Abstract
A biotin derivative, namely biotin–aminocaproic acid–lysine (BAL), was synthesized with solid-phase chemistry, conjugated to a carrier-protein, and used for rabbit immunization. The aminocaproic acid–lysine “long-arm” was used in order to project the biotin-hapten above the carrier-protein surface. Lysine was selected due to its Nε-amino group, through which BAL was conjugated to the carrier-protein. BAL was synthesized on a commercially available resin with the Fmoc-solid-phase strategy; this has simplified the experimental procedure, overcome the need for intermediate purification steps, and led to a final product of high purity, with high yield. The anti-BAL antibodies recognized free biotin, as shown with an in-house-developed ELISA, in which biotin conjugated to a synthetic “lysine–dendrimer” was used to coat the ELISA microwells. In immunocytology and Western-blot experiments, the anti-BAL antibodies led to similar results with those obtained with streptavidin. Synthetic derivatives of hapten molecules that can be easily prepared with solid-phase chemistry, such as BAL, may be used for the development of specific antibodies for the corresponding hapten.
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Abbreviations
- 2-CTC:
-
2-Chloro-trityl-chloride
- ABTS:
-
2,2′-Azino-bis-(3-ethylbenzthiazoline-6 sulfonic acid) diammonium salt
- Aca:
-
Aminocaproic acid
- BCA:
-
Bicinchoninic acid
- Boc:
-
Tert-butoxycarbonyl
- Cy3:
-
Cyanide dye 3
- DAB:
-
3,3′-Diaminobenzidine
- DCM:
-
Dichloromethane
- DIC:
-
N,N′-Diisopropylcarbodiimide
- DMEM:
-
Dulbecco’s modified eagle medium
- DMF:
-
N,N′-Dimethylformamide
- DMSO:
-
Dimethyl-sulfoxide
- DTT:
-
Dithiothreitol
- EDC:
-
1-Ethyl-3-(3-dimethyl-amino-propyl) carbodiimide hydrochloride
- EDTA:
-
Ethylenediaminetetra acetate
- ELISA:
-
Enzyme-linked immunosorbent assay
- FCS:
-
Fetal calf serum
- FITC:
-
Fluorescein isothiocyanate
- Fmoc:
-
9-Fluorenylmethoxycarbonyl
- GA:
-
Glutaraldehyde
- HOBt:
-
Hydroxybenzotriazole
- HRP:
-
Horseradish peroxidase
- MW:
-
Molecular weight
- NHS-LC-Biotin:
-
N-Hydroxy-succinimidyl-long chain-biotin
- NP-40:
-
Nonyl phenoxylpolyethoxyl-ethanol
- OD:
-
Optical density
- PBS:
-
Phosphate-buffered saline
- PMSF:
-
Phenylmethylsulfonyl fluoride
- PPD:
-
p-Phenylenediamine
- r.t.:
-
Room temperature
- SDS-PAGE:
-
Sodium dodecyl sulfate-polyacrylamide gel electrophoresis
- THF:
-
Tetrahydrofuran
- TFA:
-
Trifluoroacetic acid
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Papasarantos, I., Klimentzou, P., Koutrafouri, V. et al. Solid-Phase Synthesis of a Biotin Derivative and its Application to the Development of Anti-Biotin Antibodies. Appl Biochem Biotechnol 162, 221–232 (2010). https://doi.org/10.1007/s12010-009-8870-y
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DOI: https://doi.org/10.1007/s12010-009-8870-y