MSK
Search
- Page Path
- HOME > Search
Journal Article
- Deinococcus sedimenti sp. nov. isolated from river sediment
- Jae-Jin Lee , Yeon-Hee Lee , Su-Jin Park , Sangyong Lim , Sun-Wook Jeong , Seung-Yeol Lee , Sangkyu Park , Hyo-Won Choi , Myung Kyum Kim , Hee-Young Jung
- J. Microbiol. 2016;54(12):802-808. Published online November 26, 2016
- DOI: https://doi.org/10.1007/s12275-016-6361-8
- 12 View
- 0 Download
- 5 Citations
-
Abstract
- A novel Gram-positive, oval-shaped, non-motile bacterium designated strain 16F1LT was isolated from sediment collected from the Han River in Seoul, Republic of Korea. Based on the 16S rRNA gene sequence (1,448 bp), this strain was identified as a member of the genus Deinococcus that belongs to the class Deinococci. Similarities in the 16S rRNA gene sequence were shown with Deinococcus daejeonensis MJ27T (99.0%), D. grandis DSM 3963T (98.1%), D. radiotolerans C1T (97.5%), and D. caeni Ho-08T (97.2%). Strain 16F1LT was classified as a different genomic species from closely related Deinococcus members, based on less than 70% DNA-DNA relatedness. Genomic DNA G+C content of strain 16F1LT was 67.2 mol%. Strain 16F1LT was found to grow at temperatures of 10–37°C (optimum 25°C) and pH 7–8 (optimum pH 7) on R2A medium, and was catalase-positive and oxidase-negative. Strain 16F1LT showed resistance to gamma radiation (D10 > 2 kGy). In addition, this strain had the following chemotaxonomic characteristics: the major fatty acids were C15:1 ω6c and C16:1 ω7c; the polar lipid profile contained phosphoglycolipids, unknown aminophospholipids, an unknown aminoglycolipid, unknown aminolipids, an unknown glycolipid, an unknown phospholipid, and an unknown polar lipid; the major quinone was MK-8. Phylogenetic, genotypic, phenotypic, and chemotaxonomic characteristics indicated that strain 16F1LT represents a novel species within the genus Deinococcus, for which the name Deinococcus sedimenti sp. nov. is proposed. The type strain is 16F1LT (=KCTC 33796T =JCM 31405T).
- Mutation Spectrum of Manganese (II) Peroxidase Gene in the Pleurotusostreatus Mutants Induced by Gamma Radiation
- Hwa-Hyoung Chang^ , Young-Keun Lee^ , Jae-Sung Kim^ , Ki-Sung Lee^ , Kyu Seong Cho^
- J. Microbiol. 2003;41(1):52-57.
- 13 View
- 0 Download
-
Abstract
- The mutational spectra in the manganese (II) peroxidase gene (mnp) of the Pleurotus ostreatus mutants induced by gamma radiation (Co^60) give evidence to prove the effect of gamma radiation on the gene. mnp of each mutant was cloned, sequenced and analyzed. Among the 1941 base pairs of the sequenced region of the mnp genes of 4 mutants (PO-5, -6, -15 and -16), nine mutational hotspots on which the same base was mutated simultaneously were found, additionally 6 mutations were also found at different positions in the mnp gene. These mutation-spectra were predominantly A:T_G:C transitions (50.1%). By the analysis of putative amino acid sequences, PO-5 and PO-16 mutants have 3 and 1 mutated residues, respectively. Since the mutational spectra reported herein are specific to the mnp gene, we propose that the mutational hotspots for the gamma radiation could be in the gene(s) within cells.
First
Prev
TOP
