Affiliation:
1. Institute of Molecular Biology, Faculty of Science, Nagoya University, Nagoya, Japan, and Laboratory of Genetics, Faculty of Science, University of Tokyo, Tokyo, Japan
Abstract
Bacterial hooks were partially purified from flagella isolated from
Salmonella
SJ25, by treatment with heat to depolymerize flagellar filaments and with
n
-butanol and calcium chloride to remove membranes. Antihook serum was obtained from a rabbit inoculated with a preparation of hooks. The serum contained antibodies directed against the flagellar filament and cell membrane. These antibodies could be removed from the serum by absorption with purified flagellar filaments and cells of a nonflagellated mutant strain. It was shown by electron microscopy that anti-SJ25-hook antibody reacts with hooks from a number of strains of
Salmonella
which differed from SJ25 in H and O antigens, flagellar shape, and motility. Hooks possessed by various strains of
Salmonella
have a common antigenicity. In addition, anti-SJ25-hook cross-reacted with hooks from
Escherichia coli
W3110 but did not react at all which those from strains of
Serratia, Proteus, Aerobacter
, and
Klebsiella
. It is well known that bacteria stop moving upon addition of antiflagella serum to the medium. However, the addition of purified antihook was found to have little effect on motility. At physiological ionic strength and pH, flagellin (
Salmonella
) can polymerize into flagellar filaments only in the presence of seeds. It was shown that a crude preparation of hooks was able to initiate in vitro polymerization of flagellin.
Publisher
American Society for Microbiology
Subject
Molecular Biology,Microbiology
Cited by
30 articles.
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