Engineered<scp>L</scp>-Serine Hydroxymethyltransferase from<i>Streptococcus thermophilus</i>for the Synthesis of α,α-Dialkyl-α-Amino Acids
作者:Karel Hernandez、Igor Zelen、Giovanna Petrillo、Isabel Usón、Claudia M. Wandtke、Jordi Bujons、Jesús Joglar、Teodor Parella、Pere Clapés
DOI:10.1002/anie.201411484
日期:2015.3.2
are central to biotechnological and biomedical chemical processes for their own sake and as substructures of biologically active molecules for diverse biomedical applications. Structurally, these compounds contain a quaternary stereocenter, which is particularly challenging for stereoselective synthesis. The pyridoxal‐5′‐phosphate (PLP)‐dependent L‐serine hydroxymethyltransferase from Streptococcus thermophilus
就其本身而言,α,α-二取代的α-氨基酸是生物技术和生物医学化学过程的核心,并且是生物活性分子在各种生物医学应用中的亚结构。在结构上,这些化合物包含一个四级立体中心,这对于立体选择性合成特别具有挑战性。嗜热链球菌的依赖吡ido醛5'-磷酸(PLP)的L-丝氨酸羟甲基转移酶(SHMT Sth ; EC 2.1.2.1)经过工程设计,可以实现多种结构的α,α-二烷基-α-氨基的立体选择性合成酸。这是通过醛糖添加氨基酸D‐ Ala和D形成四级立体中心来实现的-克服了Gly天然酶的局限性,由简约的SHMT Sth Y55T变体催化,可将其带入一个广泛的受体范围。SHMT Sth Y55T变体可耐受芳族和脂肪族醛以及含羟基和氮的醛作为受体。