Synthesis and structural characterization of carboxyethylpyrrole-modified proteins: mediators of age-related macular degeneration
摘要:
Protein modifications in which the e-amino group of lysyl residues is incorporated into a 2-(omega-carboxy-ethyl)pyrrole (CEP) are mediators of age-related macular degeneration (AMD). They promote both angiogenesis into the retina ('wet AMD') and geographic retinal atrophy ('dry AMD'). Blood levels of CEPs are biomarkers for clinical prognosis of the disease. To enable mechanistic studies of their role in promoting AMD, for example, through the activation of B- and T-cells, interaction with receptors, or binding with complement proteins, we developed an efficient synthesis of CEP derivatives, that is especially effective for proteins. The structures of tryptic peptides derived from CEP-modified proteins were also determined. A key finding is that 4,7-dioxoheptanoic acid 9-fluorenylmethyl ester reacts with primary amines to provide 9-fluorenylmethyl esters of CEP-modified proteins that can be deprotected in situ with 1,8-diazabicyclo[5.4.0]undec-7-ene without causing protein denaturation. The introduction of multiple CEP-modifications with a wide variety of CEP: protein ratios is readily achieved using this strategy. (C) 2009 Elsevier Ltd. All rights reserved.
Flavouring composition containing gamma-jasmolactone, the use of such a flavouring composition or gamma-jasmolactone per se for flavouring foodstuffs as well as the flavoured foodstuffs obtained
申请人:QUEST INTERNATIONAL B.V.
公开号:EP0473842A1
公开(公告)日:1992-03-11
The invention relates to flavouring compositions characterized by an effective amount of gamma-jasmolactone having the formula
as well as the use of these flavourings or gamma-jasmolactone per se for imparting, enhancing or improving the flavour, in particular the fruity character of foodstuffs and drinks.
WENKERT, E.;BAKUZIS, M. L. F.;BUCKWALTER, B. L.;WOODGATE, P. D., SYNTH. COMMUN., 1981, 11, N 7, 533-543
作者:WENKERT, E.、BAKUZIS, M. L. F.、BUCKWALTER, B. L.、WOODGATE, P. D.
DOI:——
日期:——
JPH03151372A
申请人:——
公开号:JPH03151372A
公开(公告)日:1991-06-27
US5783244A
申请人:——
公开号:US5783244A
公开(公告)日:1998-07-21
[EN] CARBOXYETHYLPYRROLE COMPOUNDS AND METHODS OF THEIR PRODUCTION<br/>[FR] COMPOSÉS CARBOXYÉTHYLPYRROLE ET PROCÉDÉS POUR LEUR PRODUCTION
申请人:CLEVELAND CLINIC FOUNDATION
公开号:WO2008089487A2
公开(公告)日:2008-07-24
[EN] The present invention involves methods of anchoring carboxyethylpyrrole (CEP) haptens to carriers via various linkers. Provided herein are 9-fluorenylmethyl (Fm) masked-CEP-linker acids and Fm masked-CEP-linker esters that are useful for the preparation of CEP-linker- carrier derivatives. Also provided are methods of preparing said Fm masked-CEP-linker acids, Fm masked-CEP-linker esters and CEP-linker-carrier derivatives. [FR] La présente invention concerne des procédés d'ancrage d'haptènes de carboxyéthylpyrrole (CEP) à des vecteurs via différents lieurs. L'invention concerne des 9-fluorénylméthyle (Fm) masqué-CEP-acides lieurs et des Fm masqué-CEP-esters lieurs qui sont utiles pour la préparation de dérivés CEP-lieur-vecteur. L'invention concerne également des procédés de préparation desdits Fm masqué-CEP-acides lieurs, desdits Fm masqué-CEP-esters lieurs et desdits dérivés CEP-lieur-vecteur.