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ID 18563
Eprint ID
18563
FullText URL
Thumnail 72_915.pdf 365 KB
Title Alternative
A Comparative Study on the Tryptophan Metabolism of Streptomycin-sensitive and Streptomycin-resistant Shigella flexneri
Author
Kawai, Kiyoshi
Nishii, Emiko
Takahashi, Manabu
Honmatu, Kakushi
Abstract
There has been very little experimental work on the tryptophan metabolism of streptomycin-resistant bacteria. The authors performed this experiment in order to find out the differencies of the tryptophan metabolism between streptomycin-sensitive and streptmycin-resistant Shigella flexneri 2a. The results were as follows: 1. When streptomycin-resistant strains were grown in the streptomycin-containing medium, they have quantitatively lower tryptophanase activity than streptomycin-sensitive strains. 2. Streptomycin-resistant strains restores tryptophanase activity when streptomycin is absent in the growth medium, but they are resistant to streptomycin (10,000γ/ml). 3. Tryptophanase activity of both strains is inhibited slightly by divalent metal ions such as Mg, Fe, and Mn, but the inhibitive action of Cu is very remarkable. Natrium azide and arsenite have no effect. Vitamin B(6) and 2.4-dinitrophenol accerelates indole production from tryptophan by this organism. 4. Of the the various antibiotics aureomycin inhibits most markedly tryptophanase activity and chloromycetin does slightly, but streptomycin has no influence. 5. Tryptophanase is an adaptive enzyme, and considered to have essentially no relation to streptomycin-resistant mutation.
Published Date
1960-02-28
Publication Title
岡山医学会雑誌
Publication Title Alternative
Journal of Okayama Medical Association
Volume
volume72
Issue
issue3
Publisher
岡山医学会
Publisher Alternative
Okayama Medical Association
Start Page
915
End Page
919
ISSN
0030-1558
NCID
AN00032489
Content Type
Journal Article
Official Url
https://www.jstage.jst.go.jp/article/joma1947/72/3/72_3_915/_article/-char/ja/
Related Url
http://www.okayama-u.ac.jp/user/oma/
language
日本語
Copyright Holders
岡山医学会
File Version
publisher
Refereed
True
Eprints Journal Name
joma