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The present invention relates to a process for the modification of a glycoprotein, using a -(1,4)-N-acetylgalactosaminyltransferase or a mutant thereof. The process comprises the step of contacting a glycoprotein comprising a glycan comprising a terminal GlcNAc-moiety, in the presence of a -(1,4)-N-acetylgalactosaminyl-transferase or a mutant thereof, with anon-natural sugar-derivative nucleotide. The non-natural sugar-derivative nucleotideis according to formula (3), wherein A is selected from the group consisting of N_(3); C(0)R^(3); CCR^(4); SH; SC(0)R^(8); SC(V)OR^(8), wherein V is O or S; X wherein X is selected from the group consisting of F, Cl, Br and I; OS(0)_(2)R^(5); an optionally substituted C_(2)-C_(24 )alkyl group; an optionally substituted terminal C_(2)-C_(24 )alkenyl group; and an optionally substituted terminal C_(3)-C_(24 )alkenyl group.


The present invention relates to a compound comprising an alpha-end and an omega-end, the compound comprising on the alpha-end a reactive group Qlcapable of reacting with a functional group F1present on a biomolecule and on the omega-end a target molecule, the compound further comprising a group according to formula (1) or a salt thereof: Said compound may also be referred to as a linker-conjugate. The invention also relates to a process for the preparation of a bioconjugate, the process comprising the step of reacting a reactive group Q1of a linker-conjugate according to the invention with a functional group F1of a biomolecule. The invention further relates to a bioconjugate obtainable by the process according to the invention. In a preferred embodiment, the invention concerns a process for the preparation of a bioconjugate via a cycloaddition, such as a (4+2)-cycloaddition (e.g. a Diels-Alder reaction) or a (3+2)-cycloaddition (e.g. a 1,3-dipolar cycloaddition).


The present invention relates to a compound comprising an alpha-end and an omega-end, the compound comprising on the alpha-end a reactive group Q^(1 )capable of reacting with a functional group F^(1 )present on a biomolecule and on the omega-end a target molecule, the compound further comprising a group according to formula (1) or a salt thereof: Said compound may also be referred to as a linker-conjugate. The invention also relates to a process for the preparation of a bioconjugate, the process comprising the step of reacting a reactive group Q^(1 )of a linker-conjugate according to the invention with a functional group F^(1 )of a biomolecule. The invention further relates to a bioconjugate obtainable by the process according to the invention.


The present invention relates to a process for the enzymatic modification of a glycoprotein. The process comprises the step of contacting a glycoprotein comprising a glycan comprising a terminal GlcNAc-moiety, in the presence of glycosyltransferase that is, or is derived from, a -(1,4)-N-acetylgalactosaminyltransferase, with a non-natural sugar-derivative nucleotide. The non-natural sugar-derivative nucleotide is according to formula (3): wherein A is selected from the group consisting of N_(3), C(O)R^(3), (CH_(2))_(i)CCR^(4), SH, SC(O)R^(8), SC(0)OR8, SC(S)OR8, F, CI, Br I, OS(O)_(2)R^(5), terminal C_(2)-C_(24 )alkenyl groups, C_(3)-C_(5 )cycloalkenyl groups, C_(4)-C_(8 )alkadienyl groups, terminal C_(3)-C_(24 )allenyl groups and amino groups. The invention further relates to a glycoprotein obtainable by the process according to the invention, to a bioconjugate that can be obtained by conjugating the glycoprotein with a linker-conjugate, and to -(1,4)-N-acetylgalactosaminyltransferases that can be used in preparing the the glycoprotein according to the invention.


A process is provided, comprising reacting a (hetero)aryl 1,3-dipole compound with a (hetero)cycloalkyne, wherein the (hetero)aryl 1,3-dipole compound comprises a 1,3-dipole functional group bonded to a (hetero)aryl group, and wherein the (hetero)aryl 1,3-dipole compound is a (hetero)aryl azide or a (hetero)aryl diazo compound; wherein: (i) the (hetero)aryl group of the (hetero)aryl 1,3-dipole compound comprises a substituent (ii) the (hetero)aryl group of the (hetero)aryl 1,3-dipole compound is an electron-poor (hetero)aryl group and wherein the (hetero)cycloalkyne is a (hetero)cyclooctyne or a (hetero)cyclononyne according to Formula (1). The invention also relates to the products obtainable by the process according to the invention.


The present invention relates to a process for attaching an N-acetylgalactosamine-(hetero)arylmoiety to an N-acetylglucosaminemoiety, the process comprising the step of contacting the N-acetylgalactosamine-(hetero)arylmoiety with the N-acetylglucosaminemoiety in the presence of a mutant galactosyltransferase, wherein the N-acetylglucosaminemoiety is according to Formula (1) the N-acetylgalactosamine-(hetero)arylmoiety is according to Formula (2): In a particularly preferred embodiment of the process according to the invention, the N-acetylgalactosamine-(hetero)arylmoiety comprises a 1,3-dipole functional group, and the N-acetylglucosaminemoiety is a terminal GlcNAc moiety of a glycoprotein glycan. The invention further relates to a product obtainable by the process according to the invention, in particular to glycoproteins. Also, the invention relates to several compounds comprising an N-acetylgalactosamine-(hetero)arylmoiety.


The present invention relates to a cycloaddition process comprising the step of reacting a halogenated aliphatic 1,3-dipole compound with a (hetero)cycloalkyne according to Formula (1): Preferably, the (hetero)cycloalkyne according to Formula (1) is a (hetero)cyclooctyne. The invention also relates to the cycloaddition products obtainable by the process according to the invention. The invention further relates to halogenated aliphatic 1,3-dipole compounds, in particular to halogenated aliphatic 1,3-dipole compounds comprising N-acetylgalactosamine-UDP (GalNAc-UDP), and to halogenated 1,3-dipole compounds comprising (peracylated) N-acetylglucosamine (GlcNAc), N-acetylgalactosamine (GalNAc), N-acetylmannosamine (ManNAc) and N-acetyl neuraminic acid (NeuNAc).


The invention relates to fused cyclooctyne compounds, and to a method for their preparation. The invention also relates to a conjugate wherein a fused cyclooctyne compound according to the invention is conjugated to a label, and to the use of these conjugates in bioorthogonal labeling, imaging and/or modification, such as for example surface modification, of a target molecule. The invention further relates to a method for the modification of a target molecule, wherein a conjugate according to the invention is reacted with a compound comprising a 1,3-dipole or a 1,3-(hetero)diene.


An antibody comprising a GlcNAc-S(A)_(x )substituent is disclosed, wherein S(A)_(x )is a sugar derivative comprising x functional groups A wherein A is independently selected from the group consisting of an azido group, a keto group and an alkynyl group and x is 1, 2, 3 or 4, wherein said GlcNAc-S(A)_(x )substituent is bonded to the antibody via C1 of the N-acetylglucosamine of said GlcNAc-S(A)_(x )substituent, and wherein said N-acetylglucosamine is optionally fucosylated. Also disclosed is an antibody-conjugate, in particular to an antibody-conjugate according to the Formula (20) or (20b), wherein AB is an antibody, S is a sugar or a sugar derivative, D is a molecule of interest, and wherein said N-acetylglucosamine is optionally fucosylated (b is 0 or 1). Also disclosed is a process for the preparation of a modified antibody, to a process for the preparation of an antibody-conjugate, and to said antibody-conjugate for use as a medicament.


The invention relates to fused cyclooctyne compounds, and to a method for their preparation. The invention also relates to a conjugate wherein a fused cyclooctyne compound according to the invention is conjugated to a label, and to the use of these conjugates in bioorthogonal labeling, imaging and/or modification, such as for example surface modification, of a target molecule. The invention further relates to a method for the modification of a target molecule, wherein a conjugate according to the invention is reacted with a compound comprising a 1,3-dipole or a 1,3-(hetero)diene.

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