6533b85efe1ef96bd12c09e3

RESEARCH PRODUCT

Studies on the interaction of C1q,a subcomponent of the first component of complement, with porins fromSalmonella minnesotaincorporated into artificial membranes

Michael LoosHelmut RingsdorfJörg MöllerfeldMaria Latsch

subject

congenital hereditary and neonatal diseases and abnormalitiesLuminescenceMacrophageLipid BilayersBiophysicsSynthetic membranePorinschemical and pharmacologic phenomenaBiochemistryIon ChannelsMembrane PotentialsLipid AMiceSalmonellaStructural BiologyGeneticsAnimalsHumansBlack lipid membraneLipid bilayerMolecular BiologyC1qCells CulturedMice Inbred BALB CLiposomeurogenital systemChemistryComplement C1qMacrophagesElectric Conductivitynutritional and metabolic diseasesMembranes ArtificialCell BiologyLiposomeKineticsCholesterolMembraneMembrane proteinBiochemistryOuter membrane proteinPorinPhosphatidylcholinesbacteriaBacterial outer membraneBacterial Outer Membrane Proteins

description

AbstractPurified outer membrane proteins (OMP) of Salmonella minnesota, Re-form, were incorporated into liposomes. These induced in macrophages a chemiluminescence signal identical to that of the intact Re-form. This signal was abolished by preincubation of porin-containing liposomes with purified C1q. Incorporation of isolated OMP into black lipid membranes (BLM) resulted in channel-formation which could not be inhibited by isolated C1q. Additionally, incubation of OMP-containing liposomes with BLM resulted in pore-formation within the BLM. This was amplified when lipid A was present within the liposomes. Preincubation of OMP-containing liposomes with purified C1q abolished pore-formation within the BLM.

yearjournalcountryeditionlanguage
1990-12-10FEBS Letters
https://doi.org/10.1016/0014-5793(90)80542-q