Exploitation of Subtilisin BPN‘ as Catalyst for the Synthesis of Peptides Containing Noncoded Amino Acids, Peptide Mimetics and Peptide Conjugates
摘要:
The ability of the serine protease subtilisin BPN' to catalyze peptide bond formation between fragments containing noncoded amino acids, peptide mimetics, and peptide conjugates in a kinetic approach was explored. It was found that the enzyme accepts numerous of these types of compounds both as acyl donor and acyl acceptor. The results together with specificity studies reported by others provide an active site model as a guideline in the design of enzymatic synthesis of biologically important compounds.
Phosphonic acid and phosphinic acid tripeptides as inhibitors of glutathionylspermidine synthetase
摘要:
A series of phosphonic and phosphinic acid derivatives of glutathione were synthesized as potential inhibitors of glutathionylspermidine synthetase, an essential enzyme in the biosynthesis of trypanothione in trypanosomatids. The compounds showed moderate activity.
Bioisosteres of 9-Carboxymethyl-4-oxo-imidazo[1,2- a ]indeno[1,2- e ]pyrazin-2-carboxylic acid derivatives. Progress towards selective, potent In Vivo AMPA antagonists with longer durations of action
A novel series of 2- and 9-disubstituted heterocyclic-fused 4-oxo-indeno[1,2-e]pyrazin derivatives was synthesized. One of them, the 9-(1 H-tetrazol-5-ylmethyl)-4-oxo-5,10-dihydroimidazo[1,2-a]indeno[1,2-e]pyrazin-2-yl phosphonic acid 4i exhibited a strong and a selective binding affinity for the AMPA receptor (IC50 = 13 nM) and demonstrated potent antagonist activity (IC50 = 6 nM) at the ionotropic AMPA receptor. This compound also displayed good anticonvulsant properties against electrically-induced convulsions after ip and iv administration with ED50 values between 0.8 and 1 mg/kg. Furthermore, a strong increase in potency was observed when given iv 3 h before test (ED50 = 3.5 instead of 25.6 mg/kg for the corresponding 9-carboxymethyl-2-carboxylic acid analogue). These data confirmed that there is an advantage in replacing the classical carboxy substituents by their bioisosteres such as tetrazole or phosphonic acid groups. (C) 2001 Elsevier Science Ltd. All rights reserved.
Phosphonic acid and phosphinic acid tripeptides as inhibitors of glutathionylspermidine synthetase
作者:Christophe Verbruggen、Sofie De Craecker、Padinchare Rajan、Xian-Yun Jiao、Marianne Borloo、Keith Smith、Alan H. Fairlamb、Achiel Haemers
DOI:10.1016/0960-894x(96)00001-7
日期:1996.2
A series of phosphonic and phosphinic acid derivatives of glutathione were synthesized as potential inhibitors of glutathionylspermidine synthetase, an essential enzyme in the biosynthesis of trypanothione in trypanosomatids. The compounds showed moderate activity.
Exploitation of Subtilisin BPN‘ as Catalyst for the Synthesis of Peptides Containing Noncoded Amino Acids, Peptide Mimetics and Peptide Conjugates
作者:Wilna J. Moree、Pamela Sears、Katsuhiro Kawashiro、Krista Witte、Chi-Huey Wong
DOI:10.1021/ja964399w
日期:1997.4.1
The ability of the serine protease subtilisin BPN' to catalyze peptide bond formation between fragments containing noncoded amino acids, peptide mimetics, and peptide conjugates in a kinetic approach was explored. It was found that the enzyme accepts numerous of these types of compounds both as acyl donor and acyl acceptor. The results together with specificity studies reported by others provide an active site model as a guideline in the design of enzymatic synthesis of biologically important compounds.