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- W2020034029 abstract "Salmon calcitonin S-sulfonated analog (abbreviated as [S–SO3−]rsCT) was prepared by introducing two sulfonic groups into the side chains of Cys1 and Cys7 of recombinant salmon calcitonin. The hypocalcemic potency of this open-chain analog is 5500 IU/mg, which is about 30% higher than that (4500 IU/mg) of the wild type. The solution conformation of [S–SO3−]rsCT was studied in aqueous trifluoroethanol solution by CD, 2D-NMR spectroscopy, and distance geometry calculations. In the mixture of 60% TFE and 40% water, the peptide assumes an amphipathic α-helix in the region of residues 4–22, which is one turn longer than that of the native sCT. The structural feature analysis of the peptide revealed the presence of hydrophobic surface composed of five hydrophobic side chains of residues Leu4, Leu9, Leu12, Leu16, and Leu19, and a network of salt-bridges that consisted of a tetrad of oppositely charged side chains (Cys7-SO3−–Lys11+–Glu15−–Lys18+). The multiple salt bridges resulted in the stabilization of the longer amphipathic α-helix. Meanwhile, the higher hypocalcemic potency of the peptide could be attributed to the array of hydrophobic side chains of five leucine residues of the amphipathic α-helix." @default.
- W2020034029 created "2016-06-24" @default.
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- W2020034029 date "2003-06-01" @default.
- W2020034029 modified "2023-10-16" @default.
- W2020034029 title "Solution structure and biological activity of recombinant salmon calcitonin S-sulfonated analog" @default.
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- W2020034029 doi "https://doi.org/10.1016/s0006-291x(03)01028-3" @default.
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