Počet záznamů: 1
Precursors and formation of pyrithione and other pyridyl-containing sulfur compounds in drumstick onion, Allium stipitatum
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SYSNO ASEP 0359831 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Precursors and formation of pyrithione and other pyridyl-containing sulfur compounds in drumstick onion, Allium stipitatum Tvůrce(i) Kubec, R. (CZ)
Krejčová, P. (CZ)
Šimek, Petr (BC-A) RID, ORCID
Václavík, L. (CZ)
Hajšlová, J. (CZ)
Schraml, Jan (UCHP-M) RID, ORCID, SAICelkový počet autorů 6 Zdroj.dok. Journal of Agricultural and Food Chemistry. - : American Chemical Society - ISSN 0021-8561
Roč. 59, č. 10 (2011), s. 5763-5770Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Allium stipitatum ; S-(2-pyridyl)cysteine N-oxide ; marasmin Vědní obor RIV CE - Biochemie CEP IAA400720706 GA AV ČR - Akademie věd CEZ AV0Z50070508 - ENTU-I, BC-A (2005-2011) AV0Z40720504 - UCHP-M (2005-2011) UT WOS 000290691300076 DOI 10.1021/jf200704n Anotace Two novel, cysteine derivatives were isolated from the bulbs of Allium stipitatum (Allium sub) and shown to be S-(2-pyridyl)cysteine N-oxide and S-(2-pyridyl) glutathione N-oxide. The former compound is the first example of a naturally occurring alliinase substrate that contains an N-oxide functionality instead of the S-oxide group. In addition, S-methylcysteine S-oxide (methiin) and S-methyl thiomethyl)cysteine 4-oxide (marasmin) were found in the bulbs. The alliinase-mediated formation of pyridyl-containing compounds following disruption of A. stipitatum bulbs was studied by a combination of HPLC-MS, HPLC-PDA, DART-MS, and NMR techniques. No pyridyl-containing thiosulfinates are present in homogenized bulbs. Instead, various pyridine N-oxides such as N-hydroxypyridine-2(1H)-thione (pyrithione), 2-(methyldithio)pyridine N-oxide, 2-(methylthio) methyldithio]pyridine N-oxide, di(2-pyridyl) disulfide N-oxide, and di(2-pyridyl) disulfide N,N0-dioxide are reported. Pracoviště Biologické centrum (od r. 2006) Kontakt Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Rok sběru 2012
Počet záznamů: 1