| 2001 |
CRMP-2 is enriched in growing axons of cultured hippocampal neurons; overexpression induces supernumerary axons, and dominant-negative truncation mutants suppress primary axon formation, establishing CRMP-2 as critical for axon induction and neuronal polarity. |
Overexpression and dominant-negative mutant expression in cultured hippocampal neurons with morphological readout |
Nature neuroscience |
High |
11477421
|
| 2002 |
CRMP-2 binds tubulin heterodimers with higher affinity than assembled microtubules and promotes microtubule assembly; a deletion mutant lacking the microtubule-assembly region acts dominant-negatively to inhibit axonal growth and branching. |
In vitro tubulin-binding assays, microtubule polymerization assays, dominant-negative mutant overexpression in neurons |
Nature cell biology |
High |
12134159
|
| 2003 |
CRMP-2 interacts with Numb; CRMP-2/Numb complex co-localizes with L1 at axonal growth cones, and dominant-negative CRMP-2 or siRNA knockdown inhibits L1 endocytosis and suppresses axon growth, identifying CRMP-2 as a regulator of polarized Numb-mediated endocytosis. |
Co-immunoprecipitation, siRNA knockdown, dominant-negative expression, L1 endocytosis assay in hippocampal neurons |
Nature cell biology |
High |
12942088
|
| 2005 |
GSK-3β phosphorylates CRMP-2 at Thr-514 and inactivates it; expression of non-phosphorylatable CRMP-2 or GSK-3β inhibition induces multiple axon-like neurites, while constitutively active GSK-3β impairs neuronal polarization. NT-3 inactivates GSK-3β leading to CRMP-2 dephosphorylation and axon outgrowth. |
In vitro kinase assay, phospho-specific antibodies, overexpression of constitutively active/kinase-dead mutants, knockdown of CRMP-2 in hippocampal neurons |
Cell |
High |
15652488
|
| 2005 |
Cdk5 phosphorylates CRMP2 at Ser522; this primes sequential phosphorylation by GSK-3β at Thr509. Dual phosphorylation reduces CRMP2 affinity for tubulin and generates the 3F4 neurofibrillary tangle-associated epitope. Sema3A stimulation enhances this sequential phosphorylation, and CRMP2 Ala-mutants at Ser522 or Thr509 attenuate Sema3A-induced growth cone collapse. |
In vitro kinase assay, site-directed mutagenesis, phospho-specific antibodies, DRG growth cone collapse assay, cdk5-/- mouse brain lysates |
Genes to cells |
High |
15676027
|
| 2005 |
Rho kinase phosphorylates CRMP-2 and abolishes its binding to tubulin dimers, microtubules, and Numb, but not to actin. Phosphorylated CRMP-2 localizes exclusively to actin filaments rather than microtubules or clathrin-coated pits in growth cones. Ephrin-A5 induces this phosphorylation via Rho kinase during growth cone collapse. |
In vitro kinase assay, phospho-mimetic/null mutants, electron microscopy localization, growth cone collapse assay |
Molecular and cellular biology |
High |
16260611
|
| 2005 |
CRMP-2 C-terminal region directly binds the tetratricopeptide repeat domain of Kinesin light chain 1 (KLC1); soluble tubulin forms a trimeric complex with CRMP-2 and KLC1. Knockdown of KLCs or CRMP-2 impairs anterograde GFP-tubulin transport in axons. |
Pulldown/direct binding assay, Co-immunoprecipitation, fluorescence recovery after photobleaching (FRAP) of GFP-tubulin, siRNA knockdown |
Journal of neurochemistry |
High |
15935053
|
| 2000 |
CRMP-2 is highly phosphorylated at Thr-509, Ser-518, and Ser-522 in neurofibrillary tangles of Alzheimer's disease brain; site-directed mutagenesis showed that phosphorylation at all three sites is required for the 3F4 tangle-associated epitope. |
Immunoaffinity purification, site-directed mutagenesis, in vitro kinase assay with brain extract |
Biochemistry |
High |
10757975
|
| 2009 |
CRMP-2 directly binds dynein heavy chain at its N-terminus (distinct from the kinesin light chain-binding region); overexpression of dynein-binding CRMP-2 fragments prevents dynein-driven microtubule transport in COS-7 cells, suggesting CRMP-2 interferes with retrograde transport. |
Co-immunoprecipitation, direct binding domain mapping, dynein-driven microtubule transport assay in COS-7 cells |
Journal of neurochemistry |
Medium |
19659462
|
| 2009 |
CRMP-2 binds directly to CaV2.2 (N-type Ca2+ channel) at the domain I-II intracellular loop and distal C-terminus; CRMP-2 overexpression increases CaV2.2 surface expression and current density in hippocampal neurons and enhances vesicular glutamate release, while lentiviral knockdown abolishes this effect. |
Co-immunoprecipitation, cell-surface biotinylation, patch-clamp electrophysiology, glutamate release assay, lentiviral knockdown |
The Journal of biological chemistry |
High |
19755421
|
| 2009 |
CRMP-2 overexpression in dorsal root ganglion neurons increases CaV2.2 surface levels and current density; siRNA knockdown of CRMP-2 reduces CGRP release by ~54%, establishing CRMP-2 as a regulator of N-type Ca2+ channel activity and transmitter release in sensory neurons. |
Nucleofection overexpression, siRNA knockdown, patch-clamp electrophysiology, surface biotinylation, CGRP ELISA |
Journal of cell science |
High |
19903690
|
| 2011 |
Sema3A stimulation generates H2O2 via MICAL, oxidizing CRMP2 to form a disulfide-linked homodimer through Cys-504; oxidized CRMP2 then forms a transient disulfide complex with thioredoxin (TRX), which stimulates GSK-3-mediated phosphorylation of CRMP2, leading to growth cone collapse. This oxidation-phosphorylation cascade was reconstituted in vitro with purified proteins. |
In vitro reconstitution with purified proteins, mass spectrometry, non-reducing SDS-PAGE, mutagenesis (Cys-504), growth cone collapse assay |
Science signaling |
High |
21521879
|
| 2011 |
Inhibiting the CRMP-2–CaV2.2 interaction with a TAT-fused CRMP-2-derived peptide (TAT-CBD3) decreases neuropeptide release, excitatory synaptic transmission, and nocifensive/neuropathic pain behaviors in vivo, demonstrating that CRMP-2-mediated enhancement of CaV2.2 function underlies pain hypersensitivity. |
Peptide inhibitor (TAT-CBD3), in vivo pain behavior assays, electrophysiology in dorsal horn neurons |
Nature medicine |
High |
21642979
|
| 2011 |
TAT-CBD3 (CRMP-2 peptide) induces NR2B (GluN2B) internalization in dendritic spines, reduces NMDA-evoked Ca2+ influx and currents, and protects neurons from delayed calcium deregulation following glutamate excitotoxicity; CRMP-2 knockdown similarly blocks neuronal death, implicating CRMP-2 in NMDAR surface trafficking. |
Lentiviral CRMP-2 knockdown, peptide application, Ca2+ imaging, patch-clamp electrophysiology, cortical impact TBI model in vivo |
The Journal of biological chemistry |
High |
21832084
|
| 2012 |
CRMP-2 phosphorylation at Thr555 (by Rho kinase downstream of NgR1) is increased in degenerating axons in EAE/multiple sclerosis; AAV-mediated expression of phospho-resistant T555A-CRMP-2 limits optic nerve axonal degeneration, establishing NgR1-dependent CRMP-2 phosphorylation as a mechanism of axonal degeneration. |
NgR1 knockout mice, AAV-T555A-CRMP2 transduction, phospho-specific immunostaining, axonal degeneration quantification |
Brain |
High |
22544872
|
| 2012 |
Cdk5-mediated phosphorylation of CRMP-2 at Ser522 is required for dendritic field organization in vivo; CRMP2 S522A knock-in mice combined with CRMP1 knockout display severe 'curling' dendritic patterning in cortical neurons, demonstrating synergistic roles of CRMP1 and CRMP2 phosphorylation in dendritic projection. |
Knock-in mouse generation (CRMP2-S522A), CRMP1 knockout mice, cortical neuron morphology analysis |
The Journal of neuroscience |
High |
22279220
|
| 2012 |
CRMP-2 phosphorylation by Cdk5 at Ser522 enhances its interaction with CaV2.2; a Cdk5 phospho-null CRMP-2-S522A mutant or inactive Cdk5 abolishes CRMP-2-mediated enhancement of Ca2+ influx via CaV2.2, whereas the Rho kinase site T555A mutant is ineffective. |
Phospho-null mutant overexpression, inactive Cdk5 co-expression, Ca2+ current measurement, co-immunoprecipitation |
FEBS letters |
Medium |
23022559
|
| 2013 |
CRMP-2 is SUMOylated by Ubc9 at Lys374 in vivo; removal of the SUMOylation site (K374A or K374A/M375A/D376A mutants) reduces NaV1.7 surface expression and current density, while increasing SUMOylation levels inversely correlates with CaV2.2-mediated calcium influx. |
In vivo SUMOylation assay, SUMO protease overexpression, surface biotinylation, electrophysiology (NaV1.7 and CaV2.2 currents), calcium imaging |
The Journal of biological chemistry / Channels |
High |
23510938 23836888
|
| 2013 |
CRMP-2 interacts with the GluK5 subunit of kainate receptors; PKC-mediated phosphorylation of CRMP-2 at T555 (via non-canonical KAR signaling) downregulates membrane CaV2.2, while dephosphorylation at T514 (via GSK3β phosphorylation at S9) promotes neurite outgrowth. |
Co-immunoprecipitation, phospho-specific antibodies, CaV2.2 surface expression assay, neurite outgrowth assay in DRG neurons |
The Journal of neuroscience |
Medium |
24227739
|
| 2013 |
CRMP-2 interacts with NMDAR (co-immunoprecipitation) and NCX3 but not NCX1; TAT-CBD3 peptide disrupts CRMP-2–NMDAR interaction without altering NMDAR localization, and simultaneously augments CRMP-2–NCX3 interaction and triggers NCX3 internalization, inhibiting both reverse and forward NCX modes. |
Co-immunoprecipitation, siRNA knockdown, NCX3 internalization assay, Ca2+ dysregulation assay |
The Journal of biological chemistry |
Medium |
24474686
|
| 2008 |
Dephosphorylation of CRMP2 at GSK3-targeted residues (Ser-518/Thr-514/Thr-509) is carried out by a protein phosphatase 1 family member in vitro and in neurons; the Cdk5-phosphorylated site (Ser-522) is comparatively resistant to phosphatase treatment, partly due to neighboring basic residues, which may contribute to Alzheimer's disease-associated CRMP2 hyperphosphorylation. |
In vitro phosphatase assay, pharmacological inhibition (purvalanol, CT99021, IGF-1), Pin1 transgenic mice |
The Journal of biological chemistry |
High |
18460467
|
| 2009 |
Local mTOR-p70S6K signaling in the axon selectively upregulates translation of CRMP2 and Tau mRNAs via 5'-terminal oligopyrimidine tract elements; rapamycin suppresses axon specification by reducing CRMP2/Tau translation, and exogenous CRMP2 rescues axon formation in rapamycin-treated neurons. |
Rapamycin treatment, constitutively active p70S6K expression, 5'UTR reporter assays, local translation in axons |
The Journal of biological chemistry |
Medium |
19648118
|
| 2010 |
CRMP-2 interacts with MICAL-L1 in non-neuronal cells; CRMP-2 depletion causes relocalization of internalized transferrin from peripheral vesicles to the endocytic recycling compartment, an effect blocked by inhibiting dynein (dynamitin overexpression), establishing CRMP-2 as a link between MICAL-L1/EHD1 vesicular transport and dynein motors. |
Co-immunoprecipitation, siRNA knockdown, transferrin recycling assay, dynamitin overexpression |
The Journal of biological chemistry |
Medium |
20801876
|
| 2010 |
BMP-SMAD1/4 signaling transcriptionally suppresses CRMP2 expression by binding the CRMP2 promoter (ChIP); CRMP2 knockdown or dominant-negative CRMP2 in utero causes accumulation of multipolar cells and impairs multipolar-to-bipolar transition during radial neuronal migration. |
ChIP assay, in utero electroporation with RNAi and dominant-negative constructs, cortical slice analysis |
The Journal of biological chemistry |
High |
20926379
|
| 2015 |
A membrane-tethered myristoylated CRMP-2 peptide (myr-tat-CBD3) more efficiently disrupts CRMP-2–CaV2.2 interaction than the non-myristoylated version, reduces CaV2.2 trafficking, inhibits Ca2+ influx, decreases DRG neuron excitability, and reverses carrageenan-induced thermal hypersensitivity and postoperative pain. |
Pulldown, confocal immunofluorescence colocalization, voltage-clamp electrophysiology, current-clamp, in vivo pain behavior assays |
Pain |
High |
25782368
|
| 2016 |
CRMP2 SUMOylation at Lys374 is enhanced by Cdk5-mediated phosphorylation and antagonized by Fyn phosphorylation; SUMOylated CRMP2 binds NaV1.7 to maintain its membrane localization; loss of SUMOylation triggers clathrin-dependent NaV1.7 internalization involving Nedd4-2, Numb, and Eps15. |
SUMOylation assays, phospho-mutant constructs (Cdk5/Fyn sites), surface biotinylation, clathrin inhibition, Co-immunoprecipitation, CRMP2-K374A mutant expression |
Proceedings of the National Academy of Sciences |
High |
27940916
|
| 2016 |
Brain-specific Crmp2 knockout mice show reduced hippocampal LTP, abnormal NMDA receptor composition, aberrant dendrite development, and defective synapse formation in CA1 neurons; adult neurogenesis knockdown shows stage-dependent developmental defects, demonstrating CRMP2 is required for synaptic plasticity and neuronal development in vivo. |
Conditional knockout mice, electrophysiology (LTP), immunostaining, western blot for NMDAR subunits, retroviral knockdown in adult neurogenesis |
Nature communications |
High |
27249678
|
| 2017 |
X-ray crystal structure (1.78 Å) of mouse CRMP2 reveals Lys374 as the sole biologically relevant SUMOylation site, buried in the tetramer interface but exposed in the monomer; structural basis suggests phosphorylation-induced monomerization exposes Lys374 for SUMOylation. |
X-ray crystallography (1.78 Å resolution), sequence alignment, structure-function mutagenesis |
Channels |
High |
28277940
|
| 2017 |
X-ray structural analysis of CRMP2-tubulin interaction shows the C-terminal helix H19 of CRMP2 is the main interface with soluble tubulin dimers (distinct from tail-mediated interaction with assembled microtubules); H19-mediated interaction promotes rapid GTP-state microtubule formation; H19 mutants disturb axon elongation in chick neurons and fail to produce axonal microtubule features in C. elegans. |
X-ray crystallography, in vitro microtubule polymerization assay, H19 mutagenesis, chick neuron axon elongation assay, C. elegans genetic assay |
Scientific reports |
High |
28878401
|
| 2018 |
FER tyrosine kinase phosphorylates CRMP2 at Y479 and Y499; crystal structure of CRMP2-Y479E phospho-mimetic reveals this prevents CRMP2 tetramerization, abolishing microtubule bundling activity of the C-terminus. FER depletion increases paclitaxel-induced microtubule stability and cytotoxicity in ovarian cancer cells. |
X-ray crystallography (CRMP2-Y479E), in vitro microtubule bundling assay, FER kinase inhibition, in vivo xenograft model |
Nature communications |
High |
29396402
|
| 2018 |
Cdk5-mediated CRMP2 phosphorylation (at Ser522) is increased presynaptically in spinal cord/DRG after spared nerve injury; CRMP2 knockdown reverses mechanical allodynia; intrathecal non-phosphorylatable CRMP2-S522A decreases allodynia while phospho-mimetic S522D induces allodynia in naive rats, establishing Cdk5-CRMP2 phosphorylation as both necessary and sufficient for neuropathic pain. |
siRNA knockdown, intrathecal expression of phospho-null/mimetic mutants, biochemical fractionation, spared nerve injury model |
Neurobiology of pain |
High |
31080913
|
| 2018 |
Neurofibromin binds CRMP2 in a CDK5-dependent manner; loss of neurofibromin frees CRMP2 to interact with syntaxin 1A and CaV2.2, increasing CGRP release; a CRMP2-neurofibromin interface-disrupting peptide (t-CNRP1) inhibits Ca2+ influx, reduces CaV2.2 membrane localization, and reverses pain behaviors in NF1-related models. |
Co-immunoprecipitation, peptide mapping, CGRP release assay, surface biotinylation, in vivo pain behavior |
Pain |
High |
28767512
|
| 2018 |
The Ubc9–CRMP2 interaction has low micromolar affinity (measured by microscale thermophoresis and AlphaLISA); a CRMP2 SUMOylation motif heptamer peptide (t-CSM) disrupts CRMP2–Ubc9 interaction, reduces CRMP2 SUMOylation, blocks NaV1.7 surface trafficking in sensory neurons, and reverses spinal nerve injury-induced pain. |
Microscale thermophoresis, AlphaLISA, cell-penetrating peptide, surface biotinylation, electrophysiology, SNI pain model |
Pain |
High |
29847471
|
| 2019 |
PTEN knockout abrogates GSK3 inhibitory activity on CRMP2; maintaining GSK3 activity (Gsk3 knock-in mice) compromises PTEN-KO-mediated optic nerve regeneration and CRMP2 activity; viral expression of constitutively active CRMP2-T/A rescues regeneration despite reduced mTOR activation, establishing GSK3/CRMP2 as a required pathway for PTEN-KO-mediated axon regeneration. |
Conditional knockout mice (PTEN), GSK3 knock-in mice, AAV-CRMP2-T/A viral expression, optic nerve regeneration assay |
Communications biology |
High |
31453382
|
| 2019 |
Nogo-A induces association of NgR1 with CRMP2 in a PlexinA2-dependent manner; NgR1 and PlexinA2 interact genetically to restrict corticospinal axon sprouting after pyramidotomy; double-heterozygous NgR1+/-;PlexinA2+/- mice show greater sprouting and functional recovery, placing CRMP2 in a NgR1/PlexinA2/CRMP2 ternary complex that limits neural repair. |
Immunoprecipitation proteomics, non-neuronal cell contraction assay, double-heterozygous mouse genetics, pyramidotomy model |
The Journal of neuroscience |
High |
30804090
|
| 2013 |
Identification of a reversible intermolecular Cys-504–Cys-504 dithiol-disulfide switch in homotetrameric CRMP2 that determines two quaternary conformations controlling axonal outgrowth; this switch is regulated by cytosolic glutaredoxin 2c (Grx2c). |
Non-reducing SDS-PAGE, site-directed mutagenesis (Cys-504), neuronal axon outgrowth assay, Grx2c interaction studies |
The Journal of biological chemistry |
Medium |
24133216
|
| 2008 |
Neurofibromin co-immunoprecipitates with CRMP-2 and CRMP-4 (but not CRMP-1) from rat brain; CDK5 activity is required for the neurofibromin–CRMP-2 interaction. |
Immunoprecipitation from rat brain lysates, CDK5 inhibition (roscovitine), mass spectrometry |
Biochemical and biophysical research communications |
Medium |
18313395
|
| 2020 |
CRMP2 mediates Sema3F signaling; crmp2-/- mice display prominent defects in stereotyped axon pruning in hippocampus and visual cortex and altered dendritic spine remodeling, consistent with impaired Sema3F (not only Sema3A) signaling; crmp2-/- mice show ASD-related social behavior changes. |
crmp2-/- knockout mice, axon pruning quantification in hippocampus/visual cortex, Sema3F stimulation in primary neurons, behavioral assays |
EMBO reports |
High |
31919978
|
| 2020 |
CRMP2 K374A knock-in (CRMP2-SUMOylation-null) mice show reduced NaV1.7 membrane localization and currents specifically in female sensory neurons; these mice fail to develop persistent mechanical allodynia in a neuropathic pain model, demonstrating sex-specific SUMOylation-dependent control of peripheral NaV1.7. |
CRMP2-K374A knock-in mice, surface biotinylation, electrophysiology, behavioral pain assays, sex-stratified analysis |
Pain |
High |
32569093
|
| 2021 |
Non-SUMOylated CRMP2 forms a complex with Numb, Nedd4-2, and Eps15 to drive clathrin-mediated endocytosis of NaV1.7; silencing Numb, Nedd4-2, or Eps15 in DRG neurons from CRMP2-K374A female mice restores sodium currents; clathrin inhibition in nerve-injured male CRMP2-K374A mice precipitates allodynia. |
siRNA knockdown of endocytic proteins, clathrin assembly inhibitor, electrophysiology, CRMP2-K374A knock-in mice |
Molecular brain |
High |
33478555
|
| 2018 |
TGF-β/Smad canonical signaling suppresses CRMP2 expression through a Smad–TGIF transcriptional repressor complex; this inhibits neurite elongation in mouse and human iPSC-derived neurons; TGF-β pathway mutations found in neurodevelopmental disorder patients disrupt neuronal morphogenesis via this Smad/TGIF/CRMP2 axis. |
ChIP, co-immunoprecipitation (Smad-TGIF complex), in utero electroporation, human iPSC-derived neuron assays |
The Journal of neuroscience |
High |
29695415
|
| 2023 |
CRMP2 (DPYSL2) acts as a synaptic m6A reader: it binds m6A-modified Malat1 lncRNA at synapses in the mPFC; disruption of m6A on Malat1 reduces CRMP2 interaction and decreases dendritic spine formation, impairing fear-extinction memory consolidation. |
m6A RNA-sequencing, RNA immunoprecipitation/mass spectrometry, dendritic spine quantification, fear-extinction behavioral assay |
The Journal of neuroscience |
Medium |
37669863
|
| 2019 |
PTP4A3 (PRL-3) phosphatase dephosphorylates CRMP2 at T514 in uveal melanoma cells; loss of CRMP2 expression in PTP4A3-expressing cells increases cell migration and invasiveness in vitro/in vivo, accompanied by actin cytoskeleton reorganization and increased cell stiffness; catalytically inactive PTP4A3 does not produce these effects. |
Phospho-specific immunoblot, PTP4A3 active-site mutant, CRMP2 knockdown, invasion/migration assays, in vivo xenograft |
Scientific reports |
Medium |
30816227
|