Abstract
Single-chain insulin/IGF-1 hybrid-[Ins/IGF-1(C)], single-chain porcine insulin precursor-(PIP), and B10Asp PIP were prepared by protein engineering. Their growth-promoting activities in mouse breast cancer cell line GR2H6 are 10, 0.2, and 2 times that of insulin, respectively, and 29%, 0.6%, and 6% of that of IGF-1, indicating that the C domain and 9Glu of IGF-1 are important for its growth-promoting activity. Given these results and previous reports, we propose that the C domain, 9Glu, and 23Phe-26Asn beta bend are involved in the growth-promoting functional region of IGF-1.
Original language | English (US) |
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Pages (from-to) | 321-325 |
Number of pages | 5 |
Journal | IUBMB Life |
Volume | 49 |
Issue number | 4 |
DOIs | |
State | Published - 2000 |
Keywords
- Growth-promoting functional region
- Hybrid molecule
- IGF-1
- Insulin