‘홍로’ 사과 과피 및 과육의 단백질체 비교 분석

국문 초록 (Abstract)

국내 육종 사과 품종인 ‘홍로’의 과피와 과육에서 발현되는 단백질체를 추출하여 이차원 전기영동으로 분리하였다. 그 결과 대부분의 단백질들은 과피와 과육에서 유사한 정도로 발현되었으나, 30개의 단백질 spot들은 과피 또는 과육에서의 발현 정도가 2배 이상 차이가 났다. 이들 중 25개는 과피에서, 5개는 과육에서 더 높게 발현되었다. 이들 단백질들을 MALDI-TOF/TOF로 분석한 결과, 과피에서 더 높게 발현된 단백질 spot들 중 18개는 각각의 기능을 갖는 단백질로 동정 되었고, 나머지 7개는 기능이 밝혀지지 않은 것으로 동정되었거나 미동정 되었다. 과육에서 더 높게 발현된 단백질 spot들의 경우 2개는 각각의 기능을 갖는 단백질로 동정 되었고, 나머지 3개는 미동정 되었다. 과피에서 더 높게 발현된 단백질은 에틸렌의 생합성과 관련된 1-aminocyclopropane-1-carboxylate oxidase homolog(spot 21번), 이차대사산물의 생합성과 관련된 acetyl-CoA acetyltransferase, cytosolic 1(spot 148), acetyl-CoA acetyltransferase, cytosolic 1-like(spot 316) 및 8-hydroxygeraniol dehydrogenase-like(spot 348), 광합성과 관련된 oxygen-evolving enhancer protein 1, chloroplastic(spot 210) 및 ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit(spot 273), 생체방어 및 스트레스 반응과 관련된 (+)-neomenthol dehydrogenase-like(spot 216 및 219), formate dehydrogenase, mitochondrial(spot 305), glutathione S-transferase-like(spot 483 및 484) 및 acidic endochitinase SE 2-like, partial(spot 391 및 392), 항산화효소인 L-ascorbate peroxidase 2(spot 221), 알레르기 관련 단백질인 MLP-like protein 34(spot 406), major allergen Mal d 1(spot 451 및 452) 및 major allergen Mal d 1.06A01(spot 457)이었다. 한편 과육에서 더 높게 발현된 단백질은 protein folding과 관련된 chaperonin 60 subunit alpha 1, chloroplastic(spot 8) 및 탄수화물 대사와 관련된 NADP-dependent D-sorbitol-6-phosphate dehydrogenase(spot 380)이었다. 이상의 연구 결과들은 사과의 육종, 저장, 품질, 환경에 대한 내성 등과 관련된 광범위한 연구에 유용하게 이용될 수 있을 것으로 사료되었다.

다국어 초록 (Multilingual Abstract)

The proteome expressed in the peel and flesh of ‘Hongro’, a domestic breeding apple cultivar, was extracted and separated by two-dimensional electrophoresis. Most of the proteins were expressed at similar levels in the peel and flesh, but 30 protein spots showed a difference of more than two times higher in expression level in the peel and flesh. Of these, 25 were higher in the peel and 5 were higher in the flesh. By analyzing these proteins with MALDI-TOF/TOF, 18 of the protein spots that were higher in the peel were identified as proteins with their respective functions, and the remaining 7 were identified as having unknown function or were unidentified. In the case of the protein spots expressed higher in the flesh, two were identified as proteins having respective functions, and the other three were unidentified. Proteins more highly expressed in the peel were 1-aminocyclopropane-1-carboxylate oxidase homolog (spot 21) related to the biosynthesis of ethylene; acetyl-CoA acetyltransferase (spot 148), cytosolic 1, acetyl-CoA acetyltransferase, cytosolic 1-like (spot 316) and 8-hydroxygeraniol dehydrogenase-like (spot 348) related to the biosynthesis of secondary metabolites; oxygen-evolving enhancer protein 1, chloroplastic (spot 210), and ribulose-1, 5-bisphosphate carboxylase/oxygenase large subunit (spot 273) related to the photosynthesis;(+)-neomenthol dehydrogenase-like (spot 216 and 219), formate dehydrogenase, mitochondrial (spot 305), glutathione S-transferase-like (spot 483 and 484), and acidic endochitinase SE 2-like, partial (spot 391 and 392) related to the biological defense and stress response; and antioxidant enzyme L-ascorbate peroxidase 2 (spot 221), MLP-like protein 34 (spot 406), major allergen Mal d 1 (spot 451 and 452), and major allergen Mal d 1.06A01 (spot 457) related to allergies. On the other hand, proteins that were more highly expressed in the flesh were chaperonin 60 subunit alpha 1, chloroplastic (spot 8) related to protein folding, and NADP-dependent D-sorbitol-6-phosphate dehydrogenase (spot 380) related to carbohydrate metabolism. These results will be useful in a wide range of studies related to apple breeding, storage, quality, and environmental tolerance.

목차 (Table of Contents)

• Abstract
• 서언
• 재료 및 방법
• 결과 및 고찰
• 초록
• Literature Cited

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