title: Conformational studies of synthetic tripeptide chemoattractants.
abstract: The conformational behavior of the chemotactic peptide analogs formylmethionylleucylphenylalanine methyl ester (CHO-Met-Leu-Phe-OMe) and formylmethionylleucylcyclohexylalanine methyl ester (CHO-Met-Leu-Cha-OMe) has been studied in solvents of different polarity by circular dichroism and infrared absorption. Both analogs and very probably the chemotactic peptide formylmethionylleucylphenylalanine (CHO-Met-Leu-Phe-OH) preferably adopt in solution a folded "active" conformation which allows a strong interaction with the receptor on the human polymorphonuclear leukocyte surface.
mesh_terms: D002634:Chemotaxis, Leukocyte; D002942:Circular Dichroism; D006801:Humans; D007962:Leukocytes / Q000187:drug effects / Q000502:physiology; D009240:N-Formylmethionine Leucyl-Phenylalanine / Q000031:analogs & derivatives* / Q000138:chemical synthesis*; D009842:Oligopeptides / Q000138:chemical synthesis* / Q000494:pharmacology; D011487:Protein Conformation; D013329:Structure-Activity Relationship
chemical_list: D009842:Oligopeptides; D009240:N-Formylmethionine Leucyl-Phenylalanine