منابع مشابه
Selenocysteine in native chemical ligation and expressed protein ligation.
L-Selenocysteine (Sec or U) has been called the “21st amino acid”.1 Like the twenty common amino acids, selenocysteine is inserted during the translation of mRNA and has its own tRNASec and codon, UGA. This codon also serves as the opal stop codon. Decoding a UGA codon as one for selenocysteine requires a special structure in the 3′ untranslated region of the mRNA called a selenocysteine insert...
متن کاملSimplifying native chemical ligation with an N-acylsulfonamide linker.
We report a simplified procedure for the chemical ligation of peptides by using the sulfamylbutyryl linker as a mildly activating group capable of participating in ligation. When the peptidyl N-methylsulfonamide is directly added with excess thiols to ligation reactions, the speed of reaction is comparable to native chemical ligation.
متن کاملNative chemical ligation: a boon to peptide chemistry.
The use of chemical ligation within the realm of peptide chemistry has opened various opportunities to expand the applications of peptides/proteins in biological sciences. Expansion and refinement of ligation chemistry has made it possible for the entry of peptides into the world of viable oral therapeutic drugs through peptide backbone cyclization. This progression has been a journey of chemic...
متن کاملNative chemical ligation in covalent caspase inhibition by p35.
Wide-spectrum caspase inhibition by the baculoviral p35 protein was previously shown to be a consequence of covalent inhibition in which a thioester bond is stably formed between the cleavage residue Asp87 of p35 and the active site Cys360' of caspase-8. Here we show that the N-terminal fragment of cleaved p35 (p35-N) is a circular peptide when dissociated from the caspase. Biochemical and crys...
متن کاملExamination of native chemical ligation using peptidyl prolyl thioesters.
Peptidyl prolyl thioesters, which have been regarded as too unreactive for practical use in native chemical ligations (NCLs), were proven to be versatile reagents in peptide coupling. Tuning the reactivity of prolyl thioesters enabled a one-pot/sequential NCL reaction based on kinetically controlled ligation.
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ژورنال
عنوان ژورنال: ACS Chemical Biology
سال: 2009
ISSN: 1554-8929,1554-8937
DOI: 10.1021/cb900304p