title: Assembly of M13 and M13am8H1R1 procoat protein into microsomes is stimulated by rabbit reticulocyte lysate and ATP.
abstract: Processing of M13 procoat protein to transmembrane coat protein by dog pancreas microsomes is stimulated by a component of rabbit reticulocyte lysate and ATP. We asked whether this ATP-dependent reaction, involved in membrane assembly of procoat protein in the eukaryotic system, is related to the membrane potential dependent reaction observed for the membrane assembly of procoat protein in E. coli. Specifically, we asked if a mutant procoat protein which had been previously shown to be independent of the membrane potential with respect to its assembly in E. coli (M13am8H1R1 procoat protein) shows a stimulation by reticulocyte lysate and ATP in its assembly into microsomes. Since the mutant procoat protein behaved exactly as the wild type procoat protein in the eukaryotic in vitro system, we propose that the ATP-dependent reaction observed for the eukaryotic system does not substitute for the membrane potential dependent reaction in the prokaryotic system.
authors.affiliation: Institut für Physiologische Chemie der Universität München, Federal Republic of Germany.
authors.forename: M
authors.initials: M
authors.lastname: Sagstetter
authors.forename: R
authors.initials: R
authors.lastname: Zimmermann
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism*; D000818:Animals; D001425:Bacterial Outer Membrane Proteins / Q000378:metabolism*; D002213:Capsid / Q000235:genetics / Q000378:metabolism*; D003090:Coliphages / Q000235:genetics / Q000378:metabolism; D004285:Dogs; D004926:Escherichia coli / Q000378:metabolism; D066298:In Vitro Techniques; D008564:Membrane Potentials; D008565:Membrane Proteins / Q000378:metabolism*; D008861:Microsomes / Q000378:metabolism*; D009154:Mutation; D011498:Protein Precursors / Q000378:metabolism; D011499:Protein Processing, Post-Translational; D012156:Reticulocytes / Q000502:physiology
chemical_list: D001425:Bacterial Outer Membrane Proteins; D008565:Membrane Proteins; D011498:Protein Precursors; D000255:Adenosine Triphosphate