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dc.contributor.authorMeehan, Mary
dc.contributor.authorMuldowney, Deirdre A.
dc.contributor.authorWatkins, Naomi J.
dc.contributor.authorOwen, Peter
dc.date.accessioned2018-08-24T08:25:41Z
dc.date.available2018-08-24T08:25:41Z
dc.date.issued2000-05-01
dc.identifier.citationMeehan, Mary; Muldowney, Deirdre A. Watkins, Naomi J.; Owen, Peter (2000). Localization and characterization of the ligand-binding domain of the fibrinogen-binding protein (fgbp) of streptococcus equi subsp. equi. Microbiology 146 , 1187-1194
dc.identifier.issn1350-0872,1465-2080
dc.identifier.urihttp://hdl.handle.net/10379/9550
dc.description.abstractThe group C streptococcus Streptococcus equi subsp. equi possesses a 498-residue major cell-wall-associated protein (FgBP) which binds horse fibrinogen (Fg), reacts with convalescent horse serum and protects against lethal S. equi challenge in a small animal model. In the present study, analysis of a panel of 17 purified N- and C-terminal FgBP truncates by ligand affinity blotting and SDS-PAGE revealed that the region required for maximum binding of Fg extended over the first half of the mature protein. The C-terminal two-thirds of this domain is predicted to be alpha-helical coiled-coil and the N-terminal one-third to possess non-coiled-coil single strands. Residues at the extreme N-terminus and within the coiled-coil region are both required for ligand binding. A high incidence of alpha-helical coiled-coil structure also seems to be responsible in part for the aberrant mobility of FgBP on SDS gels. The efficiency with which FgBP binds Fg from different animal species decreases in the order horse > mouse, pig > rat > sheep, dog, bovine, human. Binding to horse Fg is inversely related to temperature over the range 45-4 degrees C and is independent of Ca(2+) ions. MS analysis provided corroborative evidence that FgBP is covalently linked to the cell wall peptidoglycan.
dc.publisherMicrobiology Society
dc.relation.ispartofMicrobiology
dc.subjectstreptococcus equi subsp equi
dc.subjectfibrinogen-binding protein
dc.subjectligand-binding domain
dc.subjectgroup-a streptococci
dc.subjectgram-positive bacteria
dc.subjecthelical coiled-coils
dc.subjectstaphylococcus-aureus
dc.subjectsurface-proteins
dc.subjectclumping factor
dc.subjectchain-length
dc.subjectcell-wall
dc.subjectpyogenes
dc.subjectstability
dc.titleLocalization and characterization of the ligand-binding domain of the fibrinogen-binding protein (fgbp) of streptococcus equi subsp. equi
dc.typeArticle
dc.identifier.doi10.1099/00221287-146-5-1187
dc.local.publishedsourcehttp://mic.microbiologyresearch.org/deliver/fulltext/micro/146/5/1461187a.pdf?itemId=/content/journal/micro/10.1099/00221287-146-5-1187&mimeType=pdf&isFastTrackArticle=
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