Activation of β- and γ-carbonic anhydrases from pathogenic bacteria with tripeptides
作者:Azzurra Stefanucci、Andrea Angeli、Marilisa Pia Dimmito、Grazia Luisi、Sonia Del Prete、Clemente Capasso、William A. Donald、Adriano Mollica、Claudiu T. Supuran
DOI:10.1080/14756366.2018.1468530
日期:2018.1.1
incorporating acidic amino acid residues were prepared for investigation as activators of β- and γ-carbonic anhydrases (CAs, EC 4.2.1.1) from the pathogenic bacteria Vibrio cholerae, Mycobacterium tuberculosis, and Burkholderia pseudomallei. The primary amino acid residues that are involved in the catalytic mechanisms of these CA classes are poorly understood, although glutamic acid residues near the active
制备了六种结合了酸性氨基酸残基的三肽,作为致病菌霍乱弧菌,结核分枝杆菌和假伯克霍尔德氏菌的β-和γ-碳酸酐酶(CAs,EC 4.2.1.1)的活化剂进行研究。尽管活性位点附近的谷氨酸残基似乎参与其中,但对于这些CA类的催化机理所涉及的伯氨基酸残基知之甚少。含有Glu或Asp残基的三肽可以在0.21处有效激活VchCAβ和VchCAγ(霍乱弧菌的酶),Rv3273 CA(mtCA3,结核分枝杆菌的β-CA)和BpsCAγ(假芽孢杆菌的γ-CA)。 18.1 µM的水平。肽序列中酸性残基的位置会显着影响生物活性。对于三种酶,鉴定出比l-Glu和l-Asp都更有效的激活剂的三肽。三肽也是相对选择性的,因为它们不激活原型α-CA(人碳酸酐酶I和II)。由于人们对CA激活剂在这些传染性细菌的致病性和生命周期中的作用了解甚少,因此本研究提供了探索此类过程的新分子探针。