نتایج جستجو برای: hyoscyamus muticus

تعداد نتایج: 364  

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1996
K Back J Chappell

Cyclic terpenes and terpenoids are found throughout nature. They comprise an especially important class of compounds from plants that mediate plant- environment interactions, and they serve as pharmaceutical agents with antimicrobial and anti-tumor activities. Molecular comparisons of several terpene cyclases, the key enzymes responsible for the multistep cyclization of C10, C15, and C20 allyli...

Journal: :Plant physiology 1995
J Bilang A Sturm

Previously, we identified a soluble protein from Hyoscyamus muticus that was photolabeled by 5-azido-indole-3-acetic acid. This protein was determined to be a glutathione S-transferase (GST; J. Bilang, H. Macdonald, P.J. King, and A. Sturm [1993] Plant Physiol 102: 29-34). We have examined the effect of auxin on the activity of this H. muticus GST. Auxins reduced enzyme activity only at high co...

2008
P.E. O’Maille A. Malone N Dellas B. A. Hess L. Smentek I. Sheehan B.T. Greenhagen J. Chappell G. Manning J.P. Noel

Throughout molecular evolution, organisms create assorted chemicals in response to varying ecological niches. Catalytic landscapes underlie metabolic evolution, wherein mutational steps alter the biosynthetic properties of enzymes. Here we report the first systematic quantitative characterization of the catalytic landscape underlying the evolution of sesquiterpene chemical diversity. On the bas...

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