Solution synthesis of calciseptine, an L-type specific calcium channel blocker.
Pept Res
; 5(5): 265-8, 1992.
Article
en En
| MEDLINE
| ID: mdl-1450521
ABSTRACT
Calciseptine, an L-type specific calcium channel blocker consisting of 60 amino acid residues with four intramolecular disulfide bonds, was synthesized by the solution procedure applying our maximum protection strategy. The recently developed solvent systems used were a mixture of chloroform or dichloromethane and trifluoroethanol; they were useful for the synthesis of slightly soluble protected peptides. After removal of all the protecting groups by our two-step HF procedure followed by treatment with mercuric acetate, the peptide was folded into its native form by air oxidation, in which redox reagents were necessary to accelerate the correct disulfide bond formation. The product was purified to homogeneity and found to block contractions of the rat thoracic aorta induced by 40 mM K+ with the same potency as that of the natural product. In addition, this peptide was found to block contractions of various rat smooth muscle preparations as well as increase in cytosolic free calcium concentration induced by a high concentration of extracellular K+.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Bloqueadores de los Canales de Calcio
/
Venenos Elapídicos
Límite:
Animals
Idioma:
En
Revista:
Pept Res
Asunto de la revista:
BIOQUIMICA
/
BIOTECNOLOGIA
Año:
1992
Tipo del documento:
Article
País de afiliación:
Japón