title: Characterization of peptides bound to the class I MHC molecule HLA-A2.1 by mass spectrometry.
abstract: Antigens recognized by T cells are expressed as peptides bound to major histocompatibility complex (MHC) molecules. Microcapillary high-performance liquid chromatography-electrospray ionization-tandem mass spectrometry was used to fractionate and sequence subpicomolar amounts of peptides isolated from the MHC molecule HLA-A2.1. Of 200 different species quantitated, eight were sequenced and four were found in cellular proteins. All were nine residues long and shared a distinct structural motif. The sensitivity and speed of this approach should enhance the analysis of peptides from small quantities of virally infected and transformed cells as well as those associated with autoimmune disease states.
authors.affiliation: Department of Chemistry, University of Virginia, Charlottesville 22903.
authors.forename: D F
authors.initials: DF
authors.lastname: Hunt
authors.forename: R A
authors.initials: RA
authors.lastname: Henderson
authors.forename: J
authors.initials: J
authors.lastname: Shabanowitz
authors.forename: K
authors.initials: K
authors.lastname: Sakaguchi
authors.forename: H
authors.initials: H
authors.lastname: Michel
authors.forename: N
authors.initials: N
authors.lastname: Sevilir
authors.forename: A L
authors.initials: AL
authors.lastname: Cox
authors.forename: E
authors.initials: E
authors.lastname: Appella
authors.forename: V H
authors.initials: VH
authors.lastname: Engelhard
mesh_terms: D000595:Amino Acid Sequence; D000941:Antigens / Q000737:chemistry / Q000276:immunology / Q000378:metabolism*; D002460:Cell Line; D002851:Chromatography, High Pressure Liquid; D015789:HLA-A2 Antigen / Q000378:metabolism*; D006801:Humans; D007163:Immunosorbent Techniques; D013058:Mass Spectrometry; D008969:Molecular Sequence Data; D010455:Peptides / Q000737:chemistry / Q000276:immunology / Q000378:metabolism*; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000941:Antigens; D015789:HLA-A2 Antigen; D010455:Peptides