Synthesis of a Negatively Charged Dibenzofuran-Based β-Turn Mimetic and Its Incorporation into the WW Miniprotein-Enhanced Solubility without a Loss of Thermodynamic Stability
摘要:
A versatile synthesis has been developed to functionalize the 4-(2-aminoethyl)-6-dibenzofuran propionic acid residue (1a) at the 2 and 8 positions with a variety of different substructures, The unfunctionalized version of this peptidomimetic (1a) is known to facilitate beta-hairpin formation in a variety of small peptides and proteins in aqueous solution when incorporated in place of the i + 1 and i + 2 residues of a U-turn. In this study, we append propionate substituents on 1 a at the 2 and 8 positions to successfully overcome solubility problems encountered with the incorporation of la in place of the i + 1 and i + 2 residues of the beta-turn in loop 1 of the WW domain. The thermodynamic stability of several WW domain analogues incorporating residues 1a and 1b was compared to that of the wild-type sequence revealing comparable DeltaG(H2O) unfolding values at 4 degreesC ranging from 3 to 3.6 kcal/mol. WW domains incorporating residue 1b exhibit improved solubility (exceeding 100 muM) and resistance to aggregation without compromising thermodynamic stability.
Synthesis of a Negatively Charged Dibenzofuran-Based β-Turn Mimetic and Its Incorporation into the WW Miniprotein-Enhanced Solubility without a Loss of Thermodynamic Stability
摘要:
A versatile synthesis has been developed to functionalize the 4-(2-aminoethyl)-6-dibenzofuran propionic acid residue (1a) at the 2 and 8 positions with a variety of different substructures, The unfunctionalized version of this peptidomimetic (1a) is known to facilitate beta-hairpin formation in a variety of small peptides and proteins in aqueous solution when incorporated in place of the i + 1 and i + 2 residues of a U-turn. In this study, we append propionate substituents on 1 a at the 2 and 8 positions to successfully overcome solubility problems encountered with the incorporation of la in place of the i + 1 and i + 2 residues of the beta-turn in loop 1 of the WW domain. The thermodynamic stability of several WW domain analogues incorporating residues 1a and 1b was compared to that of the wild-type sequence revealing comparable DeltaG(H2O) unfolding values at 4 degreesC ranging from 3 to 3.6 kcal/mol. WW domains incorporating residue 1b exhibit improved solubility (exceeding 100 muM) and resistance to aggregation without compromising thermodynamic stability.
Schwartz, Elaine Benaksas; Knobler, Carolyn B.; Cram, Donald J., Journal of the American Chemical Society, 1992, vol. 114, # 27, p. 10775 - 10784
作者:Schwartz, Elaine Benaksas、Knobler, Carolyn B.、Cram, Donald J.
DOI:——
日期:——
Synthesis of a Negatively Charged Dibenzofuran-Based β-Turn Mimetic and Its Incorporation into the WW Miniprotein-Enhanced Solubility without a Loss of Thermodynamic Stability
作者:Ramesh Kaul、Songpon Deechongkit、Jeffery W. Kelly
DOI:10.1021/ja020675x
日期:2002.10.1
A versatile synthesis has been developed to functionalize the 4-(2-aminoethyl)-6-dibenzofuran propionic acid residue (1a) at the 2 and 8 positions with a variety of different substructures, The unfunctionalized version of this peptidomimetic (1a) is known to facilitate beta-hairpin formation in a variety of small peptides and proteins in aqueous solution when incorporated in place of the i + 1 and i + 2 residues of a U-turn. In this study, we append propionate substituents on 1 a at the 2 and 8 positions to successfully overcome solubility problems encountered with the incorporation of la in place of the i + 1 and i + 2 residues of the beta-turn in loop 1 of the WW domain. The thermodynamic stability of several WW domain analogues incorporating residues 1a and 1b was compared to that of the wild-type sequence revealing comparable DeltaG(H2O) unfolding values at 4 degreesC ranging from 3 to 3.6 kcal/mol. WW domains incorporating residue 1b exhibit improved solubility (exceeding 100 muM) and resistance to aggregation without compromising thermodynamic stability.