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Crystal structures of apo-DszC and FMN-bound DszC from Rhodococcuserythropolis D-1

机译:Rhodococcuserythropolis D-1的apo-DszC和FMN结合的DszC的晶体结构

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The release of SO2 from petroleum products derived from crude oil, which contains sulfur compounds such as dibenzothiophene (DBT), leads to air pollution. The 4S' metabolic pathway catalyzes the sequential conversion of DBT to 2-hydroxybiphenyl via three enzymes encoded by the dsz operon in several bacterial species. DszC (DBT monooxygenase), from Rhodococcuserythropolis D-1 is involved in the first two steps of the 4S' pathway. Here, we determined the first crystal structure of FMN-bound DszC, and found that two distinct conformations occur in the loop region (residues 131-142) adjacent to the active site. On the basis of the DszC-FMN structure and the previously reported apo structures of DszC homologs, the binding site for DBT and DBT sulfoxide is proposed.
机译:原油衍生的石油产品中释放的SO2含有二苯并噻吩(DBT)等硫化合物,会导致空气污染。 4S'的代谢途径通过dsz操纵子在几种细菌物种中编码的三种酶催化DBT依次转化为2-羟基联苯。来自红红球菌D-1的DszC(DBT单加氧酶)参与了4S'途径的前两个步骤。在这里,我们确定了FMN结合DszC的第一个晶体结构,并发现两个不同的构象发生在与活动位点相邻的环区域(残基131-142)中。基于DszC-FMN结构和先前报道的DszC同源物的载脂蛋白结构,提出了DBT和DBT亚砜的结合位点。

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