Expression of beta-carotene hydroxylase gene (crtR-B) from the green alga Haematococcus pluvialis in chloroplasts of Chlamydomonas reinhardtii
Data(s) |
01/08/2007
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Resumo |
A carotenoid gene (crtR-B) from the green alga Haematococcus pluvialis, encoding beta-carotene hydroxylase that was able to catalyze the conversion of beta-carotene to zeaxanthin and canthaxanthin to astaxanthin, was cloned into Chlamydomonas reinhardtii chloroplast expression vector p64D to yield plasmid p64DcrtR-B. The vector p64DcrtR-B was transferred to the chloroplast genome of C. reinhardtii using micro-particle bombardment. PCR and Southern blot analyses indicated that crtR-B was integrated into the chloroplast genome of the transformants. RTPCR assays showed that the H. pluvialis crt R-B gene was expressed in C. reinhardtii transformants. The transformants rapidly synthesized carotenoids in larger quantities than the wild-type upon being transferred from moderate to high-intensity white light. This research provides a foundation for further study to elucidate the possible mechanism of photo-protection by xanthophylls and other carotenoids in high light conditions or through exposure to UV radiation. A carotenoid gene (crtR-B) from the green alga Haematococcus pluvialis, encoding beta-carotene hydroxylase that was able to catalyze the conversion of beta-carotene to zeaxanthin and canthaxanthin to astaxanthin, was cloned into Chlamydomonas reinhardtii chloroplast expression vector p64D to yield plasmid p64DcrtR-B. The vector p64DcrtR-B was transferred to the chloroplast genome of C. reinhardtii using micro-particle bombardment. PCR and Southern blot analyses indicated that crtR-B was integrated into the chloroplast genome of the transformants. RTPCR assays showed that the H. pluvialis crt R-B gene was expressed in C. reinhardtii transformants. The transformants rapidly synthesized carotenoids in larger quantities than the wild-type upon being transferred from moderate to high-intensity white light. This research provides a foundation for further study to elucidate the possible mechanism of photo-protection by xanthophylls and other carotenoids in high light conditions or through exposure to UV radiation. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Tan, Cong-Ping; Zhao, Fang-Qing; Su, Zhong-Liang; Liang, Cheng-Wei; Qin, Song.Expression of beta-carotene hydroxylase gene (crtR-B) from the green alga Haematococcus pluvialis in chloroplasts of Chlamydomonas reinhardtii,JOURNAL OF APPLIED PHYCOLOGY,2007,19(4):347-355 |
Palavras-Chave | #Biotechnology & Applied Microbiology; Marine & Freshwater Biology #Chlamydomonas reinhardtii #chloroplast transformation #beta-carotene hydroxylase gene (crtR-B) #carotenoids |
Tipo |
期刊论文 |