title: The P histo-blood group-related glycosphingolipid sialosyl galactosyl globoside as a preferred binding receptor for uropathogenic Escherichia coli: isolation and structural characterization from human kidney.
abstract: The P histo-blood group-related glycosphingolipid, sialosyl galactosyl globoside (SGG), has recently been implicated as a preferred binding receptor for uropathogenic Escherichia coli [Stapleton, A. E., Stroud, M. R., Hakomori, S., and Stamm, W. E. (1998) Infect. Immun. 66, 3856-3861]. We report here the purification and complete structural characterization of SGG from normal human kidney. Using metabolically [35S]-labeled E. coli as a probe, a monosialylated glycosphingolipid was isolated to homogeneity. The glycosphingolipid was purified by a combination of high-performance liquid chromatography and preparative high-performance thin-layer chromatography and its structure unambiguously elucidated by 1H NMR, electrospray ionization mass spectrometry, and methylation analysis. Its primary structure was shown to be identical to a previously characterized, developmentally regulated, globo-series glycolipid thought to be unique to human teratocarcinoma. The significance of this structure as a unique receptor in human kidney for uropathogenic E. coli and its role in the pathogenesis of urinary tract infections are discussed.
authors.affiliation: Department of Cell Surface Biochemistry, Northwest Hospital, Seattle, Washington 98125, USA. stroud@u.washington.edu
authors.forename: M R
authors.initials: MR
authors.lastname: Stroud
authors.forename: A E
authors.initials: AE
authors.lastname: Stapleton
authors.forename: S B
authors.initials: SB
authors.lastname: Levery
mesh_terms: D002236:Carbohydrate Conformation; D002240:Carbohydrate Sequence; D004926:Escherichia coli / Q000378:metabolism* / Q000472:pathogenicity; D004927:Escherichia coli Infections / Q000209:etiology / Q000378:metabolism*; D005732:Gangliosides / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D007668:Kidney / Q000737:chemistry* / Q000378:metabolism; D013058:Mass Spectrometry; D008745:Methylation; D008969:Molecular Sequence Data; D019906:Nuclear Magnetic Resonance, Biomolecular; D010127:P Blood-Group System / Q000737:chemistry / Q000378:metabolism*; D011956:Receptors, Cell Surface / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D014552:Urinary Tract Infections / Q000209:etiology / Q000378:metabolism*
chemical_list: D005732:Gangliosides; D010127:P Blood-Group System; D011956:Receptors, Cell Surface; C033639:glycolipid receptor; C086047:disialosyl galactosyl globoside