Biosynthetic Production of 4-Amino 4-Deoxychorismate (Adc) and [3R,4R]-4-Amino-3-Hydroxycyclohexa-1,5-Diene-1-Carboxylic Acid (3,4-Cha)
申请人:Wubbolts Marcel Gerhardus
公开号:US20080311631A1
公开(公告)日:2008-12-18
The invention relates to a process for the biosynthetic production of 4-amino-4-deoxychorismate (ADC) performed fermentatively in vivo with a 4-amino-4-deoxychorismate synthase, preferably a PabAB bipartite protein (which may be a fusion protein), at an increased level of activity, thereby obtaining a broth comprising ADC and 4-amino-4-deoxyprephenate (ADP), that are recovered. The invention also relates to a further process of converting the ADP into p-aminophenylalanine. The invention, moreover relates to biosynthetic production of [3R,4R]-4-amino-3-hydroxycyclohexa-1,5-diene-1-carboxylic acid (3,4-CHA), by concerted action of such 4-amino-4-deoxychorismate synthase and of an enzyme capable of converting isochorismate into [5S,6S]-5,6 dihydroxycyclohexa-1,3-diene-1-carboxylic acid (2,3-CHD), preferably a phenazine biosynthesis protein PhzD, including recovery of 3,4-CHA. The invention also relates to expression vectors and host cells for use in any of such processes. The invention further relates to the use of 3,4-CHA as a catalytically active product, in particular as a chiral catalyst. And the invention finally relates to synthesis of oseltamivir phosphate from 3,4-CHA.
该发明涉及一种生物合成4-氨基-4-脱氧黄嘌呤酸(ADC)的过程,通过在体内发酵使用4-氨基-4-脱氧黄嘌呤酸合成酶,优选为PabAB二分体蛋白(可为融合蛋白)在增加的活性水平下进行,从而获得包含ADC和4-氨基-4-脱氧前苯酸(ADP)的菌液,然后进行回收。该发明还涉及将ADP转化为对氨基苯丙氨酸的进一步过程。此外,该发明还涉及通过这种4-氨基-4-脱氧黄嘌呤酸合成酶和能够将异黄嘌呤酸转化为[5S,6S]-5,6-二羟基环己基-1,3-二烯-1-羧酸(2,3-CHD)的酶的协同作用,优选为苯肼生物合成蛋白PhzD,生物合成[3R,4R]-4-氨基-3-羟基环己-1,5-二烯-1-羧酸(3,4-CHA),并回收3,4-CHA。该发明还涉及用于任何这种过程的表达载体和宿主细胞。此外,该发明还涉及将3,4-CHA用作具有催化活性的产品,特别是作为手性催化剂。最后,该发明还涉及从3,4-CHA合成奥司他韦磷酸盐的方法。