[EN] SITE-SPECIFIC RADIOFLUORINATION OF PEPTIDES WITH 8-[18F]-FLUOROOCTANOIC ACID CATALYZED BY LIPOIC ACID LIGASE<br/>[FR] RADIOFLUORATION SPÉCIFIQUE DE SITE DE PEPTIDES AVEC DE L'ACIDE 8-[18F]FLUOROOCTANOÏQUE CATALYSÉE PAR UNE ACIDE LIPOÏQUE LIGASE
申请人:UNIV CALIFORNIA
公开号:WO2017095806A1
公开(公告)日:2017-06-08
New methodologies for site-specifically radiolabeling proteins with the PET isotope [18F] are required to generate high quality radiotracers for imaging in both the preclinical and clinical settings. The enzymatic radiofluorination overcomes many of the limitations encountered to date with purely chemical approaches. The bacterial enzyme lipoic acid ligase was used to conjugate [18F]-fluorooctanoic acid to both a small peptide and a Fab antibody fragment. Labeling was site-specific and highly efficient under mild aqueous conditions using small amounts of peptide/protein (1-10 nmol). The labeled construct retained full epitope binding affinity and was stable in mouse serum. Using an optimized reaction scheme, mCi quantities of [18F]-Fab were generated, an amount sufficient for human imaging.
Methods and compositions for protein labeling using lipoic acid ligases
申请人:Ting Alice Y.
公开号:US20090149631A1
公开(公告)日:2009-06-11
The invention provides compositions and methods of use thereof for labeling peptide and proteins in vitro or in vivo. The methods described herein employ lipoic acid ligase or mutants thereof, and lipoic acid analogs recognized by lipoic acid ligase and lipoic acid ligase mutants.
Methods for detection of lysosomal storage disease
申请人:Zhang Xiaokui K.
公开号:US20080248513A1
公开(公告)日:2008-10-09
The present invention provides compositions for performing assays of enzyme activity associated with lysosomal storage diseases. The invention further provides methods for determining enzyme activity, and methods for the screening for lysosomal storage disease in an individual.
Biomolecular Labelling Using Multifunctional Biotin Analogues
申请人:Thomas Neil R.
公开号:US20120083599A1
公开(公告)日:2012-04-05
Novel biotin analogues, such as 2-Azidobiotin, comprising the ureido ring of natural biotin with the thiophene ring, optionally modified, and a modified sidechain having a functional end group, preferably selected from the group consisting of a carboxylic acid, amine, alcohol, thiol, aldehyde and a halide, and at least one bio-orthogonally reactive chemical group located elsewhere in the sidechain. The analogues are used for labelling target structures and biomolecules, such as peptides and proteins in vitro or in vivo.
The invention provides compositions and methods of use thereof for labeling peptide and proteins in vitro or in vivo. The methods described herein employ lipoic acid ligase or mutants thereof, and lipoic acid analogs recognized by lipoic acid ligase and lipoic acid ligase mutants.