74034-99-4Relevant academic research and scientific papers
Fluorescent analogues of the insect neuropeptide helicokinin I: Synthesis, photophysical characterization and biological activity
Chen, Heru,Scherkenbeck, Juergen,Zdobinsky, Tino,Antonicek, Horst
scheme or table, p. 431 - 436 (2011/12/14)
In insects numerous physiological processes are regulated by neuropeptides. Two fluorescent analogues of the amino acids tryptophan and tyrosine were synthesized and incorporated in the diuretic neuropeptide helicokinin I from the moth Heliothis zea. By fluorescence emission measurements it was shown that both fluorescent helicokinin I analogues react sensitive on the dielectricity of their microenvironment. A helicokinin I analogue containing the fluorescent tryptophan mimic β-[6'-(N,N-dimethyl)-amino-2'-naphthoyl]alanine (Ald) was shown to bind to dodecylphosphocholine (DPC) micelles by the Ald residue. A membrane binding model for helicokinin I is proposed based on data from related mammalian and insect-neuropeptides.
24. Stoffwechselprodukte von Mikroorganismen. Ueber das 4-Oxo-homotyrosin, ein Abbauprodukt des Echinocandins B
Keller-Schierlein, Walter,Joos, Beda
, p. 250 - 254 (2007/10/02)
D,L-4-Oxo-homotyrosine was synthesized by the acetylaminomalonic ester pathway.The optical resolution was carried out by means of the enzyme acylase I.The L-configuration of the enzymatically produced amino acid was confirmed by degradation to L-aspartic acid. 4-Oxo-homotyrosine obtained by degradation of the polypeptide antibiotic echinocandine B has D-configuration, but his optical purity is low.A hypothetical explanation for its formation from the (2S,3S,4S)-3,4-dihydroxyhomotyrosine residue of echinocandine B is proposed.
