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고추잎 열수추출물로부터 보체계 활성화 다당의 분리 및 특성

Isolation and Characterization of Complement System Activating Polysaccharides from the Hot Water Extract of the Leaves of Capsicum annuum L.

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

초록

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.

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.

키워드

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