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 Purification of R-phycoerythrin from a marine macroalga Gracilaria gracilis by anion-exchange chromatography
Tác giả hoặc Nhóm tác giả:  Huu Phuoc Trang Nguyen, Michèle Morançais, Paul Déléris, Joël Fleurence, Chau Thanh Nguyen-Le, Khanh Ha Vo & Justine Dumay
Nơi đăng: Journal of Applied Phycology; Số: 32;Từ->đến trang: 553–561;Năm: 2020
Lĩnh vực: Kỹ thuật; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
Gracilaria gracilis, a red macroalga, represents an exploited important biomass. One of the potential uses of this red seaweed is the production of valuable molecules such as R phycoerythrin. This compound has recently found applications in food and cosmetic industries as a natural colorant, in conducting medical diagnosis and in biology. However, after R phycoerythrin extraction the protein extract has to be concentrated and pre-purified, which is commonly expensive and requires many steps. In this paper, R-phycoerythrin from the crude extract obtained by phosphate buffer 20 mM, pH 7.1, was purified by one-step chromatographic method. Native R-phycoerythrin was achieved with a high purity index (A565/A280 ratio) of 3.25 (3.2 = standard R-phycoerythrin purity) after purification on DEAE Sepharose fast flow chromatography with the obtained fraction at 200 mM NaCl. This fraction presented the absorption and emission spectra of R-phycoerythrin with major absorbance at 498, 540, and 565 nm. Native form of this molecule was presented about 260 kDa. Besides, the purified pigment R phycoerythrin included four subunits: α subunit (18 kDa), β subunit (21 kDa), γ subunit (29 kDa), and γ’ subunit (27 kDa) by gel electrophoresis.
ABSTRACT
Gracilaria gracilis, a red macroalga, represents an exploited important biomass. One of the potential uses of this red seaweed is the production of valuable molecules such as R phycoerythrin. This compound has recently found applications in food and cosmetic industries as a natural colorant, in conducting medical diagnosis and in biology. However, after R phycoerythrin extraction the protein extract has to be concentrated and pre-purified, which is commonly expensive and requires many steps. In this paper, R-phycoerythrin from the crude extract obtained by phosphate buffer 20 mM, pH 7.1, was purified by one-step chromatographic method. Native R-phycoerythrin was achieved with a high purity index (A565/A280 ratio) of 3.25 (3.2 = standard R-phycoerythrin purity) after purification on DEAE Sepharose fast flow chromatography with the obtained fraction at 200 mM NaCl. This fraction presented the absorption and emission spectra of R-phycoerythrin with major absorbance at 498, 540, and 565 nm. Native form of this molecule was presented about 260 kDa. Besides, the purified pigment R phycoerythrin included four subunits: α subunit (18 kDa), β subunit (21 kDa), γ subunit (29 kDa), and γ’ subunit (27 kDa) by gel electrophoresis.
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