Structure of a novel flavin chromophore from Avena coleoptiles, the possible 'blue light' photoreceptor.
Structure of a novel flavin chromophore from Avena coleoptiles, the possible 'blue light' photoreceptor.
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来自燕麦胚芽鞘的新型黄素发色团的结构，可能是“蓝光”感光体。
DOI：
10.1111/j.1432-1033.1984.tb07920.x
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发表时间：
1984
期刊：
影响因子：
--
通讯作者：
T. Kuster
中科院分区：
文献类型：
--
作者：
S. Ghisla;R. Mack;G. Blankenhorn;P. Hemmerich;E. Krienitz;T. Kuster
从暗培养的燕麦胚芽鞘中分离到一种黄色发色团。以前曾由Zenk [Zenk，M. H.（1967）Z. Pflanzenphysiol. 56，122 - 140]是一种结构尚未确定的黄素，并被认为是这种生物体中的“蓝光”感光器。这种黄素（F1-X）的结构已被鉴定为5 ′-丙二酰核黄素，通过结合物理化学技术，并通过其与合成获得的样品的同一性。5 '-丙二酸酯键对水解和光解相对不稳定，它异构化成可能含有4'异构体的平衡混合物。5 '-丙二酰核黄素的电子光谱（吸收和荧光）实际上与正常核黄素（维生素B2）的电子光谱相同。
A yellow chromophore has been isolated from Avena coleoptiles grown in the dark. It had previously been shown by Zenk [Zenk, M. H. (1967) Z. Pflanzenphysiol. 56, 122 - 140] to be a flavin of still unidentified structure, and had been suggested to be the 'blue light' photoreceptor in this organism. The structure of this flavin (F1-X) has been identified as 5'-malonylriboflavin by a combination of physicochemical techniques, and by its identity with a sample obtained synthetically. The 5'-malonylester linkage is relatively labile towards hydrolysis and photolysis, it isomerizes to an equilibrium mixture containing probably the 4' isomer. The electronic spectra of 5'-malonylriboflavin (absorption and fluorescence) are practically identical to those of normal riboflavin (vitamin B2).