Annotated protein:Mu-type opioid receptor (M-OR-1) (MOR-1) (Opioid receptor B). Gene symbol: OPRM1. Taxonomy: Rattus norvegicus (Rat). Uniprot ID: P33535
antibody wiki:
SynGO gene info:SynGO data @ OPRM1
Ontology domain:Cellular Component
SynGO term:integral component of postsynaptic membrane (GO:0099055)
Synapse type(s):striatum
Annotated paper:Wang H, et al. "Preferential cytoplasmic localization of delta-opioid receptors in rat striatal patches: comparison with plasmalemmal mu-opioid receptors" J Neurosci. 2001 May 1;21(9):3242-50 PMID:11312309
Figure(s):Figure1, Figure 2, Figure 4b,c, Figure 6
Annotation description:The paper characterizes the sub cellular localization of both mu-type and delta-type opioid receptors using immuogold-silver and peroxidase labelling.
Figure 1 is a quantification of the labelled profiles, showing a very high labeling rate at dendritic spines.
Figure 2 presents a quantification, showing that in labelled spines, a large proportion of mu-type immunolabeling is at the membrane.
Figure 4b,c show two profiles of spines with mu-type immunoreactivity. The immunoreactivity is mostly at the extrasyanptic membrane.
Figure 6 is a scheme illustrating the main sub cellular localization of the receptors.

2/7/2017 Pim
- Literal: "In contrast to DOR, MOR was preferentially localized to the extrasynaptic plasma membrane of dendrites and spines"
Evidence tracking, Biological System:Intact tissue
Evidence tracking, Protein Targeting:Antibody (detection)
Evidence tracking, Experiment Assay:Electron Microscopy
Annotator(s):Noa Lipstein (ORCID:0000-0002-0755-5899)
Cordelia Imig (ORCID:0000-0001-7351-8706)
Vincent O'connor (ORCID:0000-0003-3185-5709)
Nils Brose (ORCID:0000-0003-0938-8534)
Lab:Department of Molecular Neurobiology, Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany
Additional literature:The paper describes the localization of mu-type opioid receptors at the Shell of the Rat Nucleus Accumbens. mu-type opioid receptors labeling was localized mainly to extrasynaptic plasma membranes at the post-synaptic neurons. @ PMID:9169542
SynGO annotation ID:873
Dataset release (version):20231201
View annotation as GO-CAM model:Gene Ontology