The sulfur chemistry of shiitake mushroom.

The sulfur chemistry of shiitake mushroom. Research Abstract Details 

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The sulfur chemistry of shiitake mushroom. Abstract Text:

Eileen Yu Sneeden,Hugh H Harris,Ingrid J Pickering,Roger C Prince,Sherida Johnson,Xiaojie Li,Eric Block,Graham N George,

Allium herbs, such as Chinese chive, garlic, and onion, share a common sulfur biochemistry that occurs on cell breakage. Sulfoxide precursors are converted enzymatically to sulfenic acid intermediates and thence to a variety of pungent and in some cases noxious sulfur species that probably act to deter herbivores. Very similar biochemistry has been proposed to occur in shiitake mushrooms. Prior to the present work, our understanding of the sulfur biochemistry of these plants and fungi has been derived largely from conventional analysis procedures. We have used in situ sulfur K-edge X-ray absorption spectroscopy in intact and disrupted allium plants and shiitake mushroom. The expected changes in sulfur forms following cell breakage are indeed observed for the alliums, but no significant changes occur for the fungus. Thus, any changes involving the sulfur-containing compounds of shiitake mushroom following cell breakage occur to a far smaller extent than those involving allium plants, presumably reflecting the need in shiitake for action by multiple enzymes, namely a gamma-glutamyl transpeptidase and a C-S lyase. The shiitake C-S lyase occurs in far lower concentrations than the corresponding enzyme in garlic. Furthermore, cleavage of the flavorant precursor by the shiitake C-S lyase is reported to cease before cleavage of the precursor has been completed, presumably due to a product or suicide inhibition mechanism.

The sulfur chemistry of shiitake mushroom. Publishing Authors By Initials

EY Sneeden,HH Harris,IJ Pickering,RC Prince,S Johnson,X Li,E Block,GN George,

For similar inorganic chemicals: sulfur compounds research abstracts see: inorganic chemicals: sulfur compounds research

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The sulfur chemistry of shiitake mushroom. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Journal of the American Chemical Society

VOLUME: 126

Page Numbers: 458-9

Journal Abbreviation: J. Am. Chem. Soc.

ISSN: 0002-7863

DAY: 21

MONTH: Jan

YEAR: 2004

The sulfur chemistry of shiitake mushroom. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 7503056

The sulfur chemistry of shiitake mushroom. Keywords Mesh Terms:

KEYWORDS: Sulfur Compounds

MESH TERMS: analysis

Chemical & Substance for Abstract: The sulfur chemistry of shiitake mushroom. Information

Substance Name: Sulfur Compounds

Registry Number: 0

Grant and Affiliation Information for The sulfur chemistry of shiitake mushroom.

AFFILIATION: Stanford Synchrotron Radiation Laboratory, Stanford Linear Accelerator Center, 2575 Sand Hill Road, MS 69, Menlo Park, California 94025Gómez.

Country: United States

AGENCY: United States NIGMS

GRANT: GM57375

ACRONYM: GM

MEDLINETA: J Am Chem Soc

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