title: Activation of the rabbit polymorphonuclear leukocyte membrane "Na+, K+"-ATPase by chemotactic factor.
abstract: Addition of the synthetic chemotactic factor, formyl-methionyl-leucyl-phenylala-nine (F-Met-Leu-Phe) to medium containing magnesium, sodium, and potassium results in a doubling of the "Na+, K+"-ATPase activity of the plasma membrane fraction from polymophonuclear leukocytes (PMN). This activation is sensitive to ouabain inhibition and is dose dependent, maximal activity occuring at 10(-9)MF-Met-Leu-Phe. Equivalent activation was observed with the nonformylated derivative Met-Leu-Phe at 10(-9)M. The dipeptide, carbobenzoxy-methionylphenylalanine, which acts as an antagonist for F-Met-Leu-Phe, prevents the stimulation of the "Na+, K+"-ATPase by F-Met-Leu-Phe.
mesh_terms: D000251:Adenosine Triphosphatases / Q000037:antagonists & inhibitors / Q000097:blood*; D000818:Animals; D002462:Cell Membrane / Q000201:enzymology; D002634:Chemotaxis, Leukocyte / Q000187:drug effects*; D004151:Dipeptides / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D004789:Enzyme Activation / Q000187:drug effects; D008715:Methionine / Q000031:analogs & derivatives*; D009239:N-Formylmethionine / Q000031:analogs & derivatives* / Q000494:pharmacology; D009504:Neutrophils / Q000201:enzymology*; D009842:Oligopeptides / Q000494:pharmacology*; D010042:Ouabain / Q000494:pharmacology; D011817:Rabbits
chemical_list: D004151:Dipeptides; D009842:Oligopeptides; D009239:N-Formylmethionine; D010042:Ouabain; D008715:Methionine; D000251:Adenosine Triphosphatases