Woongsic Jung

Korea Polar Research Institute

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Han‐Gu Choi

Korea Polar Research Institute

Se Jong Han

Korea University of Science and Technology

Eun Jae Kim

Kyung Hee University

Sanghee Kim

Korea Polar Research Institute

Suyoun Lim

Korea Polar Research Institute

Sung‐Ho Kang

Korea Polar Research Institute

Hak Jun Kim

Electronics and Telecommunications Research Institute

EonSeon Jin

Hanyang University

Sung‐Ho Kang

Korea Polar Research Institute

Yunho Gwak

Hanyang University

Cooperative Institutions

Korea Polar Research Institute

Korea Institute of Ocean Science and Technology

Hanyang University

Seoul National University

Korea University of Science and Technology

Catholic University of Korea

Yonsei University

Korea Advanced Institute of Science and Technology

Kyungpook National University

Korea University

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Production of Antifreeze Proteins by Cold-Adapted Yeasts

Springer eBooks (2013)

Hak Jun Kim Jun Hyuck Lee Hackwon Do Woongsic Jung

Antifreeze protein

Psychrophile

Antifreeze

10.1007/978-3-642-39681-6_12

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Citations (7)

Morphology and Molecular Data for Antarctic Cryophilic Microalga, Porosira pseudodenticulata

ALGAE (2006)

Woongsic Jung Hyoung-Min Joo Sung-Soo Hong Jae-Shin Kang Han‐Gu Choi

서 론 남극은 지구에서 다섯 번째로 큰 대륙이며, 일년 내내 낮 은 기온과 강한 바람이 존재하는 지역이다.북극 역시 남극 과 유사한 환경을 가지고 있고, 이러한 극한의 환경에서 많 은 생물들이 살아가고 있다.남극해의 경우 일사량의 연중 변화가 커서 해빙 분포의 계 절적 변화가 심해 식물플랑크톤의 생물량 및 생장률이 시간 적, 공간적으로 해빙의 분포에 큰 영향을 받는다(강 등 2000).식물플랑크톤 중 해빙에 존재하는 규조류를 호냉성 규조류라 하고 이 규조류는 해수 유빙의 아래 표면 또는 내 부에 노란색에서 갈색을 띠고 있으며, 중심규조보다 우상규 조가 우점하고 있다.최근 남극해에 생육하는 호냉성 규조류 인 Navicula glaciei와 N

Morphology

10.4490/algae.2006.21.2.169

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Citations (2)

An intracellular antifreeze protein from an Antarctic microalga that responds to various environmental stresses

The FASEB Journal (2014)

Yunho Gwak Woongsic Jung Yew Lee Ji Sook Kim Chul Geun Kim

The structure and function of the Antarctic marine diatom Chaetoceros neogracile antifreeze protein (Cn-AFP), as well as its expression levels and characteristics of the ice-binding site, were analyzed in the present study. In silico analysis revealed that the Cn-AFP promoter contains both light- and temperature-responsive elements. Northern and Western blot analyses demonstrated that both Cn-AFP transcript and protein expression were strongly and rapidly stimulated by freezing, as well as temperature and high light stress. Immunogold labeling revealed that Cn-AFP is preferentially localized to the intracellular space near the chloroplast membrane. Recombinant Cn-AFP had clear antifreeze activity. Protein-folding simulation was used to predict the putative ice-binding sites in Cn-AFP, and site-directed mutagenesis of the Cn-AFP b-face confirmed their identification.—Gwak, Y., Jung, W., Lee, Y., Kim, J. S., Kim, C. G., Ju, J.-H., Song, C., Hyun, J.-K., Jin, E. An intracellular antifreeze protein from an Antarctic microalga that responds to various environmental stresses. FASEB J. 28, 4924–4935 (2014). www.fasebj.org

Antifreeze protein

Immunogold labelling

Chlamydomonas reinhardtii

Antifreeze

Psychrophile

10.1096/fj.14-256388

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Citations (18)

Cultivation and Lipid Formation of a Green Microalgae, Chlamydomonas sp. ArM0029B, Isolated from Arctic Sea Ice

한국생물공학회 학술대회 (2014)

Eun Jae Kim Woongsic Jung Suyoun Lim Sanghee Kim Se Jong Han

Chlamydomonas

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Citations (0)

Distribution of ice activities among polar microalgae

Hye Young Kwon Hak Jun Kim Soo Young Lee Sung‐Ho Kang Woongsic Jung

Ursus maritimus

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Citations (0)

Isolation and Lipid Analysis of Chlamydomonas sp. KNM0029C from Arctic Sea Ice

한국생물공학회 학술대회 (2015)

Eun Jae Kim Woongsic Jung Suyoun Lim Sanghee Kim Han‐Gu Choi

Chlamydomonas

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Antifreeze Protein-Covered Surfaces

Springer eBooks (2020)

Woongsic Jung Young‐Pil Kim EonSeon Jin

Antifreeze protein

Antifreeze

Frost (temperature)

Ice formation

Icing conditions

10.1007/978-3-030-41948-6_13

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Citations (3)

Characterization of Stearoyl-CoA Desaturases from a Psychrophilic Antarctic Copepod, Tigriopus kingsejongensis

Marine Biotechnology (2016)

Woongsic Jung Eun Jae Kim Se Jong Han Han‐Gu Choi Sanghee Kim

Psychrophile

10.1007/s10126-016-9714-8

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Citations (6)

Cellular growth and fatty acid content of Arctic chlamydomonadalean

ALGAE (2016)

Woongsic Jung Eun Jae Kim Suyoun Lim Hyunji Sim Se Jong Han

Arctic microalgae thrive and support primary production in extremely cold environment. Three Arctic green microalgal strains collected from freshwater near Dasan Station in Ny-Alesund, Svalbard, Arctic, were analyzed to evaluate the optimal growth conditions and contents of fatty acids. The optimal growth temperature for KNF0022, KNF0024, and KNF0032 was between 4 and 8Â°C. Among the three microalgal strains, KNF0032 showed the maximal cell number of 1.6 Ã 107 cells mLâ1 at 4Â°C. The contents of fatty acids in microalgae biomass of KNF0022, KNF0024, and KNF0032 cultured for 75 days were 37.34, 73.25, and 144.35 mg gâ1 dry cell weight, respectively. The common fatty acid methyl esters (FAMEs) analyzed from Arctic green microalgae consisted of palmitic acid methyl ester (C16:0), 5,8,11-heptadecatrienoic acid methyl ester (C17:3), oleic acid methyl ester (C18:1), linoleic acid methyl ester (C18:2), and Î±-linolenic acid methyl ester (C18:3). KNF0022 had high levels of heptadecanoic acid methyl ester (26.58%) and heptadecatrienoic acid methyl ester (22.17% of the total FAMEs). In KNF0024 and KNF0032, more than 72.09% of the total FAMEs consisted of mono- and polyunsaturated fatty acids. Oleic acid methyl ester from KNF0032 was detected at a high level of 20.13% of the FAMEs. Arctic freshwater microalgae are able to increase the levels of polyunsaturated fatty acids under a wide range of growth temperatures and can also be used to produce valuable industrial materials. Key words: Arctic; chlamydomonadalean; fatty acid methyl ester; microalgae; psychrophilic

Linolenic acid

Dry weight

10.4490/algae.2016.31.2.8

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Citations (6)

Draft Genome Sequence of Pseudomonas pelagia CL-AP6, a Psychrotolerant Bacterium Isolated from Culture of Antarctic Green Alga Pyramimonas gelidicola

Genome Announcements (2013)

Hye Yeon Koh Woongsic Jung Hackwon Do Sung Gu Lee Jun Hyuck Lee

Pseudomonas pelagia CL-AP6, isolated from a culture of the Antarctic green alga Pyramimonas gelidicola, is a psychrotolerant bacterium. Here, we report the draft genome sequence of this strain, which may provide insights into the mutualistic interaction between microalgae and bacteria in sea ice, as well as the cold adaptation mechanisms of bacteria.

10.1128/genomea.00699-13

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Citations (5)