首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Sulfite formation by wine yeasts
Authors:Wolfgang Dott  Hans G Trüper
Institution:(1) Institut für Mikrobiologie der Universität, Meckenheimer Allee 168, D-5300 Bonn, Germany;(2) Present address: Hygiene-Institut, Sigmund-Freud-Straße, D-5300 Bonn, Germany
Abstract:Four strains of wine yeasts of two different species (Saccharomyces cerevisiae var. ellipsoideus and Saccharomyces bayanus) were investigated with respect to the influence of various sulfur compounds on the formation of O-acetylserine sulfhydrylase, O-acetylhomoserine sulfhydrylase and serine sulfhydrase. The specific enzyme activities were followed over a growth period of 96 h.In the presence of sulfate, sulfite and djencolic acid during exponential growth, a moderate increase of O-acetylserine sulfhydrylase and O-acetylhomoserine sulfhydrylase activities was recognized. In three strains cysteine and methionine prevented this derepression. At the end of the exponential growth phase, biosynthesis of these two enzymes was suppressed again. Serine sulfhydrase showed a modified regulation which indicates that its synthesis and the synthesis of O-acetylserine and O-acetylhomoserine sulfhydrylases are not coordinated.Abbreviations OAS O-acetylserine - OAHS O-acetylhomoserine
Keywords:Wine yeasts  Sulfite formation  Sulfur metabolism  OAS/OAHS-sulfhydrylase regulation  Serine sulfhydrase regulation
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号