The present invention provides an isolated protein obtainable from a plant source which has antifungal activity, specifically anti-Phytophthora activity and/or anti-Pythium activity and a molecular weight of about 55-65 kDa as judged by SDS PAGE-electrophoresis, an isolated DNA sequence comprising an open reading frame capable of encoding a protein according to the invention, preferably characterized in that it comprises an open reading frame which is capable of encoding a protein depicted in SEQ ID NO. 16, SEQ ID NO. 57, SEQ ID NO. 70, SEQ ID NO. 72 or SEQ ID NO. 74 or muteins thereof, and DNA capable of hybridizing therewith under stringent conditions The invention further comprises plants incorporating chimeric DNA capable of encoding a protein according to the invention and wherein the protein is expressed. Also shown is the carbohydrate and preferably hexose oxidating activity of said protein. Also methods are provided for combating fungi, especially Phytophthora and Pythium species, using a protein or a host cell capable of producing the protein.
本发明提供了一种可从植物来源中获得的孤立蛋白,该蛋白具有抗真菌活性,特别是抗疫霉活性和/或抗
金线虫活性,并且根据
SDS PAGE电泳的判断,其分子量约为55-65 kDa。本发明还提供了一种孤立的DNA序列,包括一个开放阅读框架,能够编码本发明中的蛋白质,最好具有能够编码
SEQ ID NO. 16、
SEQ ID NO. 57、
SEQ ID NO. 70、
SEQ ID NO. 72或
SEQ ID NO. 74或其突变体的开放阅读框架,并且具有在严格条件下与之杂交的DNA。本发明还包括植物,其中包含嵌合DNA,能够编码本发明中的蛋白质,并且该蛋白质被表达。同时,还展示了该蛋白质的
碳水化合物和最好的己糖氧化活性。本发明还提供了使用蛋白质或能够产生蛋白质的宿主细胞来对抗真菌,特别是疫霉和
金线虫物种的方法。