Gyeongbuk Institute for Marine Bioindustry

Uljin, South Korea

Gyeongbuk Institute for Marine Bioindustry

Uljin, South Korea

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Kim K.K.,Korea Research Institute of Bioscience and Biotechnology | Lee K.C.,Korea Research Institute of Bioscience and Biotechnology | Eom M.K.,Korea Research Institute of Bioscience and Biotechnology | Kim J.-S.,Gyeongbuk Institute for Marine Bioindustry | And 4 more authors.
Antonie van Leeuwenhoek, International Journal of General and Molecular Microbiology | Year: 2014

A novel bacterial strain designated GJW-30T was isolated from soil of the lava forest, Gotjawal, located in Aewol, Jeju, Korea. Strain GJW-30T was found to be strictly aerobic, Gram-negative and to form pleomorphic, non-motile rods and white colonies on R2A agar. The major fatty acids were identified as C18:1ω7c, C16:0 and C 17:0, the predominant isoprenoid quinone as Q-10, the polar lipids as diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, an unidentified aminolipid and an unidentified lipid. The cell-wall sugar pattern of strain GJW-30T was found to be composed of glucose, ribose and rhamnose and meso-DAP as the diagnostic diamino acid in the cell-wall peptidoglycan. The DNA G+C content of strain GJW-30T is 62.2 mol%. Phylogenetic analysis, based on 16S rRNA gene sequence similarities, showed that strain GJW-30T forms a deep branch within the order Rhizobiales, sharing the highest level of sequence homology with Bradyrhizobium oligotrophicum LMG 10732T (93.6 %). On the basis of the phenotypic, chemotaxonomic and phylogenetic characteristics, strain GJW-30T is considered to represent a novel genus and species, for which the name Variibacter gotjawalensis gen. nov., sp. nov. (the type strain is GJW-30 T = KCTC 32391T = CECT 8514T = LMG 28093 T) is proposed. © 2014 Springer International Publishing.


Lee K.C.,Korea Research Institute of Bioscience and Biotechnology | Kim K.K.,Korea Research Institute of Bioscience and Biotechnology | Eom M.K.,Korea Research Institute of Bioscience and Biotechnology | Kim J.-S.,Gyeongbuk Institute for Marine Bioindustry | And 3 more authors.
International Journal of Systematic and Evolutionary Microbiology | Year: 2015

A novel bacterial strain, designated SA3-7T, was isolated from soil of a lava forest located in Jeju, Republic of Korea. Cells of strain SA3-7T were Gram-stain-negative, oxidase-and catalasepositive, non-motile rods and produced creamy white colonies on ten-fold-diluted R2A agar. The isolate contained menaquinone-7 (MK-7) as the predominant isoprenoid quinone and summed feature 3 (C16:1ω7c/C16: 1ω6c), iso-C15: 0 and iso-C17: 0 3-OH as the major fatty acids. The DNA G+C content was 43.1 mol%. Phylogenetic analysis based on 16S rRNA gene sequencing showed that strain SA3-7T was related most closely to Mucilaginibacter frigoritolerans FT22T (96.7% sequence similarity) and that it formed a separate lineage in the genus Mucilaginibacter. Combined phenotypic, chemotaxonomic and phylogenetic characteristics supported the conclusion that strain SA3-7T represents a novel species of the genus Mucilaginibacter, for which the name Mucilaginibacter gotjawali sp. nov. is proposed; the type strain is SA3-7T (=KCTC 32515T=CECT 8628T=DSM 29289T). © 2015 IUMS.


Kim M.U.,Gyeongbuk Institute for Marine Bioindustry | Cho Y.J.,Kyungpook National University | Lee S.Y.,Kangwon National University
Journal of Applied Biological Chemistry | Year: 2013

Cultured products (callus and exopolysaccharide) were obtained from suspension culture of Aloe vera callus, and the extracts of callus were further prepared with cold water or 60% ethanol solution. The ethanol extract of callus (AC) and exopolysaccharide (ACP) of 10 mg/mL exhibited the relatively higher suppression activity of 43.2-52.1% against hyaluronidase activity. Thus, their anti-inflammatory effects were further investigated using animal cell (Raw 264.7) in vitro. Though AC shows a slight suppression effect of cell survival rate (97%) using MTT assay in the presence of 400 μg/mL AC- dimethyl sulfoxide (DMSO), cell growth promotion was observed in the other samples of lower levels. It indicates that the ethanol extract of Aloe callus rarely affect cell survival rate in the ranges (200-400 μg/mL) used in the study. Using Griess reagent, the suppression of NO production by the aloe callus extract was analyzed by measuring the amount of the nitrite produced in Raw 264.7 culture activated by lipopolysaccharide (LPS). As a result, supplementation of AC-distilled water (DW) and AC-DMSO produced higher levels of NO than the positive control LPS. However, the NO suppression effect by ACP-DW was so intense that lower amount (80-100 μg/mL) suppressed NO production to the level of the control. The effect was attributed to the expression of the iNOS. Then, Raw 264.7 cells were stimulated with the LPS and expression of COX-2 protein level was analyzed depending on the Aloe suspension culture product treatment. The results showed that the ACP-DW supplemented medium did not express COX-2 by itself, and LPS stimulated COX-2 expression was slightly decreased. On the other hand, realtime-PCR analysis of the expression of inflammatory cytokine showed that IL-1β and TNF-α expression was highly suppressed in the ACP- distilled water supplemented medium. © The Korean Society for Applied Biological Chemistry 2013.


PubMed | Research Institute for Hallasan, Korea Research Institute of Bioscience and Biotechnology and Gyeongbuk Institute for Marine Bioindustry
Type: Journal Article | Journal: International journal of systematic and evolutionary microbiology | Year: 2014

A novel bacterial strain designated CB4(T) was isolated from soil from the Hallasan, Jeju, Korea. Strain CB4(T) was found to be strictly aerobic, Gram-stain-positive, rod-shaped, motile and formed creamy greyish colonies on nutrient agar. The major fatty acids were identified as iso-C(15:0) and iso-C(16:0), and the predominant isoprenoid quinone as MK-7. The cell-wall peptidoglycan contained glycine and alanine as the diagnostic amino acids and phosphatidyl-N-methylethanolamine, phosphatidylethanolamine, diphosphatidylglycerol and an unidentified aminophospholipid as the polar lipids. The genomic DNA G+C content of strain CB4(T) was 46.5 mol%. Phylogenetic analysis, based on 16S rRNA gene sequence similarities, showed that strain CB4(T) forms a deep branch within the genus Aneurinibacillus, sharing the highest level of sequence homology with Aneurinibacillus aneurinilyticus DSM 5562(T) (96.5%). On the basis of the phenotypic, chemotaxonomic and phylogenetic characteristics, strain CB4(T) is considered to represent a novel species within the genus Aneurinibacillus, for which the name Aneurinibacillus soli sp. nov. is proposed. The type strain is CB4(T) (=KCTC 33505(T)=CECT 8566(T)). An emended description of the genus Aneurinibacillus is also proposed.


Kim J.S.,Gyeongbuk Institute for Marine Bioindustry | Lee I.K.,Chonbuk National University | Yun B.S.,Chonbuk National University
PLoS ONE | Year: 2015

Yeast biosurfactants are important biotechnological products in the food industry, and they have medical and cosmeceutical applications owing to their specific modes of action, low toxicity, and applicability. Thus, we have isolated and examined biosurfactant-producing yeast for various industrial and medical applications. A rapid and simple method was developed to screen biosurfactant-producing yeasts for high production of eco-friendly biosurfactants. Using this method, several potential niches of biosurfactant-producing yeasts, such as wild flowers, were investigated. We successfully selected a yeast strain, L3-GPY, with potent surfactant activity from a tiger lily, Lilium lancifolium Thunb. Here, we report the first identification of strain L3-GPY as the black yeast Aureobasidium pullulans. In addition, we isolated a new low-surface-tension chemical, designated glycerol-liamocin, from the culture supernatant of strain L3-GPY through consecutive chromatography steps, involving an ODS column, solvent partition, silica gel, Sephadex LH-20, and an ODS Sep-Pak cartridge column. The chemical structure of glycerol-liamocin, determined by mass spectrometry and nuclear magnetic resonance spectroscopy, indicates that it is a novel compound with the molecular formula C33 H62O12. Furthermore, glycerol-liamocin exhibited potent biosurfactant activity (31 mN/m). These results suggest that glycerol-liamocin is a potential novel biosurfactantfor use in various industrial applications. Copyright: © 2015 Kim et al.


Kim M.,Gyeongbuk Institute for Marine Bioindustry | Kwon T.-H.,Gyeongbuk Institute for Marine Bioindustry | Jung S.-M.,Korea National Institute of Health | Cho S.-H.,Korea National Institute of Health | And 4 more authors.
PLoS ONE | Year: 2013

Antibiotic resistance and microbiota within edible snow crabs are important for the Chionoecetes (snow crab) fishing industry. We investigated these parameters using culture methods and antibiotic susceptibility tests with six internal organs from three species of Chionoecetes. Each sample revealed many unexpected microbial species within Chionoecetes internal organs. On the basis of 16S rRNA sequence analysis of 381 isolates, the most abundant genera identified in Chionoecetes opilio were Acinetobacter spp. (24%), Bacillus spp. (4%), Pseudomonas spp. (34%), Stenotrophomonas spp. (28%), and Agreia spp. (11%). In Chionoecetes sp. crabs, Acinetobacter spp. (23%), Bacillus spp. (12%), and Psychrobacter spp. (20%) were most prevalent, while Agreia spp. (11%), Bacillus spp. (31%), Microbacterium spp. (10%), Rhodococcus spp. (12%), and Agrococcus spp. (6%) were most abundant in C. japonicus. Our antibiotic resistance test found resistance to all nine antibiotics tested in 19, 14, and two of the isolates from C. opilio, Chionoecetes sp., and, C. japonicus respectively. Our results are the first to show that microbes with antibiotic resistance are widely distributed throughout the internal organs of natural snow crabs. © 2013 Kim et al.


Lee K.C.,Korea Research Institute of Bioscience and Biotechnology | Kim K.K.,Korea Research Institute of Bioscience and Biotechnology | Kim J.-S.,Gyeongbuk Institute for Marine Bioindustry | Kim D.-S.,World Heritage And Mt Hallasan Research Institute | And 4 more authors.
International Journal of Systematic and Evolutionary Microbiology | Year: 2016

A novel bacterial strain, Back-11T, was isolated from sediment soil of a crater lake, Baekrokdam, Hallasan, Jeju, Republic of Korea. Cells of strain Back-11T were Gram-stain-positive, motile, endospore-forming, rod-shaped and oxidase-and catalase-positive. It contained anteiso-C15: 0 as the major fatty acid, menaquinone-7 (MK-7) as the predominant isoprenoid quinone, diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and four unidentified aminophospholipids as the main polar lipids, and meso-diaminopimelic acid as the diagnostic diamino acid in the cell-wall peptidoglycan. The DNA G+C content was 45.3 mol%. Phylogenetic analysis, based on 16S rRNA gene sequencing, showed that strain Back-11T was most closely related to Paenibacillus taihuensis THMBG22T (95.5 % similarity) and fell into a clade in the genus Paenibacillus. On the basis of phylogenetic, chemotaxonomic and phenotypic data, strain Back-11T represents a novel species in the genus Paenibacillus, for which the name Paenibacillus baekrokdamisoli sp. nov. is proposed. The type strain is Back-11T (5KCTC 33723T=CECT 8890T). © 2016 IUMS.


PubMed | Macrogen Inc. and Gyeongbuk Institute for Marine Bioindustry
Type: Journal Article | Journal: Genome announcements | Year: 2015

Meyerozyma caribbica MG20W was originally isolated from rhizosphere soil on reclaimed land in the Republic of Korea. We describe herein the 10.64-Mbp-long genome sequence of M. caribbica MG20W, which exhibits high salt resistance.


PubMed | Chuncheon Bioindustry Foundation, Gyeongbuk Institute for Marine Bioindustry, Kangwon National University and Andong National University
Type: Journal Article | Journal: Marine drugs | Year: 2016

Phlorofucofuroeckol A (PFF-A), one of the phlorotannins found in brown algae, has been reported to exert anti-cancer property. However, the molecular mechanism for the anti-cancer effect of PFF-A has not been known. Activating transcription factor 3 (ATF3) has been reported to be associated with apoptosis in colorectal cancer. The present study was performed to investigate the molecular mechanism by which PFF-A stimulates ATF3 expression and apoptosis in human colorectal cancer cells. PFF-A decreased cell viability through apoptosis of human colorectal cancer cells. PFF-A increased ATF3 expression through regulating transcriptional activity. The responsible cis-element for ATF3 transcriptional activation by PFF-A was cAMP response element binding protein (CREB), located between positions -147 and -85 of the ATF3 promoter. Inhibition of p38, c-Jun N-terminal kinases (JNK), glycogen synthase kinase (GSK) 3, and IB kinase (IKK)- blocked PFF-A-mediated ATF3 expression. ATF3 knockdown by ATF3 siRNA attenuated the cleavage of poly (ADP-ribose) polymerase (PARP) by PFF-A, while ATF3 overexpression increased PFF-A-mediated cleaved PARP. These results suggest that PFF-A may exert anti-cancer property through inducing apoptosis via the ATF3-mediated pathway in human colorectal cancer cells.


PubMed | Chonbuk National University and Gyeongbuk Institute for Marine Bioindustry
Type: Journal Article | Journal: PloS one | Year: 2015

Yeast biosurfactants are important biotechnological products in the food industry, and they have medical and cosmeceutical applications owing to their specific modes of action, low toxicity, and applicability. Thus, we have isolated and examined biosurfactant-producing yeast for various industrial and medical applications. A rapid and simple method was developed to screen biosurfactant-producing yeasts for high production of eco-friendly biosurfactants. Using this method, several potential niches of biosurfactant-producing yeasts, such as wild flowers, were investigated. We successfully selected a yeast strain, L3-GPY, with potent surfactant activity from a tiger lily, Lilium lancifolium Thunb. Here, we report the first identification of strain L3-GPY as the black yeast Aureobasidium pullulans. In addition, we isolated a new low-surface-tension chemical, designated glycerol-liamocin, from the culture supernatant of strain L3-GPY through consecutive chromatography steps, involving an ODS column, solvent partition, silica gel, Sephadex LH-20, and an ODS Sep-Pak cartridge column. The chemical structure of glycerol-liamocin, determined by mass spectrometry and nuclear magnetic resonance spectroscopy, indicates that it is a novel compound with the molecular formula C33H62O12. Furthermore, glycerol-liamocin exhibited potent biosurfactant activity (31 mN/m). These results suggest that glycerol-liamocin is a potential novel biosurfactantfor use in various industrial applications.

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