Abstract
The first twenty-nine amino acids of human Growth Hormone Releasing Factor (hGRF) possess a distinct amphiphilic character. This is seen as twisted hydrophobic and hydrophilic bands in the helical net projection. Four amidated analogs were designed by optimizing amphiphilic and helical potentials of the native sequence. These designed analogs, with up to eight-amino acid changes, were tested in sheep via intravenous injection. The growth hormone-stimulating activities of the analogs were significantly higher when compared to bovine Growth Hormone Releasing Factor (bGRF44-NH2). This suggests that the amphiphilic conformation of GRF(1-29) is important to the receptor.
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More From: Biochemical and Biophysical Research Communications
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