| 1991 |
NrCAM (Nr-CAM) was identified as a new nervous system glycoprotein with a domain structure comprising six Ig-like domains, five fibronectin type III repeats, a transmembrane domain, and a short cytoplasmic domain, encoded by a single gene subject to alternative splicing yielding multiple isoforms. |
cDNA cloning, protein purification, SDS-PAGE, Northern/Southern blotting, immunofluorescence |
The Journal of cell biology |
High |
2045418
|
| 1992 |
NrCAM mediates two distinct modes of cell adhesion: a homophilic, divalent cation-independent binding between neurons, and a heterophilic, divalent cation-dependent binding between neurons and other cell types (e.g., fibroblasts). The homophilic binding activity maps to the Ig domains and first FNIII repeat of the extracellular region. |
L-cell transfection aggregation assays, recombinant GST-Ig domain fusion protein (FGTNr) binding to cells and Covaspheres, antibody blocking |
The Journal of cell biology |
High |
1527169
|
| 1992 |
NrCAM/Bravo is a heterodimer composed of an α chain (~140/130 kD) and a β chain (60–80 kD) generated by proteolytic cleavage of an intact polypeptide at conserved Ser-Arg/Lys-Arg sites, analogous to L1 and Ng-CAM cleavage. |
cDNA cloning, protein biochemistry, SDS-PAGE of purified protein |
The Journal of cell biology |
High |
1512296
|
| 1993 |
NrCAM/Bravo on axonal surfaces acts as a receptor for heterophilic binding to F11 (contactin family), and this interaction mediates neurite outgrowth of tectal cells. The binding site on F11 maps to the second or third Ig-like domain. |
Neurite outgrowth assays, antibody-blocking experiments, COS cell expression of F11 deletion mutants, cell binding assays |
Neuron |
High |
8274278
|
| 1994 |
The cytoplasmic domains of NrCAM (and neurofascin, L1, NgCAM, neuroglian) directly associate with ankyrins (spectrin-binding proteins), providing a membrane-cytoskeletal linkage. NrCAM and neurofascin together constitute >0.5% of membrane protein in adult brain. |
In vitro biochemical binding assays between purified cytoplasmic domain constructs and ankyrin, protein quantification from brain membrane fractions |
The Journal of biological chemistry |
High |
7961622
|
| 1995 |
In vivo, axonin-1 on commissural growth cones interacts with NrCAM on floor plate cells to guide commissural axons across the spinal cord midline; perturbation of either interaction causes commissural axons to fail to cross the midline and turn along the ipsilateral floor plate border. |
In vivo antibody perturbation in chick embryo spinal cord, immunohistochemistry |
Neuron |
High |
7541632
|
| 1995 |
NrCAM on peripheral glial cells serves as a receptor for axonin-1 on neurites, and this heterophilic interaction mediates neurite–glial cell contact formation during the early phase of axon ensheathment in dorsal root ganglia. |
Fluorescent microsphere binding assays with purified axonin-1 and NrCAM, antibody blocking of neurite–glia contact in DRG cultures |
The Journal of cell biology |
High |
7490283
|
| 1996 |
NrCAM and neurofascin (NF) interact heterophilically through their Ig domains; immobilized neurofascin induces neurite outgrowth of tectal cells via NrCAM on the axonal surface, while immobilized NrCAM induces neurite outgrowth via F11 (not neurofascin) as the axonal receptor. This heterophilic binding can be modulated by alternative splicing within neurofascin. |
Neurite outgrowth assays on immobilized substrates, antibody blocking, COS7 cell transfection binding assays, immunoprecipitation |
The Journal of cell biology |
High |
8922386
|
| 1996 |
NrCAM is concentrated at the node of Ranvier and at axon initial segments, co-localizing with ankyrinG and voltage-dependent sodium channels in myelinated axons. This is the first identification of defined neuronal CAMs at nodal axon segments. |
Immunofluorescence localization with isoform-specific antibodies; library screen identifying rat NrCAM; co-localization with ankyrinG and Na+ channels |
The Journal of cell biology |
High |
8947556
|
| 1997 |
NrCAM and contactin form a cis complex on the neuronal surface that serves as a receptor for glial RPTPβ; binding of RPTPβ to this complex (through its carbonic anhydrase domain) promotes neurite outgrowth and neuronal differentiation. |
Neurite outgrowth assays, antibody blocking, co-immunoprecipitation of contactin/NrCAM complex with RPTPβ-Fc fusion proteins, NIH-3T3 surface expression of RPTPβ |
The Journal of cell biology |
High |
9049255
|
| 1999 |
NrCAM serves as a ligand that promotes neurite outgrowth from peripheral (DRG and sympathetic) but not central neurons, and axonin-1 functions as the neuronal receptor for NrCAM in this context; antibodies to axonin-1 block NrCAM-Fc-induced outgrowth. |
NrCAM-Fc substrate neurite outgrowth assays with DRG, sympathetic, tectal, and forebrain neurons; antibody blocking; in ovo injection of NrCAM-Fc causing commissural axon guidance errors |
Developmental biology |
High |
10328925
|
| 1999 |
NrCAM acts as a receptor for F3/contactin on cerebellar granule cells; F3Fc-coated microspheres bind to growth cones via NrCAM (not L1), and their retrograde movement at the growth cone is coupled to actin filament retrograde flow—disruption by cytochalasin B abolishes movement. |
Microsphere binding assays with antibody blocking, time-lapse video microscopy, cytochalasin B actin disruption |
Journal of cell science |
High |
10462518
|
| 2000 |
Axonin-1 interaction with NrCAM at the floor plate mediates commissural axon guidance (turning) without promoting axon elongation; perturbation of NrCAM + NgCAM but not either alone is required for longitudinal post-crossing growth, indicating distinct guidance and growth signals. |
Stripe choice assays in vitro, antibody blocking, in vivo perturbation of commissural axon pathfinding in chick embryo |
The Journal of cell biology |
High |
10811834
|
| 2001 |
NrCAM null mice develop mature cataracts caused by disorganization of lens fibers accompanied by cytoskeletal abnormalities and disruption of connexin50-containing gap junctions; ankyrin-B null mice show an identical lens fiber disorganization, providing genetic evidence that NrCAM–ankyrin-B interaction is required to maintain lens fiber cell contact. |
NrCAM knockout mice, ankyrin-B mutant mice, histology, electron microscopy, immunostaining for connexin50 and cytoskeletal proteins |
The Journal of cell biology |
High |
11449000
|
| 2001 |
NrCAM and neurofascin function cooperatively at developing nodes of Ranvier: an NrCAM-Fc fusion protein specifically inhibits Na+ channel and ankyrinG accumulation at nodes in myelinating DRG–Schwann cell cocultures, and NrCAM-Fc clusters and co-precipitates neurofascin on axons, revealing that neurofascin plays a major role in node formation via interactions with NrCAM. |
Myelinating DRG–Schwann cell cocultures, NrCAM-Fc perturbation, immunofluorescence for Na+ channels and ankyrinG, co-immunoprecipitation of neurofascin by NrCAM-Fc |
Current biology : CB |
High |
11728309
|
| 2001 |
Nr-CAM-deficient cerebellar granule cells fail to extend neurites on contactin substrate in vitro, confirming contactin as an NrCAM ligand; mice doubly deficient for L1 and Nr-CAM exhibit severe cerebellar folial defects and reduced inner granule cell layer thickness not seen in either single mutant, indicating overlapping functions. |
NrCAM-null mouse neuronal culture, L1/NrCAM double-null mouse histology, antibody perturbation assays in cerebellar cultures |
The Journal of cell biology |
High |
11564762
|
| 2002 |
NrCAM is a direct transcriptional target of the β-catenin/LEF-1 pathway; LEF/TCF binding sites in the NrCAM promoter are required for its activation by β-catenin or plakoglobin; retroviral transduction of NrCAM stimulates cell growth, motility, and transformation, and anti-NrCAM antibodies inhibit melanoma cell motility. |
DNA microarray, promoter-reporter assays with LEF/TCF site mutations, retroviral transduction, nude mouse tumor assays, antibody blocking of motility |
Genes & development |
High |
12183361
|
| 2003 |
In the peripheral nervous system, NrCAM (ankyrinG-binding protein) accumulates at nascent node sites prior to Na+ channels; both Na+ channel and ankyrinG sequestration at developing nodes are delayed in NrCAM null mutants, and NrCAM action is local and linked to glial contact. Computational modeling supports lateral diffusion of Na+ channels with fast cytoskeletal anchoring by ankyrinG enabled by early NrCAM arrival. |
NrCAM null mouse PNS, immunofluorescence during remyelination, computational diffusion-clustering model |
The Journal of neuroscience |
High |
14602817
|
| 2004 |
NrCAM coupling to the retrograde actin flow in neuroblastoma growth cones requires both the FNIII domains (for cis-interactions) and lipid raft partitioning, but not the cytoplasmic tail alone; TAG-1 bead binding induces coalescence of lipid rafts and recruitment of caveolin-1 at the adhesive contact. |
Optical tweezers, single particle tracking of TAG-1 beads on NrCAM deletion mutants, cholesterol depletion (methyl-β-cyclodextrin), FRAP, immunostaining for caveolin-1 |
Molecular biology of the cell |
High |
15254265
|
| 2005 |
NrCAM is shed from the cell surface by metalloprotease-mediated ectodomain cleavage; the shed ectodomain and conditioned medium activate ERK and AKT signaling and enhance cell motility and proliferation. NrCAM forms a complex with α4β1 integrins in melanoma cells, indicating heterophilic adhesion with extracellular matrix receptors contributes to its oncogenic function. |
Conditioned medium experiments, NrCAM-Fc fusion protein treatment, co-immunoprecipitation with integrins, siRNA knockdown of NrCAM, NIH3T3 transformation assay |
Cancer research |
High |
16357171
|
| 2005 |
NrCAM promotes retinal ganglion cell (RGC) axon extension and correct pathfinding toward the optic fissure in the developing retina; NrCAM inhibition in organ-cultured eyes causes RGC axons to misroute at the optic fissure toward the opposite retinal side rather than entering the optic nerve head. |
Immunostaining of chick retina, substrate assays, stripe preference assays, time-lapse imaging of growth cones, antibody-blocking organ culture |
Development (Cambridge, England) |
High |
16033798
|
| 2006 |
NrCAM expressed on contralaterally-projecting retinal ganglion cells is critical for guidance of late-born RGCs through the optic chiasm; blocking NrCAM function increases the ipsilateral projection and reduces neurite outgrowth on chiasm cells in an age- and region-specific manner. EphB1/ephrin-B2-mediated repulsion and NrCAM-mediated attraction represent distinct molecular programs for binocular visual pathway formation. |
NrCAM null mice, anterograde axon tracing, in vitro neurite outgrowth on chiasm cells with antibody blocking |
Neuron |
High |
16701205
|
| 2006 |
The cytoplasmic C-terminus of NrCAM contains a PDZ-binding motif that specifically interacts with class I PDZ domains of the scaffold proteins SAP90/PSD-95 and SAP97; this interaction recruits SAP97 to the plasma membrane and is distinct from L1, CHL1, and neurofascin. |
Pull-down assays with cytoplasmic domain constructs, co-transfection of COS-7 cells, co-localization in photoreceptor terminals |
The European journal of neuroscience |
High |
16882004
|
| 2010 |
In the peripheral nervous system, glial NrCAM and gliomedin together act through axonal neurofascin 186 (NF186) to cluster Na+ channels at heminodes during early node of Ranvier formation; a second paranodal junction-dependent mechanism then concentrates Na+ channels at mature nodes by restricting their diffusion. |
NrCAM and gliomedin null mice, immunofluorescence during PNS myelination, electron microscopy |
Neuron |
High |
20188654
|
| 2011 |
NrCAM forms a molecular complex with neuropilin-2 (Npn-2) in brain and neurons, and is required for Sema3F-induced growth cone collapse in thalamic neurons; NrCAM deletion causes mistargeting of thalamocortical axons to visual cortex and disrupts visual acuity. |
NrCAM null mice, Npn-2 null mice, anterograde axon tracing, co-immunoprecipitation of NrCAM–Npn-2 complex, growth cone collapse assay in thalamic neuron cultures |
The Journal of neuroscience |
High |
21273439
|
| 2012 |
Sema6D and NrCAM are expressed on midline radial glia while Plexin-A1 and NrCAM are expressed on contralateral RGCs; NrCAM functions as a receptor for Sema6D, and a tripartite Sema6D/Nr-CAM/Plexin-A1 complex converts Sema6D repulsion to growth promotion, enabling RGC decussation at the optic chiasm. |
In situ hybridization and immunostaining of optic chiasm, RGC-specific perturbation, in vitro growth assays, receptor-ligand binding assays |
Neuron |
High |
22632726
|
| 2013 |
NrCAM contributes to mediolateral retinocollicular axon targeting; EphB2 tyrosine kinase phosphorylates NrCAM at a conserved tyrosine in the FIGQY ankyrin-binding motif, reducing ankyrin recruitment and modulating linkage of NrCAM to the actin cytoskeleton. Phospho-FIGQY levels of NrCAM in SC correlate with EphB activity in multiple mutant mouse backgrounds. |
EphB2 kinase phosphorylation assay, mutagenesis of FIGQY site, ankyrin recruitment in HEK293 cells, anterograde RGC axon tracing in NrCAM and EphB null mice, phospho-FIGQY immunostaining |
PloS one |
High |
24023801
|
| 2014 |
NrCAM localizes to dendritic spines of cortical pyramidal neurons and forms a complex with Sema3F receptor subunits Neuropilin-2 (Npn-2) and PlexinA3 (PlexA3) through an Npn-2-binding sequence (TARNER) in its extracellular Ig1 domain; NrCAM deletion elevates spine densities and increases mEPSC frequency, and re-expression of NrCAM rescues Sema3F-induced spine retraction. |
NrCAM null mice, co-immunoprecipitation, electron microscopy, whole-cell patch-clamp recordings, rescue experiments with NrCAM re-expression, trans-heterozygous genetic interaction test |
The Journal of neuroscience |
High |
25143608
|
| 2014 |
Long-term maintenance of Na+ channels at nodes of Ranvier requires continued axon-glial contact mediated by both gliomedin and NrCAM together; mice lacking both molecules show gradual loss of Na+ channels, NF186, ankyrinG, and βIV spectrin from nodes in an ordered sequence mirroring assembly, formation of binary nodes, and Schwann cell invasion of the nodal gap. |
Gliomedin/NrCAM double null mice, immunofluorescence time-course, electrophysiology (nerve conduction), electron microscopy |
The Journal of neuroscience |
High |
24719088
|
| 2019 |
NrCAM is a substrate of ADAM10; ADAM10 controls NrCAM surface levels and regulates neurite outgrowth in an NrCAM-dependent manner in vitro. Unlike APP, ADAM10 cleavage of NrCAM is not stimulated by the ADAM10 activator acitretin, demonstrating substrate-selective ADAM10 activation. |
ADAM10 activation/inhibition assays, NrCAM surface level measurement, neurite outgrowth assays, CSF proteomics from clinical trial samples |
EMBO molecular medicine |
High |
30833305
|
| 2019 |
NrCAM acts cell-autonomously in adolescent cortical pyramidal neurons to limit dendritic spine density; it promotes clustering of the Sema3F holoreceptor (Npn-2/PlexA3) by interfacing with Npn-2 and PDZ scaffold SAP102, thereby stimulating PlexA3 Rap-GAP activity, inhibiting Rap1-GTPase, and inactivating adhesive β1 integrins to drive Sema3F-induced spine pruning. |
Conditional inducible NrCAM knockout mice (Nex1Cre-ERT2:NrCAMflox/flox), molecular modeling, co-immunoprecipitation of holoreceptor complex, Rap1-GTPase and β1-integrin activity assays |
Cerebral cortex |
High |
29415226
|
| 2018 |
Neurocan (a chondroitin sulfate proteoglycan) inhibits Sema3F-induced spine elimination by physically associating with NrCAM; glycosaminoglycan chain interactions of neurocan are required for this inhibitory effect on the NrCAM/Npn-2/PlexA3 Sema3F holoreceptor complex. |
ELISA binding assays, COS-7 cell morphological retraction assay, antibody blocking, spine elimination assay in cortical neuron cultures, immunoelectron microscopy |
Frontiers in cellular neuroscience |
High |
30356641
|
| 2020 |
Alternative splicing of Nrcam exon 10 in dorsal root ganglia contributes to neuropathic pain; spinal nerve ligation increases exon 10 insertion (Nrcam+10 isoform), and antisense oligonucleotides targeting exon 10 that shift splicing toward the Nrcam-10 isoform attenuate mechanical allodynia, thermal hyperalgesia, and cold allodynia in mice. |
RNA-seq, antisense oligonucleotide splicing manipulation, DRG microinjection, intrathecal injection, behavioral pain assays (von Frey, Hargreaves, acetone) in mice |
The journal of pain |
High |
31917219
|
| 2025 |
NrCAM and Ankyrin B mediate perisomatic synaptic contact between cholecystokinin (CCK) basket interneurons and pyramidal neurons in mouse medial prefrontal cortex; NrCAM null mice show a significant decrease in CCK-BC (but not PV-BC) synaptic puncta on PN soma, and Ankyrin B deletion from PNs phenocopies this loss. |
NrCAM null mice, Ankyrin B conditional knockout (Nex1Cre-ERT2:Ank2flox/flox), VGLUT3/VGAT immunolabeling, CCK-BC reporter mouse (Sncg-tdT), NrCAM co-localization with Sncg+ CCK-BCs |
Current research in neurobiology |
High |
40276719
|
| 2025 |
A tumor-specific NrCAM proteoform lacking microexons 5 and 19 (Δex5Δex19 NRCAM) is uniformly expressed in pediatric high-grade gliomas; this proteoform (but not full-length NrCAM) is essential for pHGG cell migration and invasion in vitro and tumor growth in vivo, and a monoclonal antibody selective for Δex5Δex19 NrCAM enables T-cell-mediated tumor killing. |
Bulk and single-nuclei RNA-seq (short- and long-read), in vitro migration/invasion assays, in vivo tumor growth assays, monoclonal antibody development, FcRI-based universal immune receptor T-cell killing assay |
Cell reports |
High |
40782352
|
| 2023 |
Rbfox1 (an RNA-binding protein) regulates alternative splicing of NrCAM exon 10 in dorsal root ganglia; peripheral nerve injury downregulates Rbfox1, increasing L-Nrcam (exon 10-included) variants; restoring Rbfox1 reduces nociceptive hypersensitivity, while mimicking its downregulation induces neuropathic pain. |
Transcriptome profiling of DRG after SNL, bioinformatics, lentiviral Rbfox1 overexpression and knockdown, RT-PCR isoform quantification, behavioral pain assays |
Neurotherapeutics |
High |
38241164
|
| 2017 |
NrCAM activates MAPK/ERK and PI3K/AKT signaling pathways in thyroid cancer via ectodomain shedding and binding to EGFR and α4β1 integrins; in turn, these pathways drive NrCAM overexpression through the GSK3β/β-catenin axis, forming a positive feedback loop. |
NrCAM knockdown/overexpression in thyroid cancer cells, co-immunoprecipitation with EGFR and integrins, in vivo nude mouse xenografts, BrafV600E transgenic mice |
The Journal of clinical endocrinology and metabolism |
Medium |
27732334
|
| 2023 |
In hepatocellular carcinoma liver cancer stem cells, NrCAM activates EMT and metastasis-related MMPs through the MACF1-mediated β-catenin signaling pathway, facilitating intra-hepatic and lung metastasis. |
NrCAM inhibition in MYC-driven LCSC organoids, in vivo tumor allografts, scRNA-seq, co-immunoprecipitation/pathway analysis |
Journal of experimental & clinical cancer research |
Medium |
37993901
|
| 2021 |
Alternative splicing of Nrcam exon 10 regulates neurite outgrowth of DRG neurons; antisense oligonucleotides targeting exon 10 (shifting toward short Nrcam variants) suppress neurite length in multiple DRG neuron subtypes via activation of EGFR signaling. |
DRG primary culture, Nrcam ASO treatment, immunostaining with DRG subtype markers, EGFR activation assays |
Neuroreport |
Medium |
33850082
|
| 2022 |
NrCAM secreted by endometrial stromal cells increases progestin sensitivity of endometrial cancer cells by upregulating PRB through TET1-induced hydroxymethylation of the PRB gene promoter region. |
Co-culture experiments, NrCAM ELISA in conditioned medium, nude mouse xenografts with MPA±NrCAM, TET1 knockdown, bisulfite sequencing of PRB promoter hydroxymethylation |
Cancer gene therapy |
Medium |
35388173
|