生物技术通报 ›› 2013, Vol. 0 ›› Issue (3): 192-198.

• 研究报告 • 上一篇    

条斑紫菜高纯度藻红蛋白规模制备及光学性质研究

郭子叶1,蔡春尔1,2,李春霞1,耿中雷1,贾睿1,2,何培民1,2   

  1. 1. 上海海洋大学水产与生命学院,上海 201306 ;2. 上海海洋大学海洋科学研究院,上海 201306
  • 收稿日期:2012-09-23 修回日期:2013-03-21 出版日期:2013-03-20 发布日期:2013-03-21
  • 作者简介:郭子叶,女,硕士研究生,研究方向:海藻生物活性物质;E-mail :luckyguoziye@gmail.com
  • 基金资助:
    国家科技支撑计划课题(2012BAC07B03),上海市教委重点学科项目(S30701)

Pilot Preparation and Optical Properties of Highly Purified Phycoerythrin from Porphyra yezoensis

Guo Ziye1, Cai Chuner1, 2, Li Chunxia1, Geng Zhonglei1, Jia Rui1, 2, He Peimin1, 2   

  1. 1. College of Fisheries and Life Science,Shanghai Ocean University,Shanghai 201306 ;2. Institute of Marine Science,Shanghai Ocean University,Shanghai 201306)
  • Received:2012-09-23 Revised:2013-03-21 Published:2013-03-20 Online:2013-03-21

摘要: 旨在大量制备条斑紫菜高纯度藻红蛋白并研究其光学性质。以江苏吕泗条斑紫菜为原料,采用“溶胀+ 组织捣碎” 法破碎2 kg 冻干条斑紫菜叶状体细胞,经多次硫酸铵盐析和一次羟基磷灰石层析后获得纯度> 3.20 的藻红蛋白的产率为0.184%, 再经一次同样层析可获得纯度> 4.50 的藻红蛋白的产率为0.109%。蛋白纯度已通过吸收/ 荧光激发光谱,十二烷基硫酸钠- 聚丙 烯酰胺凝胶电泳(SDS-PAGE)/ 非变性聚丙烯酰胺凝胶电泳(Native-PAGE)的考马斯亮蓝/ 醋酸锌双染验证。该蛋白摩尔消光系 数经Folin-酚法和Bradford 法测定分别为1.79 mL/(mg?cm)和1.73 mL/(mg?cm),20℃时在505 nm 处的荧光量子产率为0.90, 在日光灯、发光二极管、碘钨灯和激光4 种光源下的光漂白效果以激光最显著,240 μg/mL 藻红蛋白10 min 可接近碘钨灯辐照240 min 的光漂白率。

关键词: 条斑紫菜, 藻红蛋白, 纯化, 摩尔消光系数, 荧光量子产率, 光漂白

Abstract: Pilot preparation were tried to obtain highly purified phycoerythrin(PE)in abundance from P. yezoensis in Lvsi city, Jiangsu Province and to study its optical properties. 2 kg freeze-dried P. yezoensis thallus was broken using “swelling & smash” method. Further purification was performed by means of ammonium sulphate co-precipitation(ASCP)and hydroxyapatite(HA)column chromatogram and the purity of PE achieved 1.67(A565/A280), corresponding to yield of 0.184%, The purity of PE could be improved beyond 4.5 with a yield of 0.109% if HAP chromatography repeated. PE was validated by absorption/fluorescence spectra and SDS-PAGE/Native-PAGE stained with coomassie brilliant blue/zinc acetate for its purity. Molar extinction coefficient(MEC)of PE were 1.79mL/(mg?cm)and 1.73 mL/(mg?cm) determined by folin-phenol method and Bradford method, respectively. Fluorescence quantum yield of PE was 0.90 at 505 nm wavelength at 20℃ . The PE effect of photo bleaching was the most significant under irradiating of laser among daylight lamp, light emitting diode(LED), iodine-tungsten lamp and laser. For example, the photo bleaching rate of 240 μg/mL PE after 10 minutes’ irradiating under laser was close to the value using iodine-tungsten lamp of 240 minutes’ irradiating.

Key words: Porphyra yezoensis, Phycoerythrin, Purification, Molar extinction coefficient, Fluorescence quantum yield,Photobleaching