한국초지조사료학회지 (Journal of The Korean Society of Grassland and Forage Science)

  • 제25권4호
  • /
  • Pages.287-296
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  • 2005
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  • 2287-5824(pISSN)
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  • 2287-5832(eISSN)
한국초지조사료학회 (The Korean Society of Grassland and Forage Science)
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벼의 잎 조직에서 발현되는 저온 스트레스 관련 단백질의 분리 동정

Identification of Cold Stress-related Proteins in Rice Leaf Tissue

  • 이동기 (경상대학교 응용생명과학부) ;
  • 이상훈 (경상대학교 응용생명과학부) ;
  • 이병현 (경상대학교 응용생명과학부)
  • Lee Dong-Gi (Division of Applied Life Science, Gyeongsang National University) ;
  • Lee Sang-Hoon (Division of Applied Life Science, Gyeongsang National University) ;
  • Lee Byung-Hyun (Division of Applied Life Science, Gyeongsang National University)
  • 발행 : 2005.12.01
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초록

프로테오믹스 기법을 이용하여 벼 저온 스트레스 관련 단백질을 분리 동정하기 위하여 저온 처리한 벼로부터 단백질을 분리하였다. 분리한 단백질로부터 Rubisco 단백질을 제거하기 위해 $15\%$ PEG fractionation을 실시한 후 $15\%$ PEG 상등액과 pellet 분획을 각각 이차원전기 영동으로 단백질을 분석하였고, MALDI-TOF MS를 이용하여 단백질을 동정하였다. $15\%$ PEG 상등액에서 8개의 단백질 spot이 증가하였고 10개의 spot 이 감소하였다. 증가한 8개 단백질 spot 중에서 epimerase/dehydratase, fructokinase, ribose-5-phosphate isomerase (Rpi), chaperonin 21 precursor, photosystem II oxygen-envolving complex (PS II OEC) protien 2 precursor, thioredoxin h-type (Trx-h) 등 6개의 단백질이 확인되어졌다. $15\%$ PEG pellet 분획에서 13개의 단백질 spot이 증가하였고 14 spot이 감소하였으며, 증가한 13개 단백질 spot중에서 OSJNB b059K02.15, hypothetical protein, mitogen-activated protein kinase kinase (MAPKK), 20S proteasome beta 7 subunit, Rubisco small subunit 등 5개의 단백질이 확인되어졌다. 확인되어진 단백질들은 기능별로 분류해 본 결과, 세포대사관련 단백질, energy 생성에 관련된 단백질, 산화환원 조절관련 단백질, 식물 병 방어관련, 단백질 합성 및 신호전달 관련 단백질 등으로 분류되었다. 이들 중 RPi와 MAPKK가 저온 스트레스에 의해 발현되는 것이 본 실험의 프로테옴 분석을 통하여 최초로 동정되었다.

To investigation protein expression pattern in rice leaves exposed to cold stress, the soluble proteins extracted from leaf tissue were fractionated with $15\%$ PEG and separated by two-dimensional polyacrylamide gel electrophoresis (2-DE). Differentially expressed proteins were identified by peptide mass fingerprinting using matrix assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS). Eight proteins up-regulated and 10 down-regulated were found in $15\%$ PEG supernatant fraction. In addition, 13 proteins up-regulated and 14 down-regulated were found in $15\%$ PEG pellet fraction. It was identified the differentially expressed proteins in $15\%$ PEG supernatant fraction as pimerase/dehydratase fructokinase, ribose-5-phosphate isomerase (Rpi), chaperonin 21 precursor, probable photosystem II oxygen-envolving complex (PS II OEC) protein 2 precursor and thioredoxin h-type (Trx-h) and those in $15\%$ PEG pellet fraction as OSINBb0059K02.15, hypothetical protein, putative mitogen-activated protein kinase kinase (MAPKK), beta 7 subunit of 205 proteasome, ribulose-1, 5-bisphosphate carboxylase/oxygenase (Rubisco) small subunit. These proteins are involved in metabolism, energy, protein synthesis, disease/defense and signal transduction-related proteins.

키워드

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