Purification and characterization of agarases from a marine bacterium Vibrio sp. F-6

doi:10.1007/s10295-008-0365-2

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	Purification and characterization of agarases from a marine bacterium Vibrio sp. F-6
	Fu, Wandong 1,2,3; Han, Baoqin 1; Duan, Delin 3; Liu, Wanshun 1; Wang, Changhong 1
刊名	JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY
	2008-08-01
卷号	35 期号:8 页码:915-922
关键词	Purification Characterization Agarase Neoagarooligosaccharide Vibrio Sp
ISSN号	1367-5435
DOI	10.1007/s10295-008-0365-2
文献子类	Article
英文摘要	Marine bacterium Vibrio sp. F-6, utilizing agarose as a carbon source to produce agarases, was isolated from seawater samples taken from Qingdao, China. Two agarases (AG-a and AG-b) were purified to a homogeneity from the cultural supernatant of Vibrio sp. F-6 through ammonium sulfate precipitation, Q-Sepharose FF chromatography, and Sephacryl S-100 gel filtration. Molecular weights of agarases were estimated to be 54.0 kDa (AG-a) and 34.5 kDa (AG-b) by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The optimum pH values for AG-a and AG-b were about 7.0 and 9.0, respectively. AG-a was stable in the pH range of 4.0-9.0 and AG-b was stable in the pH range of 4.0-10.0. The optimum temperatures of AG-a and AG-b were 40 and 55 degrees C, respectively. AG-a was stable at temperature below 50 degrees C. AG-b was stable at temperature below 60 degrees C. Zn(2+), Mg(2+) or Ca(2+) increased AG-a activity, while Mn(2+), Cu(2+) or Ca(2+) increased AG-b activity. However, Ag(+), Hg(2+), Fe(3+), EDTA and SDS inhibited AG-a and AG-b activities. The main hydrolysates of agarose by AG-a were neoagarotetraose and neoagarohexaose. The main hydrolysates of agarose by AG-b were neoagarooctaose and neoagarohexaose. When the mixture of AG-a and AG-b were used, agarose was mainly degraded into neoagarobiose.; Marine bacterium Vibrio sp. F-6, utilizing agarose as a carbon source to produce agarases, was isolated from seawater samples taken from Qingdao, China. Two agarases (AG-a and AG-b) were purified to a homogeneity from the cultural supernatant of Vibrio sp. F-6 through ammonium sulfate precipitation, Q-Sepharose FF chromatography, and Sephacryl S-100 gel filtration. Molecular weights of agarases were estimated to be 54.0 kDa (AG-a) and 34.5 kDa (AG-b) by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE). The optimum pH values for AG-a and AG-b were about 7.0 and 9.0, respectively. AG-a was stable in the pH range of 4.0-9.0 and AG-b was stable in the pH range of 4.0-10.0. The optimum temperatures of AG-a and AG-b were 40 and 55 degrees C, respectively. AG-a was stable at temperature below 50 degrees C. AG-b was stable at temperature below 60 degrees C. Zn2+, Mg2+ or Ca2+ increased AG-a activity, while Mn2+, Cu2+ or Ca2+ increased AG-b activity. However, Ag+, Hg2+, Fe3+, EDTA and SDS inhibited AG-a and AG-b activities. The main hydrolysates of agarose by AG-a were neoagarotetraose and neoagarohexaose. The main hydrolysates of agarose by AG-b were neoagarooctaose and neoagarohexaose. When the mixture of AG-a and AG-b were used, agarose was mainly degraded into neoagarobiose.
学科主题	Biotechnology & Applied Microbiology
URL标识	查看原文
语种	英语
WOS记录号	WOS:000257945700015
公开日期	2010-12-24
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/5547]
专题	海洋研究所_实验海洋生物学重点实验室
作者单位	1.Ocean Univ China, Coll Marine Life Sci, Qingdao 266003, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Fu, Wandong,Han, Baoqin,Duan, Delin,et al. Purification and characterization of agarases from a marine bacterium Vibrio sp. F-6[J]. JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY,2008,35(8):915-922.
APA	Fu, Wandong,Han, Baoqin,Duan, Delin,Liu, Wanshun,&Wang, Changhong.(2008).Purification and characterization of agarases from a marine bacterium Vibrio sp. F-6.JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY,35(8),915-922.
MLA	Fu, Wandong,et al."Purification and characterization of agarases from a marine bacterium Vibrio sp. F-6".JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY 35.8(2008):915-922.