from ''Oxyopes takobius''. It is composed of 77 amino acid residues, and has molecular mass of 9,205 Da. It contains a single disulfide bond, Cys4-Cys10, at the N-terminal, which is different from any other spider toxin known so far. Further, unlike other arachnid toxins, Oxt-4a is very similar to defense peptides from the skin of frogs that contain the so-called Rana-box motif (a C-terminal disulfide-enclosed loop). ==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「Oxyopinin」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.