{"title":"Peptide-lanthanide交互。铕(III)-甘油三酯配合物的晶体结构。","authors":"K Aparna, P Balaram, S S Krishnamurthy, M Nethaji","doi":"","DOIUrl":null,"url":null,"abstract":"<p><p>Crystals of Eu-(Gly-Gly-Gly).(H2O)5.(ClO4)3 are triclinic, spacegroup P1 with a = 9.123 (2), b = 11.185 (5), c = 11.426 (2) A; alpha = 90.79 (2), beta = 98.08 (1), gamma = 98.57 (2) degrees; Z = 2. The europium cation is surrounded by four oxygens from three different peptide units and four oxygens from water molecules. The geometry around the metal is a distorted bi-capped trigonal prism. The peptide backbone conformation in this complex is compared with those in the free peptide and in various metal complexes. Considerable differences are observed between Eu(III) and Ca(II) complexes of triglycine.</p>","PeriodicalId":14204,"journal":{"name":"International journal of peptide and protein research","volume":"43 1","pages":"19-22"},"PeriodicalIF":0.0000,"publicationDate":"1994-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Peptide-lanthanide interactions. Crystal structure of a europium(III)-triglycine complex.\",\"authors\":\"K Aparna, P Balaram, S S Krishnamurthy, M Nethaji\",\"doi\":\"\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Crystals of Eu-(Gly-Gly-Gly).(H2O)5.(ClO4)3 are triclinic, spacegroup P1 with a = 9.123 (2), b = 11.185 (5), c = 11.426 (2) A; alpha = 90.79 (2), beta = 98.08 (1), gamma = 98.57 (2) degrees; Z = 2. The europium cation is surrounded by four oxygens from three different peptide units and four oxygens from water molecules. The geometry around the metal is a distorted bi-capped trigonal prism. The peptide backbone conformation in this complex is compared with those in the free peptide and in various metal complexes. Considerable differences are observed between Eu(III) and Ca(II) complexes of triglycine.</p>\",\"PeriodicalId\":14204,\"journal\":{\"name\":\"International journal of peptide and protein research\",\"volume\":\"43 1\",\"pages\":\"19-22\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1994-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International journal of peptide and protein research\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International journal of peptide and protein research","FirstCategoryId":"1085","ListUrlMain":"","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
Eu-(Gly-Gly-Gly).(H2O)5.(ClO4)3为三斜晶体，空间群P1, a = 9.123 (2)， b = 11.185 (5)， c = 11.426 (2) a;Alpha = 90.79 (2)， beta = 98.08 (1)， gamma = 98.57(2)度;Z = 2。铕阳离子被来自三个不同肽单元的四个氧原子和来自水分子的四个氧原子所包围。金属周围的几何形状是一个扭曲的双头三角棱镜。将该配合物中的肽主链构象与游离肽和各种金属配合物中的肽主链构象进行了比较。在甘油三氨酸的Eu(III)和Ca(II)配合物之间观察到相当大的差异。
Peptide-lanthanide interactions. Crystal structure of a europium(III)-triglycine complex.
Crystals of Eu-(Gly-Gly-Gly).(H2O)5.(ClO4)3 are triclinic, spacegroup P1 with a = 9.123 (2), b = 11.185 (5), c = 11.426 (2) A; alpha = 90.79 (2), beta = 98.08 (1), gamma = 98.57 (2) degrees; Z = 2. The europium cation is surrounded by four oxygens from three different peptide units and four oxygens from water molecules. The geometry around the metal is a distorted bi-capped trigonal prism. The peptide backbone conformation in this complex is compared with those in the free peptide and in various metal complexes. Considerable differences are observed between Eu(III) and Ca(II) complexes of triglycine.
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