摘要:
The present invention relates to fluorescent dyes based on acridine derivatives and use of such dyes, for example, in biochemical and/or cell based assays. A preferred feature of some of the dyes described is their long fluorescence lifetimes and their use to label biological molecules.
摘要:
Disclosed are compounds of formula: in which D is a fluorescent dye selected from an acridone and a quinacridone dye; F comprises a target bonding group selected from a carboxylic acid thioester group and a 1,2-aminothiol group; M is a group adapted for attaching to F; X is selected from hydrogen or the group: -L2-B wherein B is an affinity tag; and L1 and L2 each independently comprise a group containing from 1 to 40 linked atoms selected from carbon atoms which may optionally include one or more groups selected from —NR′—, —O—, —CH═CH—, —CO—NH— and phenylenyl groups, where R′ is selected from hydrogen and C1-C4 alkyl. The invention also relates to methods that afford direct attachment of the acridone or quinacridone dye to either the N-terminus or C-terminus of a synthetic or recombinant peptide or protein, and their derivatives, in a site-specific manner, coupled with purification of the resultant labelled molecule.
摘要:
A method of site specific labelling of an interferon molecule is provided. The method comprises the steps: a) providing a label molecule comprising a PEG moiety having an aldehyde or ketone moiety; b) providing an interferon molecule having a C terminal hydrazide moiety; and c) allowing the aldehyde or ketone moiety of the PEG moiety to react with the C terminal hydrazide of the interferon molecule to form a labelled interferon molecule, which comprises a PEG moiety attached to the C terminus of the interferon molecule via a hydrazone bond. Interferon molecules labelled using such a method are also described.
摘要:
A method of ligating two or more molecules, for example, peptides to peptides or peptides to labels is provided. The method may comprise the steps: a) providing a first oligopeptide having a reactive moiety, which is a hydrazine moiety, a hydrazide moiety or an amino-óxy moiety b) providing a second oligopeptide having an activated ester moiety, c)allowing the reactive moiety of the first oligopeptide to react with the activated ester moiety of the second oligopeptide to form an oligopeptide product, in which the first and second oligopeptides are linked via a linking moiety having Formula I, II or III. The second oligopeptide may preferably be generated by thiol reagent induced cleavage of an intein fusion protein. The invention further provides labelling and ligation methods in which protein hydrazides are ligated by reaction of the hydrazide moiety with an aldehyde functionality or a ketone functionality.
摘要:
An apheresis column loaded with a solid support comprises one or more chemokines, in particular biotinylated chemokines, immobilized directly or indirectly on the support, in particular on a support carrying streptavidin. Also disclosed are uses of the column and the support and a method of depleting cells, in particular leukocytes, from the peripheral blood of a person suffering from an inflammatory condition such as Inflammatory Bowel Disease (IBD).
摘要:
Disclosed is a tag for purification of peptides. The tag structure facilitates the easy cleavage of a bond formed between the tag molecule and a peptide to which it is bound under conditions which minimize, indeed preferably prevent, damage to the peptide. The tag molecules of the invention may be used to separate and/or purify a peptide from a mixture of peptides and/or other components.
摘要:
A method of ligating two or more molecules, for example, peptides to peptides or peptides to labels is provided. The method may comprise the steps: a) providing a first oligopeptide having a reactive moiety, which is a hydrazine moiety, a hydrazide moiety or an amino-óxy moiety b) providing a second oligopeptide having an activated ester moiety, c)allowing the reactive moiety of the first oligopeptide to react with the activated ester moiety of the second oligopeptide to form an oligopeptide product, in which the first and second oligopeptides are linked via a linking moiety having Formula I, II or III. The second oligopeptide may preferably be generated by thiol reagent induced cleavage of an intein fusion protein. The invention further provides labelling and ligation methods in which protein hydrazides are ligated by reaction of the hydrazide moiety with an aldehyde functionality or a ketone functionality.
摘要:
Compositions and methods are provided for identifying conformational changes in polypeptides related to the activity or biological state of the polypeptide. Semisynthetic polypeptides are prepared comprising at least two proximity-sensor peptides, the resultant composition capable of detectably indicating the activity of biological state of the polypeptide. Such compositions may be used to identify modulators of the polypeptides as well as modulators of molecules which interact with the polypeptide, such as protein kinases which act on protein kinase targets.
摘要:
Disclosed are compounds of formula: in which D is a dye selected from a cyanine dye or a derivative thereof; B is an affinity tag; F comprises a target bonding group selected from a carboxylic acid thioester group and a 1,2-aminothiol group; M is a group adapted for attaching to F; and L1 and L2 each independently comprise a group containing from 1 to 40 linked atoms selected from carbon atoms which may optionally include one or more groups selected from —NR′—, —O—, —CH═CH—, —CO—NH— and phenylenyl groups, where R′ is selected from hydrogen and C1-C4 alkyl. The invention also relates to methods that afford direct attachment of the cyanine dye reporter group to either the N-terminus or C-terminus of a synthetic or recombinant peptide or protein, and their derivatives, in a site-specific manner, coupled with purification of the resultant labelled molecule.