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Comparative Characterization of Spirosomes Isolated from Lactobacillus brevis, Lactobacillus fermentum , and Lactobacillus buchneri
Author(s) -
Nomura Shuichi,
Masuda Kuniyoshi,
Kawata Tomio
Publication year - 1989
Publication title -
microbiology and immunology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.664
H-Index - 70
eISSN - 1348-0421
pISSN - 0385-5600
DOI - 10.1111/j.1348-0421.1989.tb01494.x
Subject(s) - lactobacillus fermentum , lactobacillus buchneri , lactobacillus brevis , biology , lactobacillus , microbiology and biotechnology , lactobacillaceae , bacteria , food science , lactic acid , fermentation , lactobacillus plantarum , genetics
Spirosomes, cytoplasmic fine spirals, were isolated and purified from Lactobacillus brevis ATCC 8287, L. fermentum F‐1, and L. buchneri ATCC 4005, and their morphological, biochemical, and immunological properties were investigated. The spirosomes of these lactobacilli were morphologically indistinguishable from one another, and they had the same buoyant density of 1.320 g/cm 3 in CsCl. All of the spirosomes were composed of a single protein, spirosin, with an apparent molecular weight of about 95,000 for L. brevis and L. fermentum and of about 96,000 for L. buchneri as estimated by sodium dodecyl sulfate‐polyacrylamide gel electrophoresis (SDS‐PAGE). The spirosins from the three lactobacilli were compared by peptide mapping on SDS‐PAGE after cleavage with N ‐chlorosuccinimide and limited proteolysis with Staphylococcus aureus V8 protease. The peptide map of the L. brevis spirosin was identical with that of the L. fermentum spirosin, whereas it was markedly different from the L. buchneri spirosin. The amino acid composition of the L. brevis spirosin was almost similar to that of the L. fermentum spirosin, while it differed appreciably from the L. buchneri spirosin. Using antiserum against the L. brevis spirosin, immunodiffusion test revealed that the antigenicity of the spirosomes from L. brevis was identical with that from L. fermentum , whereas it was partially different from that from L. buchneri.