Baker, Barbara S. (1981) Structural studies on flagellins from shape and antigenic variants of Salmonella and Proteus flagella.
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The primary structures of flagellins from antigenic and shape variants of Salmonella and Proteus flagella were studied.
H antigenic differences in Salmonella are related to differences in amino acid composition of the flagellin molecules: peptide differences were observed between thermolytic, and between chymotryptic peptide maps of Salmonella g.... antigenic flagellins. These differences were located on the CNBr A fragments of the flagellins. Homologous CNBr A fragments were almost as effective as homologous flagella as inhibitors of antiserum raised against g.... antigenic flagella, as measured by immobilisation-inhibition and complement fixation-inhibition assays. Thus the H antigenic determinants appear to be located primarily on the CNBr A fragment, although some results suggest that they might extend onto the CNBr B fragment in certain flagellins.
The sites of amino acid substitutions in morphological mutants of Salmonella g... antigenic flagellins appear to be located at either the N-terminal (CNBr B) or C-terminal (CNBr C and CNBr D) regions of the flagellin molecule. The C-terminus of the molecule is conserved.
Several epsilon-N-methyllysine residues were detected in most of the Salmonella g.... antigenic flagellins analysed and, in fewer numbers, in certain P. morganii flagellins. The absence of E-N-methyllysine residues in flagellins of diverse bacteria was noted.
Arginine and tyrosine residues of various bacterial flagellins were differentiated by chemical modification into three groups: residues not accessible to modification; residues accessible in the monomer but not in the polymer; residues which are modified in both the monomer and polymer. Residues belonging to the second group may be implicated in the self-assembly of flagellin subunits into flagellar filaments.
Comparison of amino acid sequences of bacterial flagellins indicated sequences of homology at the N- and C-terminal regions of the flagellin molecule. These regions may be essential for the assembly of subunits into functional filaments. The central part of the molecule, however, appears to be a variable region which is exposed in the polymer and predominantly bears the H-antigenic characteristics of the bacterium.
This is a Accepted version This version's date is: 1981 This item is not peer reviewed
https://repository.royalholloway.ac.uk/items/a31a6fd1-ce89-4e93-81e5-0e18215dd649/1/
Deposited by () on 31-Jan-2017 in Royal Holloway Research Online.Last modified on 02-Feb-2017
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