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Streptomyces violaceoruber 유래 Alginate Lyase의 정제 및 Sodium Alginate 가수분해 올리고당의 중합도별 Bifidobacterium spp.과 Lactobacillus spp.에 대한 생육활성 KCI 등재

Purification of Alginate Lyase from Streptomyces violaceoruber and the Growth Activity of Intestinal Bacteria by Degree of Polymerization of Alginate Hydrolysates

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산업식품공학 (Food Engineering Progress)
한국산업식품공학회 (Korean Society for Food Engineering)
초록

Alginate lyase from Streptomyces violaceoruber was purified by DEAE sephacel chromatography and SP sepharose chromatography. The specific activity of the purified enzyme was 14.6 units/mg protein, representing a 40.6-fold purification of the crude extract. The final preparation thus obtained showed a single band on Tricine-SDS polyacrylamide gel electrophoresis whose molecular weight was determined to be 23.3 kDa. The polyMG block of sodium alginate was hydrolyzed by the purified alginate lyase and then separated by activated carbon column chromatography and bio gel P-2 gel filtration. The main hydrolysates were composed of hetero type M/G-oligosaccharides with the degrees of polymerization (D.P.) being 6 and 8. To investigate the effects of hetero type M/Goligosaccharides from the sodium alginate on the growth of some intestinal bacteria, cells were cultivated individually on the modified-MRS medium containing D.P. 6 and 8 M/G-oligosaccharides. B. longumgrew 4.25-fold and 6.44-fold more effectively by the treatment of D.P. 6 and 8 M/G-oligosaccharides compared with those of standard MRS medium. In addition, B. bifidumgrew 3.3-fold and 5.4-fold more effectively by the treatment of D.P. 6 and 8 M/G-oligosaccharides. In conclusion, D.P. 8 was more effective than D.P. 6 hetero M/G-oligosaccharides as regards the growth of Bifidobacteriumspp. and Lactobacillus spp. Key words: hetero M/G-oligosaccharides, Streptomyces violaceoruber

저자
  • 윤민(가천대학교 바이오나노대학 식품생물공학과) | Min Yoon
  • 박영서(가천대학교 바이오나노대학 식품생물공학과) | Young-Seo Park
  • 박귀근(가천대학교 바이오나노대학 식품생물공학과) | Gwi-Gun Park