• Title/Summary/Keyword: 지방산합성효소

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식물성 유지의 phytosterol, tocopherol 분석 및 CLA를 함유한 재구성 지질의 합성

  • 조은진;이기택
    • Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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    • 2003.04a
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    • pp.103.2-104
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    • 2003
  • 식물종자 중 참깨, 호두, 통밀, 미강 등을 원료로 하여 8$0^{\circ}C$, soxhlet extractor에서 6시간 동안 추출하여 수율을 알아본 후, 추출된 유지의 지방산 조성을 분석하고, phytosterol 및 tocopherol의 함량을 비교.분석하였다. 추출결과, 호두가 56.11%로 가장 높은 수율을 보였으며, 그 뒤로 참깨, 미강, 통밀 등이 각각 35.65, 14.83, 1.56% 등을 나타내었다. GC에 의한 지방산 조성 분석 결과, 추출된 식물유지 모두 linoleic acid, oleic acid등이 각각 평균 45.19, 32.70% 등으로 가장 높은 비율을 차지하였으며, 그 뒤로 palmitic acid, linolenic acid, stearic acid 등이 각각 평균 14.97, 3.52, 2.95 ㏖% 등의 비율을 나타내었다. GC에 의한 phytosterol 분석결과, 참깨, 호두, 통밀, 미강 등의 총 phytosterol 함량은 평균 1.20%의 비율을 보였고, HPLC에 의한 tocopherol 분석결과, 총 tocopherol 함량은 평균 1.52%의 함량을 보이는 것으로 조사되었다. 한편, 추출된 식물성유지 4종과 Conjugated linoleic acid (CLA)를 각각 1:3 ㏖ 비율로 혼합한 후 고정화 효소인 IM60과 24시간 동안 반응하여 재구성지질을 합성하고 GC에 의해 지방산 조성을 분석하였다. 총 CLA의 함량이 가장 많은 것은 통밀로서 23.75㏖%를 나타내었고, 그 뒤로 미강, 호두, 참깨 등이 각각 19.15, 16.28, 13.46㏖% 등의 함량을 나타내는 것으로 조사되었다.

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Application of DNA marker related with marbling score in Hanwoo cow (한우 암소에서 근내지방도 관련 DNA 마커의 활용)

  • Lee, Yoonseok
    • Journal of the Korean Data and Information Science Society
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    • v.27 no.3
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    • pp.733-739
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    • 2016
  • The aim of this study was to evaluate combination of each of g.15532 C>A, g.17924 G>A SNP of FASN gene and beef quality grade of progeny in Hanwoo cow. In order to analyze the SNPs, genomic DNA was obtained from 270 Hanwoo cow and their progeny steer and g.15532 C>A and g.17924 G>A SNP was genotyped using single-based extension. Employing GLM as a statistical model. g.15532 C>A and g.17924 G>A SNP have a significant effect in Hanwoo steer but no significant effect in Hanwoo cow. Combination of each of g.15532 C>A, g.17924 G>A SNP and beef quality grade of progeny have a significant effect on marbling score in Hanwoo cow. Therefore, we suggest that g.15532 C>A and g.17924 G>A SNP contribute to genetic improvement on marbling score in Hanwoo cow.

Enzymatic Synthesis of Low Trans Fats Using Rice Bran Oil, Palm Stearin and High Oleic Sunflower Seed Oil (미강유, 팜스테아린 및 고올레인산 해바라기씨유를 이용한 저트랜스 유지의 효소적 합성)

  • Kim, Ji-Young;Lee, Ki-Teak
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.38 no.4
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    • pp.470-478
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    • 2009
  • Low trans fats were synthesized by interesterification of rice bran oil (RBO), palm stearin (PS) and high oleic sunflower seed oil (HO) using TLIM from Thermomyces lanuginosa. After 24-h reaction, physicochemical characteristics such as fatty acid and triacylglycerol composition, solid fat content, melting point, tocopherol, oryzanol and phytosterol contents were evaluated. Trans fatty acid contents of the produced low-trans fats showed less than 0.5 wt%. Mostly, triacylglycerol species in the products were palmitoyl-linoleoyl-oleoyl-glycerol (PLO), palmitoyl-oleoyl-oleoyl-glycerol (POO) and palmitoyl-oleoyl-palmitoyl-glycerol (POP). Total tocopherol contents ranged from 6.94 to 11.83 mg/100 g while $0.18{\sim}0.49$ mg/100 g of $\gamma$-oryzanol and $182.47{\sim}269.08$ mg/100 g of phytosterols were observed depending on the substrates ratios. When the content of PS in the reaction substrate was increased, solid fat content and slip melting points were increased.

Synthesis of Functional Lipid from Glyceryl Monooleate and Conjugated Linoleic Acid by Enzymatic Reaction (Glyceryl Monooleate와 Conjugated Linoleic Acid로부터 효소적 반응을 이용한 기능성 유지 합성)

  • Jeon, Mi-Sun;Lee, Ki-Teak
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.38 no.8
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    • pp.1062-1068
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    • 2009
  • Diacylglycerol (DAG) were synthesized by enzymatic esterification of glyceryl monooleate (GMO) and conjugated linoleic acid (CLA) in a shaking water bath. The reaction was catalyzed by Lipozyme TLIM (immobilized lipase from Thermomyces lanuginosa). Effects of reaction time, molar ratio, enzyme road and molecular sieves were studied. Results of normal-phase high performance liquid chromatography (NP-HPLC) analysis were performed. At 1:1, 2:1 and 3:1 (GMO : CLA) molar ratio and Lipozyme TLIM of 20% amount, DAG were produced in 42.6, 54.4 and 54.6 area% in 1 hr, respectively. When different Lipozyme TLIM amounts (2, 5, 10, 20%) were used with 2:1 (GMO : CLA) molar ratio, DAG were produced 21.4 (24 hr), 51.7 (12 hr), 56.2 (6 hr) and 54.4 (1 hr) area%, respectively. The reaction in the absence of molecular sieves increased DAG contents. The maximum DAG concentration conditions were obtained with molar ratio of 2:1 (GMO : CLA), lipase concentration of 10% (of substrate), 10% molecular sieves and reaction time of 6 hours at 55$^{\circ}C$. Under this reaction condition, produced DAG-rich oil was composed of 69 area% DAG, 7.9 area% TAG, 2 area% FFA, and 21.1 area% MAG.

Synthesis of Diacylglycerol-Enriched Functional Lipid Containing DHA by Lipase-Catalyzed in Solvent-Free System (비 용매계에서 DHA가 함유된 Diacylglycerol의 효소적 반응에 의한 합성연구)

  • Kim, Nam-Sook;Lee, Ki-Teak
    • Korean Journal of Food Science and Technology
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    • v.37 no.4
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    • pp.584-589
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    • 2005
  • Structured triacylglycerol (SL-TAG) was synthesized by enzymatic interesterification with algae oil and soybean oil in solvent-free system. Structured di- and monoacylglycerol (SL-DAG/MAG) were produced by glycerolysis with SL-TAG and glycerol catalyzed by lipase. Reactions were performed by sn-1.3 specific Lipozyme RM IM lipase from Rhizomucor miehei (interesterification, 11%; glycerolysis 5% by weight of total substrates) in solvent-free system using stirred-batch type reactor. SL-DAG/MAG contained TAG (42,3 area%), 1,3-DAG (19.2 area%), 1,2-DAG (22.2 area%), MAG (16.0 area%), and free fatty acid (0.2 area%). Iodine and saponification values of SL-DAG/MAG were 208.8 and 179.6, respectively. SL-DAG/MAG appeared yellowish in color.

Lipolytic Effect of Supercritical Extraction from Pine Cone (Pinus koraiensis) in Mature 3T3-L1 Adipocytes (분화된 3T3-L1 세포에서 잣송이 초임계 추출물의 지방분해 효과)

  • Lee, Minhee;Nam, Da-Eun;Kim, Ok Kyung;Heo, Seok Hyun;Lee, Jeongmin
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.43 no.9
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    • pp.1342-1348
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    • 2014
  • Seeds of Korean pine cone (Pinus koraiensis) have long been consumed as an edible food in countries located in North-East Asia, On the other hand, Korean pine cone, containing various polyphenols, is discarded as a useless garbage after removing seeds. This study investigated the lipolytic effects of pine cone extract in differentiated 3T3-L1 adipocytes. Intracellular lipid accumulation was measured by Oil red O staining, free glycerol release by colorimetric reaction, and expression of genes related to lipid metabolism by real-time PCR. Compared to control, pine cone extract reduced intracellular lipid accumulation by 8.8% and increased free glycerol release by 8.2% a concentration of $5{\mu}g/mL$ in differentiated 3T3-L1 adipocytes. mRNA levels of fatty acid synthesis were not significantly different between control and pine cone extract, but mRNA levels of lipoprotein lipase (LPL) and hormone-sensitive lipase (HSL) significantly increased by 38.7% and 94.1% at a concentration of $5{\mu}g/mL$, respectively. Thus, pine cone extract is suggested to have lipolytic effects through induction of LPL and HSL gene expression.

Characterization of Low-Trans Solid Fat from Canola and Fully Hydrogenated Soybean Oil by Lipase-Catalyzed Interesterification Reaction (효소적 에스테르 교환 반응 시 카놀라유와 대두극도경화유의 비율에 따른 저트랜스 고체지방의 특성)

  • Kim, Young-Joo;Lyu, Hyun-Kyeong;Lee, Seon-Mo;Lee, Ki-Teak
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.39 no.9
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    • pp.1320-1327
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    • 2010
  • Lipase-catalyzed interesterification of canola (CO) and fully hydrogenated soybean oil (FHSBO) at different weight ratios (70:30, 75:25, and 80:20) was performed in a batch type reactor to produce low-trans solid fats. Each reaction was conducted in the shaking water bath for various reaction times (1, 3, 6, 18 and 24 hr) at 70oC and 220 rpm using Lipozyme TLIM (20 wt% of total substrate) from Thermomyces lanuginosus. After 24 hr reaction, solid fat content (SFC) by differential scanning calorimetry (DSC), fatty acid and triacylglycerol (TAG) composition of low-trans solid fats were determined. SFC of the products was reduced when the content of canola oil in the reaction mixture was increased. Major fatty acids were stearic acid (C18:0), oleic acid (C18:1) and linoleic acid (C18:2). Trans fatty acid content in the low-trans solid fats showed less than 0.3 wt%. In the HPLC analysis, major TAG species showed LOO (linoleyl-oleoyl-oleoyl), OOO, POO/SOL, SOO, and SOS.

Optimization of Enzymatic Synthesis Condition of Structured Lipids by Response Surface Methodology (반응표면분석에 의한 기능성 유지의 효소적 합성 조건 최적화)

  • Cho, Eun-Jin;Lee, Jong-Ho;Lee, Ki-Teak
    • Korean Journal of Food Science and Technology
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    • v.36 no.4
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    • pp.531-536
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    • 2004
  • Synthesis conditions were optimized using response surface methodology for producing structured lipids (SL) by interesterification of DHA-enriched algae oil derived from microalgae, Schizochytrium sp. and corn oil. Reaction was performed fer 24 hr at $55^{\circ}C$ catalyzed by immobilized lipase from Rhizomucor miehei (RM IM) in shaking water bath. Major fatty acids of SL were palmitic (21.70 mol%), oleic (20.20 mol%), and linoleic (27.34 mol%) acids, and DHA (15.06 mol%). To separate newly synthesized SL-triglycerides (TG) species, HPLC with evaporative light scatting detector (ELSD) was used. Production conditions were optimized using central composite design with reaction temperature $(35-75^{\circ}C,\;X_1)$, reaction time $(2-42\;hr,\;X_2)$, and enzyme concentration $(2-14%,\;X_3)$ as variables. When variables were $70.28^{\circ}C\;(X_1),\;28.74\;hr\;(X_2),\;and\;11.30%\;(X_3)$, maximum content of selected three peaks of synthesized SL-TG species was predicted as 6.97 area%.

초임계유체를 이용한 당 에스테르의 합성 및 분리정제

  • Seo, Deok-Gi;Kim, U-Gyeong;Kim, Gwang-Il;Yu, In-Sang;Yun, Hyeon-Hui
    • 한국생물공학회:학술대회논문집
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    • 2001.11a
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    • pp.705-708
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    • 2001
  • Enzymatic synthesis and purification of sugar esters using supercritical $CO_2$ were investigated. The observed yield of suagr ester produced by transesterification of methyl glucoside and oleic acid using a lipase(Novozym 435) was 67% at 24 hours of reaction in the supercritical $CO_2$. The solubility of the fatty acids in the supercritical $CO_2$ was measured to find the conditions of supercritical separation of the fatty acids from the reaction mixture. The solubility of capric and oleic acid was 5 ${\times}$ $10^{-4}$, 1.7 ${\times}$ $10^{-4}$ mol/mol $CO_2$, respectively, varying at $35{\sim}50^{\circ}C$ and 80${\sim}$120 atm.

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Lipolytic enzyme을 생성하는 해양성 세균 Psehdoalteromonas sp.의 분리와 특성

  • 김영미;이원재
    • Proceedings of the Korean Society of Fisheries Technology Conference
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    • 2003.05a
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    • pp.168-169
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    • 2003
  • Lipase(E.C. 3.1.1.3)는 triglyceride의 ester 결합을 가수분해하여 glycerol과 지방산을 생성하거나 기질에 특이적으로 계합성하는 효소로, lipase의 생산 및 용도의 개발에 관한 많은 연구가 진행되어져 왔다(Macrae et al., 1985). 미생물 유래의 lipase는 기존의 화학적인 처리에 의한 생산물을 얻을 때 생기는 여러 부산물에 대한 문제를 해결할 수 있고, 일단 순수한 형태로 분리된 균주는 배양조건이 수립되면 원하는 시간에 필요한 양의 균체를 유용물질의 원료로 공급하여 생산 작업의 규모도 필요에 의해 증대할 수 있다. (중략)

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