Lupane derivatives, their preparation and the pharmaceutical
申请人:Rhone-Poulenc Rorer S.A.
公开号:US05468888A1
公开(公告)日:1995-11-21
The present invention relates to new lupane dervivatives of the general formula: ##STR1## to their salts, to their preparation and to the pharmaceutical compositions which contain them.
A Genetically Encoded Norbornene Amino Acid for the Mild and Selective Modification of Proteins in a Copper-Free Click Reaction
作者:Emine Kaya、Milan Vrabel、Christian Deiml、Stefan Prill、Viviana S. Fluxa、Thomas Carell
DOI:10.1002/anie.201109252
日期:2012.4.27
Built in for clicks: A specially evolved pyrrolysyl‐tRNA synthetase from Methanosarcina mazei was used to incorporate a norbornene amino acid into proteins in E. coli. This unit can be site‐selectively modified under mild physiological conditions using a [3+2] cycloaddition reaction with nitrile imines (see scheme).
Synthetic L-pyrrolysine of formula I, and derivatives thereof, chemical methods of preparing these amino acids and derivatives, and methods of derivatizing these amino acids after incorporation into a peptide or protein.
Also provided are derivatives and methods of preparing derivatives, including addition of substituents at any substitutable position; modifications to the lysine alkyl chain; modifications of the pyrroline ring. Also provided are methods of adding labels to the pyrrolysine or derivative thereof.
BIOSYNTHETICALLY GENERATED PYRROLINE-CARBOXY-LYSINE AND SITE SPECIFIC PROTEIN MODIFICATIONS VIA CHEMICAL DERIVATIZATION OF PYRROLINE-CARBOXY-LYSINE AND PYRROLYSINE RESIDUES
申请人:Geierstanger Bernhard
公开号:US20110262963A1
公开(公告)日:2011-10-27
Disclosed herein is pyrroline-carboxy-lysine (PCL), a pyrrolysine analogue, which is a natural, biosynthetically generated amino acid, and methods for biosynthetically generating PCL. Also disclosed herein are proteins, polypeptides and peptides that have PCL incorporated therein and methods for incorporating PCL into such proteins, polypeptides and peptides. Also disclosed herein is the site-specific derivatization of proteins, polypeptides and peptides having PCL or pyrrolysine incorporated therein. Also disclosed herein is the crosslinking of proteins, polypeptides and peptides having PCL or pyrrolysine incorporated therein.
The present invention refers to a method of incorporating non-genetically encoded amino acids at single or multiple positions of a protein and optionally the further modification of the side chains of said non-genetically encoded amino acids, e.g. by introduction of glycan groups. Further, the present invention refers to novel single or multiple glycosylated proteins.