가수분해 효소(혹은 아실전이효소)를 이용한 알콜과 아민의 아실반응은 에스터의 가수분해 반응(hydrolysis, deacylation)과 더불어 효소를 이용한 유기합성 반응에서 이미 잘 확립된 기술로서, 산업체에서 제약의 합성이나 고분자의 합성에서 널리 응용되고 있다. 이러한 효소를 이용한 아실화 반응은 주로 열역학적인 제한으로 인해 그동안 대부분이 주로 유기용매에서 이루어지고 있다. 최근 들어서, 수용액에서 아실화반응을 전이효소를 이용하여 효율적으로 할 수 있다는 보고와 함께 그 반응 기제에 대한 연구들이, X-ray 구조와 이러한 반응을 가능하게 하는 효소의 단백질 서열 비교 연구, 그리고 계산 화학에 의한 효소의 설계 연구등을 통해 새롭게 밝혀지고 있다. 본 총설에서는 효소를 이용한 아실화반응을 유기용매와 수용액에서의 수행함에 있어서 장단점을 비교해 보면서, 앞으로의 전망도 함께 제시하고자 한다. 특별히 다양한 천연물들의 구조 변화에 아실화 반응 생체촉매를 사용할 수 있는 가능성에 대해 살펴볼 것이다.

Enzymatic acylations catalyzed by hydrolytic enzymes, along with enzymatic hydrolysis, are established reactions in the synthesis of fine chemicals such as chiral intermediates and polymerizations in the industry. Those reactions have been carried out mostly in organic media due to the thermodynamic limitations. Recently, there have been reports on enzymatic acylations in aqueous media. They have dealt with the elucidation of reaction mechanisms of hydrolases_x000D_ and acyl transferases based on their X-ray structures, homology comparison of the two kinds of enzymes, substrate engineering of acyl donors and computational design of acyl transferases for enzymatic acylations in aqueous media. Enzymatic acylations play an important role in the combinatorial synthesis of natural products such as polyketides and nonribosomal peptides. In this review, the historic developments of enzymatic acylations and industrial examples are_x000D_ described briefly. In addition, recent developments of enzymatic acylations in the modification of natural products and their prospects will be discussed.

Enzymes Biocatalysis Acylations Regioselectivity Natural Products Combinatorial Biosynthesis

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