Cloning, expression, purification, and characterization of AmphiTip30, a member of short-chain dehydrogenases/reductases family from the amphioxus Branchiostoma belcheri tsingtauense.
In this paper we describe the cloning, expression and identification study of the TIP30 gene from amphioxus (Branchiostoma belcheri). The amphioxus TIP30 cDNA is comprised of 1499 bp and is translated in one open-reading frame to give a protein of 237 amino acids, with a predicted 23 amino acids signal peptide, a 147 bp 5'-UTR and a 638 bp 3'-UTR. A multiple alignment of TIP30 from amphioxus with other known TIP30 sequences shows the conservation of most amino acid residues involved in the peculiar structural domains found within TIP30's. Phylogenetic analysis places AmphiTIP30 at the base of the phylogenetic tree, suggesting that AmphiTIP30 is the archetype of the vertebrate TIP30 genes. We express the amphioxus TIP30 gene in Escherichia coli. driven by T7 promoter. The recombinant amphioxus TIP30 protein was purified by HisTrap affinity column. Subsequently, the binding constant and enzyme activity was mensurated. Western blot and immunohistochemistry analysis confirmed that amphioxus has a native molecular mass of approximately 26 kDa, and TIP30 was strongly expressed in ovary. Finally, the initial function of TIP30 is discussed.
Wang
Shaohui
S
School of Life Sciences, Shandong University of Technology, 12 Zhangzhou Road, Zibo 255049, PR China.
Zhao
Bosheng
B
Zhang
Shicui
S
Ji
Hongfang
H
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D002816:Chordata, Nonvertebrate / Q000235:genetics*; D003001:Cloning, Molecular; D004926:Escherichia coli / Q000235:genetics; D005260:Female; D015870:Gene Expression; D007150:Immunohistochemistry; D008623:Mercaptoethanol / Q000378:metabolism; D008969:Molecular Sequence Data; D008970:Molecular Weight; D009243:NAD / Q000378:metabolism; D016366:Open Reading Frames; D010053:Ovary / Q000378:metabolism; D010088:Oxidoreductases / Q000737:chemistry* / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism*; D010802:Phylogeny; D011401:Promoter Regions, Genetic; D011485:Protein Binding; D021382:Protein Sorting Signals; D017434:Protein Structure, Tertiary; D011994:Recombinant Proteins / Q000737:chemistry / Q000302:isolation & purification / Q000378:metabolism
D021382:Protein Sorting Signals; D011994:Recombinant Proteins; D009243:NAD; D008623:Mercaptoethanol; D010088:Oxidoreductases