Protein and production process and use thereof
[Problems] To provide a polypeptide having a novel structure and showing an activity of inhibiting angiogenesis or an activity of inhibiting osteoclastogenesis, and to provide a recombinant protein by constructing a method of purifying the above protein. To provide an ingredient useful in designing remedies for tendinitis, rheumatoid arthritis, arthritis deformans, malignant tumor, etc. [Means for Solving Problems] A novel soluble polypeptide protein.
1. A soluble polypeptide having an activity of inhibiting angiogenesis and/or an activity of inhibiting bone resorption selected from the group consisting of:
(a) a polypeptide consisting of the amino acid sequence of SEQ ID NO: 9;
(b) a polypeptide of (a), which further has a tag sequence added to the N-terminal or C-terminal thereof consisting of about 6 to about 8 consecutive histidine residues;
(c) a polypeptide of (a), which further has a FLAG tag sequence added to the N-terminal or C-terminal thereof;
(d) a polypeptide of (a), which further has tag sequences added to the N-terminal and/or C-terminal thereof consisting of about 6 to about 8 consecutive histidine residues and a FLAG tag sequence;
(e) a polypeptide of (a) to (d), which further has a methionine residue at the N-terminal thereof;
(f) a polypeptide of (a), which further has a glutamine residue at the N-terminal thereof;
(g) a polypeptide of (a), which further has a pyro-glutamine residue at the N-terminal thereof;
(h) a polypeptide of (b) to (d), wherein the amino acid residues added to the N-terminal and/or C-terminal thereof contain modified amino acid residues, which have at least one modified group selected from the group consisting of an acetyl group, formyl group, biotin group, Boc group and Fmoc group.
2. A composition comprising polypeptide of claim 1 .