Abstract
Fragments corresponding to the 83–98 sequence of the first extracellular loop and to the 168–192 and 171–182 sequences of the second extracellular loop of the M2-muscarinic receptor (antibodies to this receptor could be markers of early symptoms of heart disorders) were synthesized by solid phase method using the Fmoc-SPPS strategy. A new conformational antigen with the natural location of the disulfide bridge was prepared by selective formation of disulfide bond between the corresponding cysteine residues in the synthe-sized peptides and characterized. The comparative analysis of reactivity of the synthesized peptides towards sera from patients which had no organic heart disease was performed. A new conformational antigen was effectively bound to the sera from patients with idiopathic arrhythmias, but without symptoms of organic heart disease.
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Abbreviations
- Boc:
-
tert-butyloxycarbonyl
- BSA:
-
bovine serum albumin
- But :
-
tert-butyl
- DCM:
-
dichloromethane
- DIPEA:
-
N,N-diisopropylethylamine
- Fmoc:
-
9-fluorenylmethyloxycar-bonyl
- HOBT:
-
1-hydroxybenzotriazole
- MALDI:
-
matrix-assisted laser desorption/ionization
- NMP:
-
N-methylpyrroli-done
- MePip:
-
4-methylpiperidine
- PyS:
-
2-pyridinesulfenyl
- ODS:
-
octadecylsilyl
- Pmc:
-
2,2,5,7,8-pentamethylchroman-6-sulfonyl
- TBTU:
-
N,N,N′,N′-tetramethyl-O-(benzotriazole-1-yl)uronium tetrafluoroborate
- TIBS:
-
triisobutyl silane
- TFA:
-
tri-fluoroacetic acid
- HPLC:
-
high performance liquid chromatog-raphy
- EIA:
-
enzyme immunoassay
- CRD:
-
cardiac rhythm disturbance
- SPPS:
-
solid phase peptide synthesis. Other abbreviations used were recommended by IUPAC-IUB
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Original Russian Text © M.E. Palkeeva, M.V. Sidorova, A.S. Molokoedov, A.A. Az’muko, Zh.D. Bespalova, T.V. Sharf, E.N. Mamochkina, E.E. Efremov, M.M. Rogova, N.A. Mironova, K.A. Zykov, S.P. Golitsyn, 2013, published in Bioorganicheskaya Khimiya, 2013, Vol. 39, No. 3, pp. 285–292.
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Palkeeva, M.E., Sidorova, M.V., Molokoedov, A.S. et al. Synthetic conformational antigen which simulates the extracellular part of the M2-muscarinic receptor: interaction with blood sera of patients suffering from idiopathic arrhythmias. Russ J Bioorg Chem 39, 252–258 (2013). https://doi.org/10.1134/S1068162013030102
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DOI: https://doi.org/10.1134/S1068162013030102