title: Bcl-XL-templated assembly of its own protein-protein interaction modulator from fragments decorated with thio acids and sulfonyl azides.
abstract: Protein-protein interactions have key importance in various biological processes and modulation of particular protein-protein interactions has been shown to have therapeutic effects. However, disrupting or modulating protein-protein interactions with low-molecular-weight compounds is extremely difficult due to the lack of deep binding pockets on protein surfaces. Herein we describe the development of an unprecedented lead synthesis and discovery method that generates only biologically active compounds from a library of reactive fragments. Using the protein Bcl-XL, a central regulator of programmed cell death, we demonstrated that an amidation reaction between thio acids and sulfonyl azides is applicable for Bcl-XL-templated assembly of inhibitory compounds. We have demonstrated for the first time that kinetic target-guided synthesis can be applied not only on enzymatic targets but also for the discovery of small molecules modulating protein-protein interactions.
authors.affiliation: Department of Chemistry, University of South Florida, CHE205, 4202 East Fowler Avenue, Tampa, Florida 33620, USA.
authors.forename: Xiangdong
authors.initials: X
authors.lastname: Hu
authors.forename: Jiazhi
authors.initials: J
authors.lastname: Sun
authors.forename: Hong-Gang
authors.initials: HG
authors.lastname: Wang
authors.forename: Roman
authors.initials: R
authors.lastname: Manetsch
mesh_terms: D001386:Azides / Q000737:chemistry*; D001665:Binding Sites; D002384:Catalysis; D020650:Combinatorial Chemistry Techniques / Q000379:methods; D007700:Kinetics; D008958:Models, Molecular; D015394:Molecular Structure; D011485:Protein Binding; D020033:Protein Isoforms / Q000737:chemistry; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D013441:Sulfinic Acids / Q000737:chemistry*; D013449:Sulfonamides / Q000138:chemical synthesis / Q000737:chemistry; D051020:bcl-X Protein / Q000737:chemistry*
chemical_list: D001386:Azides; D020033:Protein Isoforms; D013438:Sulfhydryl Compounds; D013441:Sulfinic Acids; D013449:Sulfonamides; D051020:bcl-X Protein