
PSD-95orSAP90isthebeststudiedmemberoftheMAGUK-familyofPDZdomain-containingproteins.LikeallMAGUK-familyproteins,itsbasicstructureincludesthreePDZdomains,anSH3domain,andaguanylatekinase-likedomain(GK)connectedbydisorderedlinkerregions.Itisalmostexclusivelylocatedinthepostsynapticdensityofneurons,[1]andisinvolvedinanchoringsynapticproteins.Itsdirectandindirectbindingpartnersincludeneuroligin,NMDAreceptors,AMPAreceptors,andpotassiumchannels.PSD-95isaexcellentMarkerforpostsynpaticmechanisms.
Image:PSD-95(green)andKv4.2(red)stainingofrathippocampalneurons.
Note:ThisantibodyhasbeendevelopedbyUCDavisunderagrantbyNIH.