KSBB Journal

The Korean Society for Biotechnology and Bioengineering (한국생물공학회)
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Biochemical Properties of Seed Lectin from Korean Soybean Cultivars Developed for Soy Source

한국산 장류콩 종자 렉틴의 생화학적 특성

  • Published : 2009.04.29
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Abstract

Lectin was finally isolated on Sephadex G-100 from Korean soybean cultivars developed for soy source and investigated its some biochemical properties. Native PAGE pattern of this lectin revealed a molecular weight of 108 kDa as tetramer. The molecular weight of this lectin isolated as double protein band by SDS-PAGE was calculated to be 32 and 22 kDa from the relative mobilities compared with those of the standard proteins. Among the tested red blood cell, the isolated lectin agglutinated rabbit red blood cell treated with trypsin, but did not agglutinated human red blood cells (A, B, AB, O), rat, and untreated rabbit red blood cell. The optimal temperature and thermal stability of isolated lectin was at 20-$50^{\circ}C$ and 10-$60^{\circ}C$, respectively. This lectin was stable at 7.2, and showed complete loss in its activity below pH 6.2 and above pH 8.0.

한국산 장류콩 종자로부터 최종적으로 Sephadex G-100상에서 분리한 lectin의 분자량, 적혈구 응집력, 온도, 열 안정성, 및 pH의 생화학적 특성을 조사하였다. 분리된 lectin을 SDS-PAGE한 결과, 분자량이 32 kDa와 22 kDa인 2개의 band가 나타났으며, Native PAGE에 의해서 108 kDa의 tetramer임을 알 수 있었다. Lectin은 trypsin을 처리한 사람의 A, B, AB, O 혈액과 쥐 혈액에서 혈구응집 반응이 일어나지 않았으나 토끼에서는 응집 반응이 일어났으며, trypsin을 처리하지 않은 모든 혈액에서는 응집반응이 일어나지 않았다. 이 lectin은 최적온도가 20-$50^{\circ}C$이며, 10-$60^{\circ}C$ 에서 열 안정성을 보였다. 최적 pH는 7.2로서 6.2 이하와 8.0 이상에서는 활성이 상설되었다.

Keywords

References

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