Induction of a prenylated 65-kd protein in macrophages by interferon or lipopolysaccharide.
Treatment of murine bone marrow-derived macrophages with interferon-gamma (IFN-gamma) and/or lipopolysaccharide (LPS) resulted in changes in the abundance of a number of prenylated proteins. The most significant change involved a protein of 65 kd (p65) that became one of the most abundant prenylated proteins following treatment. The 65-kd protein was induced by agents that stimulate macrophage activation (IFNs or LPS) but not by cytokines that promote macrophage proliferation, such as granulocyte-macrophage colony-stimulating factor (GM-CSF), M-CSF, or interleukin-3. The majority of p65 was localized to subcellular fractions containing internal and plasma membranes but was not detected in nuclear membranes. The farnesyltransferase inhibitor BZA-5B caused a dramatic decrease in p65 prenylation, suggesting that this protein may be modified by the C15 isoprenoid farnesyl. These observations provide the first direct evidence that interferons and LPS cause changes in the abundance of specific isoprenoid-modified proteins in macrophages.
Vestal
D J
DJ
La Jolla Cancer Research Foundation, California 92037, USA.
Maki
R A
RA
Buss
J E
JE
D019883:Alkyl and Aryl Transferases; D000818:Animals; D001569:Benzodiazepines / Q000494:pharmacology; D001854:Bone Marrow Cells; D004791:Enzyme Inhibitors / Q000494:pharmacology; D051231:Farnesyltranstransferase; D019833:Genistein; D006133:Growth Substances / Q000494:pharmacology; D007371:Interferon-gamma / Q000008:administration & dosage*; D007529:Isoflavones / Q000494:pharmacology; D008070:Lipopolysaccharides / Q000008:administration & dosage*; D008262:Macrophage Activation; D008264:Macrophages / Q000378:metabolism*; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008970:Molecular Weight; D009000:Monocytes / Q000378:metabolism*; D009842:Oligopeptides / Q000494:pharmacology; D017368:Protein Prenylation; D011505:Protein-Tyrosine Kinases / Q000037:antagonists & inhibitors; D014166:Transferases / Q000037:antagonists & inhibitors; D014407:Tumor Cells, Cultured
C090156:BZA 5B; D004791:Enzyme Inhibitors; D006133:Growth Substances; D007529:Isoflavones; D008070:Lipopolysaccharides; D009842:Oligopeptides; D001569:Benzodiazepines; D007371:Interferon-gamma; D019833:Genistein; D014166:Transferases; D019883:Alkyl and Aryl Transferases; D051231:Farnesyltranstransferase; D011505:Protein-Tyrosine Kinases