| Luo Wenxin,Zhang Jun,Li Shaowei,Cheng Tong,Chen Min,Li Shaojing,Xia Ningshao. 2002. Cloning and expression of aequorin genes from jellyfish Aequorea and characterization of aequorins activities. Acta Oceanologica Sinica, (4):547－556 |
| Cloning and expression of aequorin genes from jellyfish Aequorea and characterization of aequorins activities |
| Cloning and expression of aequorin genes from jellyfish Aequorea and characterization of aequorins activities |
| Received:March 18, 2002 Revised:May 06, 2002 |
| DOI： |
| Key words:Aequorea macrodactyla Aequorea parva aequorin expression |
| 中文关键词: Aequorea macrodactyla Aequorea parva aequorin expression |
| 基金项目:This work was supported in parts by Hitech Research and Development Programme of China("863" Programme)under contract No.819-Q-06; the National Natural Science Foundation of China under contract No.C01040101 and the Natural Science Foundation of Fujian of China under contract No.C0010001. |
| Author Name | Affiliation | | Luo Wenxin | Cell Biology and Tumor Cell Engineering Laboratory, Ministry of Education, Xiamen University, Xiamen 361005, China | | Zhang Jun | Cell Biology and Tumor Cell Engineering Laboratory, Ministry of Education, Xiamen University, Xiamen 361005, China | | Li Shaowei | Cell Biology and Tumor Cell Engineering Laboratory, Ministry of Education, Xiamen University, Xiamen 361005, China | | Cheng Tong | Cell Biology and Tumor Cell Engineering Laboratory, Ministry of Education, Xiamen University, Xiamen 361005, China | | Chen Min | Cell Biology and Tumor Cell Engineering Laboratory, Ministry of Education, Xiamen University, Xiamen 361005, China | | Li Shaojing | Cell Biology and Tumor Cell Engineering Laboratory, Ministry of Education, Xiamen University, Xiamen 361005, China | | Xia Ningshao | Cell Biology and Tumor Cell Engineering Laboratory, Ministry of Education, Xiamen University, Xiamen 361005, China |
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| Abstract: |
| Two new aequorin genes, aeqxm and aeqxxm, were isolated from jellyfish Aequorea macrodactyla and Aequorea parva respectively, which are commonly found in the warmer waters on the coastal region of the East China Sea. The DNA sequences of the two genes have no introns and each one contains an ORF of 585 bp in full-length encoding a 195-aa protein. The two genes of aeqxm and aeqxxm share nuclcotide homologies of 80.7% and 85.1% with AEVAQ440X respectively, and the corresponding proteins share amino acid homologies of 84.7% and 84.2% with AEVAQ440X. High amino acid homology was found between apoaeqxm and apoaeqxxm. The two genes were cloned into expression vector pTO-T7 respectively, and the expression yields amounted to 40% of the total protein in E. coli BL21. The activities of the two photoproteins were reconstituted by incubating the expressed apoproteins with coelenterazine f. In the presence of Ca ion, both of the regenerated aeqxm and aeqxxm exhibited an emission peak at the wave length of 470 nm. |
| 中文摘要: |
| Two new aequorin genes, aeqxm and aeqxxm, were isolated from jellyfish Aequorea macrodactyla and Aequorea parva respectively, which are commonly found in the warmer waters on the coastal region of the East China Sea. The DNA sequences of the two genes have no introns and each one contains an ORF of 585 bp in full-length encoding a 195-aa protein. The two genes of aeqxm and aeqxxm share nuclcotide homologies of 80.7% and 85.1% with AEVAQ440X respectively, and the corresponding proteins share amino acid homologies of 84.7% and 84.2% with AEVAQ440X. High amino acid homology was found between apoaeqxm and apoaeqxxm. The two genes were cloned into expression vector pTO-T7 respectively, and the expression yields amounted to 40% of the total protein in E. coli BL21. The activities of the two photoproteins were reconstituted by incubating the expressed apoproteins with coelenterazine f. In the presence of Ca ion, both of the regenerated aeqxm and aeqxxm exhibited an emission peak at the wave length of 470 nm. |
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