Summary.
A series of insect oostatic peptides containing 3,4-dehydroproline in the C-terminal part or inside of the peptide chain was synthesized and tritiated by addition of 3H2 to double bond of 3,4-dehydroproline residue. 3H-label was introduced also into tyrosine residue of oostatic tetra- and pentapeptides by isotopic exchange of benzyl β-hydrogens. In this way, three types of tritiated peptides were prepared, different in the radiolabeled amino acid position: [3H] Tyr-Asp-Pro-Ala-OH, H-Tyr-Asp-[3H] Pro-Ala-OH, [3H] Tyr-Asp-Pro-Ala-Pro-OH, H-Tyr-Asp-[3H] Pro-Ala-Pro-OH, H-Tyr-Asp-Pro-Ala-[3H] Pro-OH, H-Tyr-Asp-Pro-Ala-Pro5-[3H] Pro-OH and H-Asp-[3H] Pro-OH. These peptides made possible a highly sensitive comparative study on radioactivity incorporation into head and ovaries of the flesh fly Neobellieria bullata, which revealed this process to proceed differently. The reasons of the found differences are discussed.
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Abbreviations
- The nomenclature and symbols of amino acids follow the Recommendations of IUPAC/IUB Joint Commission on Biochemical Nomenclature. Eur J Biochem (1984) 138: 9–37.:
-
Additional abbreviations include:
- AA:
-
amino acid analysis
- AcOH:
-
acetic acid
- Boc:
-
tert-butoxycarbonyl
- BrZ:
-
2-bromobenzyloxycarbonyl
- DCC:
-
N,N′-dicyclohexylcarbodiimide
- DCM:
-
dichloromethane
- DIEA:
-
N,N-diisopropylethylamine
- DMA:
-
N,N-dimethylacetamide
- DMF:
-
N,N-dimethylformamide
- EDT:
-
ethane-1, 2-dithiol
- EtOAc:
-
ethyl acetate
- FAB MS:
-
fast atom bombardment mass spectrometry
- Fmoc:
-
(fluoren-1-yl-methoxy)carbonyl
- HOBt:
-
1-hydroxybenzotriazole
- OBzl:
-
benzyl ester
- OMe:
-
methyl ester
- OSu:
-
succinimide ester
- PE:
-
light petroleum
- tBu:
-
tert-butyl
- TFA:
-
trifluoroacetic acid
- TFE:
-
trifluoroethanol
- TFMSA:
-
trifluoromethane sulfonic acid
- TIS:
-
tri-isopropylsilane
- TOTU:
-
O-cyanoethoxycarbonylmethylidene amino-1,1,3,3-tetramethyl-uronium tetrafluoroborate
- TPTU:
-
O-(1,2-dihydro-2-oxo-1-pyridyl)-N,N,N′,N′-tetramethyluronium tetrafluoroborate
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Hlaváček, J., Černý, B., Bennettová, B. et al. Preparation of tritiated oostatic peptides for study of radioactivity incorporation in flesh fly Neobellieria bullata . Amino Acids 33, 489–497 (2007). https://doi.org/10.1007/s00726-006-0406-y
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DOI: https://doi.org/10.1007/s00726-006-0406-y