Journal of Microbiology

Research Support, Non-U.S. Gov'ts

Pedobacter namyangjuensis sp. nov. Isolated from Soil and Reclassification of Nubsella zeaxanthinifaciens Asker et al. 2008 as Pedobacter zeaxanthinifaciens comb. nov.: Dong-Uk Kim , Yoo-Jeong Kim , Dong-Hyeon Shin , Hang-Yeon Weon , Soon-Wo Kwon , Chi-Nam Seong , Jong-Ok Ka; J. Microbiol. 2013;51(1):25-30. Published online March 2, 2013; DOI: https://doi.org/10.1007/s12275-013-2231-9

39 View
0 Download
15 Scopus

Abstract: A Gram-stain-negative, non-motile, strictly aerobic, yellowpigmented bacterium, designated strain 5G38T, was isolated from a field cultivated with Chinese cabbage in Korea. The strain grew at 5–40°C and at pH 6.0–8.0. 16S rRNA gene sequence analysis revealed that strain 5G38T represented a distinct lineage within the family Sphingobacteriaceae and showed the highest 16S rRNA gene sequence similarity of 95.2% with Pedobacter koreensis WPCB189T, followed by Pedobacter agri PB92T (94.6%), Pedobacter suwonensis 15-52T (94.4%), Pedobacter rhizosphaerae 01-96T (94.4%), Pedobacter sandarakinus DS-27T (94.4%), and Nubsella zeaxanthinifaciens TDMA-5T (94.3%). Strain 5G38T formed monophyletic clade with Nubsella zeaxanthinifaciens in the cluster comprised of species of the genus Pedobacter. Chemotaxonomic characteristics of the novel strains, including DNA G+C content of genomic DNA (37.0 mol%), the predominant respiratory quinine (MK-7), and the major fatty acids which were iso-C15:0, summed feature 3 (comprising C16:1ω7c and/or iso-C15:0 2-OH) and iso-C17:0 3-OH, are similar to those of the genus Pedobacter. However, the novel strains can be distinguished from the other species of Pedobacter by physiological properties. The name Pedobacter namyangjuensis sp. nov. is therefore proposed for strain 5G38T (KACC 13938T =NBRC 107692T) as the type strain. Furthermore, the reclassification of Nubsella zeaxanthinifaciens as Pedobacter zeaxanthinifaciens comb. nov. is proposed.

NOTE] Identification of Genes That Are Dispensable for Animal Infection by Salmonella typhimurium: Hyun-Ju Kim , Hyon E. Choy; J. Microbiol. 2010;48(3):399-403. Published online June 23, 2010; DOI: https://doi.org/10.1007/s12275-010-9332-5

28 View
0 Download
1 Scopus

Abstract: In the current study, we generated a pool of Salmonella typhimurium mutants using the Tn10d-cam minitransposon. This pool of mutants was administered to BALB/c mice through the oral route, and bacteria were recovered from the spleen 3 days post-infection. After three rounds of serial passage, we observed enrichment of two insertion mutants, a yddG insertion and an amyA insertion. These two genes have been implicated in growth on plant products (amyA) and survival in the presence of paraquat (yddG), both of which are natural environments for Salmonella. Thus, while in vivo expression technology has identified S. typhimurium genes that are absolutely necessary for animal infection, other genes involved in vegetative growth also appear to play role in the establishment of pathogenesis.

First
Prev
Page of 1
Next
Last

Search