Characterization of the filamentous hemagglutin from Bordetella pertussis by gel electrophoresis |
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| Authors: | Birgit An der Lan James L Cowell Don G Burstyn Charles R Manclark Andreas Chrambach |
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| Institution: | (1) Division of Bacterial Products, Center for Drugs and Biologics, Food and Drug Administration, National Institute of Child Health and Human Development, National Institutes of Health, 20892 Bethesda, Maryland, USA;(2) Section on Macromolecular Analysis, Laboratory of Theoretical and Physical Biology, National Institute of Child Health and Human Development, National Institutes of Health, 20892 Bethesda, Maryland, USA;(3) Bldg. 10, Rm.8C413, NIH, 20892 Bethesda, MD, USA |
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| Abstract: | Summary A highly purified preparation of filamentous hemagglutinin (FHA) from Bordetella pertussis was analyzed for its protein composition by gel electrophoretic methods. In this preparation of FHA the following native species could be detected by polyacrylamide gel electrophoresis (PAGE) at pH 3.2: S, and S2 (inactive subunits or fragments); two monomers, a major form designated Ia (144K), and a minor form lb, differing only in net charge; and three oligomeric forms, designated II (213K), III (595K) and IV (1064K). Hemagglutinating activity was associated predominantly with component Ia. PAGE of FHA after derivatization with sodium dodecyl sulfate (SDS) showed there to be three major species, designated A, C and D. According to estimated molecular weight values, A, C and D are likely to correspond to S2, Ia and II respectively. Isolated components II, III and IV yield all three SDS-species upon derivatization with SDS. Both moving boundary electrophoresis and gel electrofocusing showed hemagglutinating FHA to be a basic protein. Its apparent pI is 8.1. |
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| Keywords: | Hemagglutinin-filamentous gel electrofocusing gel electrophoresis-quantitative pertussis SDS-polyacrylamide gel electrophoresis |
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