Water soluble multi-biotin-containing compounds
Water-soluble discrete multi-biotin-containing compounds with at least three (3) biotin moieties are disclosed. The water-soluble biotin-containing compounds may additionally comprise one or more moieties that confer resistance to cleavage by biotinidase or that is cleavable in vitro or in vivo. The discrete multi-biotin-containing compounds may include a reactive moiety that provides a site for reaction with yet another moiety, such as a targeting, diagnostic or therapeutic functional moiety. Biotinylation reagents comprising water-soluble linker moieties are also disclosed and may additionally comprise a biotinidase protective group. Methods for amplifying the number of sites for binding biotin-binding proteins at a selected target using multi-biotin compounds also are disclosed.
1. A composition of matter, which comprises a discrete biotin-containing compound of the general structural formula:
C-(L-P-B) n
wherein,
C is a multifunctional cross-linking moiety having discrete size and containing n substituents, which are reactive, or can be made reactive, with L;
L is a water-soluble linker moiety of discrete size containing 6 to 50 atoms in length and is one or more of alkyl, heteroalkyl, aryl, and heteroaryl linker moieties containing one or more of ethers, hydroxyls, amines, thioethers, thiols, esters, maleimides, iodoacetamides, hydroxyl amines, acyl hydrazines, carboxylic acids, polyphosphoric acids, phenols, sulfonic acids, iodoacetamides, aldehydes, nitrophenylazides, polylysines, ammoniums, amides, ketones, decaboranes, dodedaboranes, boranes, closo-carboranes, or nido-carboranes;
P is a biotinidase protective group that blocks biotinidase activity and is one or more of α-amino acids, N-methyl moieties, α-alkyl moieties, or aryl moieties;
B is selected from biotin moieties; and
n ranges from 3 to 64;
wherein said composition of matter is selected from the group consisting essentially of:
2. A composition of matter, which comprises a discrete biotin-containing compound of the general structural formula:
C-(L-B) n :
wherein
C is a multifunctional cross-linking moiety having discrete size and containing n substituents, which are reactive, or can be made reactive, with L;
L is a water-soluble linker moiety of discrete size containing 6 to 50 atoms in length and is one or more of alkyl, heteroalkyl, aryl, and heteroaryl linker moieties containing ethers, hydroxyls, amines, thioethers, thiols, esters, maleimides, iodoacetamides, hydroxylamines, acyl hydrazines, carboxylic acids, polyphosphoric acids, phenols, sulfonic acids, iodoacetamides, aldehydes, nitrophenylazides, polylysines, ammoniums, amides, ketones, decaboranes, dodedaboranes, boranes, closo- and nido-carboranes;
B is selected from biotin moieties; and
n ranges from 3 to 64;
wherein said composition of matter is selected from the group consisting essential of:
3. The composition of matter of claim 1 , which is represent by the following structure:
4. The composition of matter of claim 1 , which is represented by the following structure:
5. The composition of matter of claim 1 , which is represented by the following structure:
6. The composition of matter of claim 1 , wherein
C is benzene tricarboxylic acid,
L is 4,7,10-trioxa-1,13-diamine,
P is aspartate or aspartic acid,
B is biotin, and
n is 3.
7. The composition of matter of claim 2 , which is represented by the following structure:
8. The composition of matter of claim 2 , which is represented by the following structure:
9. The composition of matter of claim 2 , which is represented by the following structure:
10. The composition of matter of claim 2 , which is represented by the following structure:
11. The composition of matter of claim 2 , which can be represented by the following structure:
12. The composition of matter of claim 2 , which is represented by the following structure:
13. The composition of matter of claim 2 , which is represented by the following structure: