{"title":"Stacking interactions between aromatic amino acids and adenine ring of ATP in zinc mediated ternary complexes","authors":"Jean-Jacques Toulme","doi":"10.1016/S0006-3061(00)80165-9","DOIUrl":null,"url":null,"abstract":"<div><p>Spectrophotometric studies have provided evidence for zinc-mediated ternary complexes between ATP and aromatic amino acids. The hypochromicity observed in the 260 nm band of ATP increased in the order phenylanine <tyrosine<tryptophan. Adding alanine did not produce any change of the ATP spectrum. The association constant was four fold higher for the ATP-Zinc-Tryptophan complex than for that of the ATP-Zinc-Alanine. The increased stability of the former complex was ascribed to the stacking interaction between indole and adenine rings. The maximum concentrations of the ATP-Zinc-Tryptophan complex occurred at about pH 8.0. For these ternary complexes several possible stacked structures involving or not involving N(7) of adenine are discussed.</p></div>","PeriodicalId":9177,"journal":{"name":"Bioinorganic chemistry","volume":"8 4","pages":"Pages 319-329"},"PeriodicalIF":0.0000,"publicationDate":"1978-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0006-3061(00)80165-9","citationCount":"17","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bioinorganic chemistry","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0006306100801659","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 17
Abstract
Spectrophotometric studies have provided evidence for zinc-mediated ternary complexes between ATP and aromatic amino acids. The hypochromicity observed in the 260 nm band of ATP increased in the order phenylanine <tyrosine<tryptophan. Adding alanine did not produce any change of the ATP spectrum. The association constant was four fold higher for the ATP-Zinc-Tryptophan complex than for that of the ATP-Zinc-Alanine. The increased stability of the former complex was ascribed to the stacking interaction between indole and adenine rings. The maximum concentrations of the ATP-Zinc-Tryptophan complex occurred at about pH 8.0. For these ternary complexes several possible stacked structures involving or not involving N(7) of adenine are discussed.