天然产物系统的生物合成创新是由将新基因和酶招募到这些复杂途径中驱动的。在这里,描述了 curacin A 的聚酮合酶的前所未有的脱羧链终止机制,curacin A 是一种从海洋蓝细菌 Lyngbya majuscula 中分离出来的抗癌先导化合物。对嵌入 CurM 中的包含相邻磺基转移酶 (ST) 和硫酯酶 (TE) 催化结构域的不寻常链终止模块进行了生化表征。TE被证明可以催化聚酮化合物链延长中间体的水解链释放。此外,还发现 (R)-β-羟基的选择性 ST 介导的磺化发生在 TE 介导的水解之前,引发连续的脱羧消除并导致最终代谢物中稀有末端烯烃的形成。
METHOD FOR ENZYMATIC PRODUCTION OF DECARBOXYLATED POLYKETIDES AND FATTY ACIDS
申请人:Sherman David H.
公开号:US20110091952A1
公开(公告)日:2011-04-21
Disclosed herein are methods of preparing alkenes from beta-hydroxy or beta-sulfate carboxylic acid or carboxylic acid derivatives using thioesterase and optionally a sulfotransferase.
本文披露了一种利用硫酯酶和可选的磺酸转移酶从β-羟基或β-磺酸酯羧酸或羧酸衍生物制备烯烃的方法。
Method for enzymatic production of decarboxylated polyketides and fatty acids
申请人:Sherman David H.
公开号:US08765431B2
公开(公告)日:2014-07-01
Disclosed herein are methods of preparing alkenes from beta-hydroxy or beta-sulfate carboxylic acid or carboxylic acid derivatives using thioesterase and optionally a sulfotransferase.
本文公开了一种利用硫酯酶和可选的硫酸转移酶,从β-羟基或β-硫酸酯羧酸或羧酸衍生物制备烯烃的方法。
COOLING SENSATION AGENT COMPOSITION AND SENSORY STIMULATION AGENT COMPOSITION
申请人:Ishida Kenya
公开号:US20110117147A1
公开(公告)日:2011-05-19
The invention relates to a cooling sensation agent composition with a prolonged cool sensation effect comprising at least one compound selected from Formula (1) wherein each of A and B is a hydrogen atom or a hydrocarbon group which may have one or more substituents, in which A and B are not hydrogen atoms simultaneously, and the total number of carbon atoms in A and B is in the range of 6 to 18; and Formulae (2) to (4) wherein R1, R2, and R3 each represent a residue of an alcohol selected from 1-menthol, 1-isopulegol, 3-(1-menthoxy)propan-1,2-diol, 2-(1-menthoxy)ethan-1-ol, 3-(1-menthoxy)propan-1-ol, 2-methyl-3-(1-menthoxy)propan-1,2-diol and para-menthan-3,8-diol), and R4 represents a residue of a branched or straight-chain, cyclic or linear, or saturated or unsaturated alcohol having 6 to 18 carbon atoms that may have one or more aromatic rings that may have a condensed ring and substituent groups such as hydroxyl and ether groups; and R6 represents a hydrocarbon group having 11 to 19 carbon atoms that may be branched and contain one or more unsaturated bonds. The invention also relates to a sensory stimulation agent composition comprising the cooling sensation agent composition; a flavor or fragrance composition, a beverage or food product, a perfume or cosmetic product, a toiletry product, a daily utensil product or grocery, a fiber, a fiber product, a cloth or a medicine comprising the cooling sensation agent composition or the sensory stimulation agent composition; a production method thereof; a cooling processing method of a fiber, fiber product or a cloth, comprising compounding the cooling sensation agent composition or the sensory stimulation agent composition; and new compounds.