Fragment Growing to Design Optimized Inhibitors for Human Blood Group B Galactosyltransferase (GTB).

Fragment Growing to Design Optimized Inhibitors for Human Blood Group B Galactosyltransferase (GTB). ChemMedChem. 2019 Jun 17;: Authors: Strecker C, Peters H, Hackl T, Peters T, Meyer B Abstract Human blood group B galactosyltransferase (GTB) catalyzes the galactosylation of the H antigen and is responsible for the formation of the blood group antigen of phenotype B. The ABO blood group system is well studied and routinely serotyped before transfusion and transplantation. Blood type subgroups have been repeatedly linked to an increased occurrence of diseases (e.g. a highly increased incidence rate for pancreatic cancer for individuals with blood group phenotype B). 3-Phenyl-5-(piperazin-1-yl)-1,2,4-thiadiazole 1 has previously been described to inhibit GTB with a Ki = 800 μM. In this work, we describe a fragment growing approach for the optimization of this fragment. In this work, we describe a computer guided fragment growing approach that subsequently was realized by synthesizing the most promising ligands. Enlarging the phenyl moiety of fragment 1 to a naphthyl moiety resulted in ligand 2a that shows a threefold improvement in binding affinity (Ki = 271 μM). PMID: 31207161 [PubMed - as supplied by publisher]
Source: ChemMedChem - Category: Chemistry Authors: Tags: ChemMedChem Source Type: research