Journal of Life Science (생명과학회지)

Korean Society of Life Science (한국생명과학회)
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Isolation and Characterization of Complement System Activating Polysaccharides from the Hot Water Extract of the Leaves of Capsicum annuum L.

고추잎 열수추출물로부터 보체계 활성화 다당의 분리 및 특성

  • 이용세 (대구대학교 자연자원대학 생명자원학부) ;
  • 나경수 (대구공업대학 식품영양과) ;
  • 정상철 (대구대학교 생물공학과) ;
  • 서형주 (고려대학교 보건대학 식품영양과) ;
  • 박희성 (대구가톨릭대학교 생명자원학부) ;
  • 백형석 (부산대학교 미생물학과) ;
  • 최장원 (대구대학교 자연자원대학 생명자원학부)
  • Published : 2002.02.01
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Abstract

It was observed that the hot water extract of the leaves of Capsicum annuum L., a Korean edible plant, had a potent anti-complementary activity. Crude polysaccharide fraction(CAL-0) was obtained by methanol reflux, ethanol precipitation, dialysis and lyophilization. CAL-0 contained 51.8% of total sugar, 8.2% of uronic acid and 16.8% of protein, and consisted of mainly arabinose, galactose and glucose as neutral sugars and galacturonic acid as uronic acid. The anti-complementary activity of CAL-0 decreased greatly by periodate oxidation, but was not changed by pronase treatment. Also, the anti-complementary activity of CAL-0 was reduced partially in the absence of the $Ca^{2+}$ ion. The crude polysaccharide CAL-0 was found to activate the C3 component both in the presence and in the absence of $Ca^{2+}$ through the crossed-immunoelectrophoresis suggesting that those involved in both classical and alternative complement pathway CAL-0 was further separated to an unabsorbed fraction(CAL-1) and six absorbed fractions(CAL-2longrightarrowCAL-7) on DEAE Sepharose CL-6B ion exchange column. Among them four major fractions in activity and yield were obtained, and consisted mainly of arabinose, galactose and glucose with various molar ratios. The major fraction, CAL-2, was purified to give a high molecular fraction(CAL-2-I) and a low molecular fraction(CAL-2-II) on Sepharose CL-6B column. The anti-complementary activity of CAL-2-I, a molecular weight of about 61,000, was higher than it of CAL-2-II.-II.

고추잎의 열수추출을 행하여 추출물의 보체계 활성을 측정한 결과 열수추출물에서 높은 항보체 활성이 나타나 고추잎의 열수추출물을 대상으로 활성 다당을 분리하여 특성을 조사하였다. 즉 열수추출물의 메탄을 환류, 에탄을 침전, 투석 및 동결건조를 통하여 고추일 600 g으로부터 186g의 조다당(CAL-0)을 얻었다. CAL-0는 당 51.8%, 산성당 8.2%, 단백질 16.8%를 함유하고 있었으며 주로 arabinose, glucose, galactose로 구성되어 있었다. 조다당 CAL-0는 pronase 처리에서 활성의 변화가 없었으나 과요오드산 산화에 의해서 급격히 활성이 감소하였다. 또한 CAL-0의 항보체 활성은 $Ca^{2+}$이온 존재 유무시의 항보체 활성과 교차면역 전기영동 결과 고전경로와 부경로를 통하여 보체계를 활성화하는 것이 관찰되었다. 이 조다당 CAL-0를 DEAE Sepharose CL-6B을 사용하여 0$\longrightarrow$1 M NaCl로 이온교환 크로마토그래피를 행하여 1개의 비흡착획분과 6개의 흡착획분을 얻었다. 이중 증류수(CAL-1)와 0.1 M NaCl에서 용출된 획분(CAL-2)이 다른 획분에 비해 높은 보체계 활성을 보였으며 활성 획 분들에서는 주로 arabinose, galactose, glucose가 다양한 비율의 몰비로 구성되어 있었다. CAL-2 획분은 Sepharose CL-6B의 gel filtration에서 고분자 peak와 저분자 peak로 분리되었으며 항보체 활성은 분자량 61,000 정도의 고분자 획분에서 높게 나타났다.

Keywords

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