title: Chemical proteomics with sulfonyl fluoride probes reveals selective labeling of functional tyrosines in glutathione transferases.
abstract: Chemical probes have great potential for identifying functional residues in proteins in crude proteomes. Here we studied labeling sites of chemical probes based on sulfonyl fluorides (SFs) on plant and animal proteomes. Besides serine proteases and many other proteins, SF-based probes label Tyr residues in glutathione transferases (GSTs). The labeled GSTs represent four different GST classes that share less than 30% sequence identity. The targeted Tyr residues are located at similar positions in the promiscuous substrate binding site and are essential for GST function. The high selectivity of SF-based probes for functional Tyr residues in GSTs illustrates how these probes can be used for functional studies of GSTs and other proteins in crude proteomes.
authors.affiliation: The Plant Chemetics Laboratory, Max Planck Institute for Plant Breeding Research, Carl-von-Linne Weg 10, 50829 Cologne, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Gu
authors.forename: D Alexander
authors.initials: DA
authors.lastname: Shannon
authors.forename: Tom
authors.initials: T
authors.lastname: Colby
authors.forename: Zheming
authors.initials: Z
authors.lastname: Wang
authors.forename: Mohammed
authors.initials: M
authors.lastname: Shabab
authors.forename: Selva
authors.initials: S
authors.lastname: Kumari
authors.forename: Joji Grace
authors.initials: JG
authors.lastname: Villamor
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: McLaughlin
authors.forename: Eranthie
authors.initials: E
authors.lastname: Weerapana
authors.forename: Markus
authors.initials: M
authors.lastname: Kaiser
authors.forename: Benjamin F
authors.initials: BF
authors.lastname: Cravatt
authors.forename: Renier A L
authors.initials: RA
authors.lastname: van der Hoorn
mesh_terms: D000818:Animals; D001665:Binding Sites; D005982:Glutathione Transferase / Q000737:chemistry / Q000378:metabolism*; D007700:Kinetics; D051379:Mice; D017434:Protein Structure, Tertiary; D020543:Proteome / Q000378:metabolism; D040901:Proteomics; D013441:Sulfinic Acids / Q000737:chemistry*; D014443:Tyrosine / Q000737:chemistry* / Q000378:metabolism
chemical_list: D020543:Proteome; D013441:Sulfinic Acids; D014443:Tyrosine; C048899:sulfuryl fluoride; D005982:Glutathione Transferase