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NTIS 바로가기Journal of plant biotechnology = 식물생명공학회지, v.38 no.4, 2011년, pp.241 - 250
이경렬 (국립농업과학원 농업생명자원부) , 최윤정 (국립농업과학원 농업생명자원부) , 김순희 (국립농업과학원 농업생명자원부) , 노경희 (국립농업과학원 농업생명자원부) , 김종범 (국립농업과학원 농업생명자원부) , 김현욱 (국립농업과학원 농업생명자원부)
The most part of vegetable oils is accumulated as storage lipid, triacylglycerol (TAG) in seed and used as energy source when seed is germinated. It is also used as essential fatty acids and energy source for human and animal. Recently, vegetable oils have been more and more an important resource be...
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핵심어 | 질문 | 논문에서 추출한 답변 |
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일반적으로 식물의 종자유와 세포막 지질을 구성하는 지방산의 종류는 무엇인가? | org/corp/ statistics/en/). 일반적으로 식물의 종자유와 세포막 지질을 구성하는 지방산은 팔미트산 (Palmitic acid, 16:0), 스테아르산 (Stearic acid, 18:0), 올레산 (Oleic acid, 18:1), 리놀레산(Linoleic acid, 18:2), 알파리놀렌산 (α-Linolenic acid, 18:3)의 5가지이다. 세포막과 엽록체막의 지방산의 구성은 지질의 종류가 다르듯이 약간 다른데 엽록체막의 당지질에는 16:1, 16:2, 16:3 등의 불포화지방산도 포함하고 있다. | |
식물에서 지방산 생합성은 어디에서 시작되나요? | 식물에서 지방산 생합성은 색소체 (plastid)에서 시작되고 적당한 크기가 되면 소포체로 이동하여 막지질 또는 저장지질의 구성성분이 된다. 좀 더 자세히 살펴보자면, 색소체에서 acetyl-CoA가 acetyl-CoA carboxylase (ACCase)에 의해 malonyl-CoA가 되고 ACP와 결합하여 malonylACP가 되고 계속적으로 malonyl-CoA에서 탄소 2개를 계속 전달받아 16:0-ACP로 길어지고 16:0-ACP는 16:0-ACP elongase에 의해 18:0-ACP가 되고 이것은 다시 18:0-ACP Δ9-desaturase에 의해 18:1-ACP가 된다. | |
식물의 지방산 생합성과 triacylglycerol 형태로 종자 축적에 관여하는 유전자를 분류하면 어떤 것이 있나요? | 본 총설에서는 지질함량에 영향을 미치는 것으로 여겨지는 후보 유전자들에 대해 기술하고 이들의 지방 함량 증대 가능성을 조사하였다. 식물의 지방산의 생합성과 종자유의 축적에 관여하는 유전자들은 크게 구분하자면 첫째, TAG가 생합성되기 위해 필요한 전구체를 합성하는 유전자, 둘째, 지방산합성과 TAG 축적에 관여하는 유전자, 셋째, 종자 발달과 종자유 축적에 관여하는 전사인자 유전자가 있다. 종자유 함량을 결정하는 대사들은 앞에서 언급했듯이 매우 복잡하기 때문에 최근에 전사인자의 조절이 다수의 지방생산 대사 유전자를 동시 조작하여 형질전환 식물에서 종자유 함량이 증진하는 것보다 더 바람직한 접근법으로 여겨지고 있다. |
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