Ntrk1 neurotrophic tyrosine kinase, receptor, type 1 [Mus musculus (house mouse)] - Gene

Summary

Official Symbol: Ntrk1provided by MGI
Official Full Name: neurotrophic tyrosine kinase, receptor, type 1provided by MGI
Primary source: MGI:MGI:97383
See related: Ensembl:ENSMUSG00000028072 AllianceGenome:MGI:97383
Gene type: protein coding
RefSeq status: VALIDATED
Organism: Mus musculus
Lineage: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Glires; Rodentia; Myomorpha; Muroidea; Muridae; Murinae; Mus; Mus
Also known as: Tkr; trk; TrkA
Summary: Predicted to enable several functions, including GPI-linked ephrin receptor activity; nerve growth factor binding activity; and nerve growth factor receptor activity. Involved in circadian rhythm; negative regulation of neuron apoptotic process; and nervous system development. Acts upstream of or within several processes, including behavioral response to formalin induced pain; nerve growth factor signaling pathway; and nervous system development. Located in axon; cell surface; and endosome. Part of protein-containing complex. Is expressed in several structures, including branchial arch; nervous system; reproductive system; sensory organ; and trunk. Used to study hereditary sensory neuropathy. Human ortholog(s) of this gene implicated in Alzheimer's disease; hereditary sensory neuropathy; hereditary sensory neuropathy type 4; and schizophrenia. Orthologous to human NTRK1 (neurotrophic receptor tyrosine kinase 1). [provided by Alliance of Genome Resources, Mar 2025]
Expression: Biased expression in adrenal adult (RPKM 7.1), CNS E14 (RPKM 2.8) and 13 other tissues See more
Orthologs: human all
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Genomic context

Location:: 3 F1; 3 38.62 cM

Exon count:: 18

Annotation release	Status	Assembly	Chr	Location
RS_2024_02	current	GRCm39 (GCF_000001635.27)	3	NC_000069.7 (87685551..87702549, complement)
108.20200622	previous assembly	GRCm38.p6 (GCF_000001635.26)	3	NC_000069.6 (87778244..87795242, complement)

Chromosome 3 - NC_000069.7 Genomic Context describing neighboring genes

Genomic regions, transcripts, and products

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Go to reference sequence details

Genomic Sequence:

Go to nucleotide: Graphics FASTA GenBank

Expression

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See details

Project title: Mouse ENCODE transcriptome data
Description: RNA profiling data sets generated by the Mouse ENCODE project.
BioProject: PRJNA66167
Publication: PMID 25409824
Analysis date: n/a

Bibliography

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GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Nerve Growth Factor/Tyrosine Kinase A Receptor Pathway Enhances Analgesia in an Experimental Mouse Model of Bone Cancer Pain by Increasing Membrane Levels of delta-Opioid Receptors.
Title: Nerve Growth Factor/Tyrosine Kinase A Receptor Pathway Enhances Analgesia in an Experimental Mouse Model of Bone Cancer Pain by Increasing Membrane Levels of δ-Opioid Receptors.
TrkA-mediated sensory innervation of injured mouse tendon supports tendon sheath progenitor cell expansion and tendon repair.
Title: TrkA-mediated sensory innervation of injured mouse tendon supports tendon sheath progenitor cell expansion and tendon repair.
Extracellular vesicles derived from mouse adipose-derived mesenchymal stem cells promote diabetic corneal epithelial wound healing through NGF/TrkA pathway activation involving dendritic cells.
Title: Extracellular vesicles derived from mouse adipose-derived mesenchymal stem cells promote diabetic corneal epithelial wound healing through NGF/TrkA pathway activation involving dendritic cells.
NGF/TrkA promotes the vitality, migration and adhesion of bone marrow stromal cells in hypoxia by regulating the Nrf2 pathway.
Title: NGF/TrkA promotes the vitality, migration and adhesion of bone marrow stromal cells in hypoxia by regulating the Nrf2 pathway.
Tyrosine kinase type A-specific signalling pathways are critical for mechanical allodynia development and bone alterations in a mouse model of rheumatoid arthritis.
Title: Tyrosine kinase type A-specific signalling pathways are critical for mechanical allodynia development and bone alterations in a mouse model of rheumatoid arthritis.
Involvement of neuronal and muscular Trk-fused gene (TFG) defects in the development of neurodegenerative diseases.
Title: Involvement of neuronal and muscular Trk-fused gene (TFG) defects in the development of neurodegenerative diseases.
Modulation of calcium signaling depends on the oligosaccharide of GM1 in Neuro2a mouse neuroblastoma cells.
Title: Modulation of calcium signaling depends on the oligosaccharide of GM1 in Neuro2a mouse neuroblastoma cells.
Ntrk1 mutation co-segregating with bipolar disorder and inherited kidney disease in a multiplex family causes defects in neuronal growth and depression-like behavior in mice.
Title: Ntrk1 mutation co-segregating with bipolar disorder and inherited kidney disease in a multiplex family causes defects in neuronal growth and depression-like behavior in mice.
Spatio-temporal expression profile of NGF and the two-receptor system, TrkA and p75NTR, in experimental autoimmune encephalomyelitis.
Title: Spatio-temporal expression profile of NGF and the two-receptor system, TrkA and p75NTR, in experimental autoimmune encephalomyelitis.
this study shows regulation of eosinophil recruitment and allergic airwayiInflammation by Tropomyosin Receptor Kinase A
Title: Regulation of Eosinophil Recruitment and Allergic Airway Inflammation by Tropomyosin Receptor Kinase A.

Submit: New GeneRIF Correction See all GeneRIFs (94)

Variation

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Alleles

Alleles of this type are documented at Mouse Genome Informatics (MGI)

Endonuclease-mediated (10) 1 citation
Targeted (18) 1 citation

Interactions

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Products	Interactant	Other Gene	Complex	Source	Pubs	Description

General gene information

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Markers

RH126965 (e-PCR)
- UniSTS:207521

Ntrk1 (e-PCR), detects polymorphism
- UniSTS:144071

Ntrk1 (e-PCR), detects polymorphism
- UniSTS:525563

Gene Ontology Provided by MGI

Function	Evidence Code	Pubs
enables ATP binding	IEA Inferred from Electronic Annotation more info
enables GPI-linked ephrin receptor activity	IEA Inferred from Electronic Annotation more info
enables GPI-linked ephrin receptor activity	ISO Inferred from Sequence Orthology more info
enables boss receptor activity	IEA Inferred from Electronic Annotation more info
enables brain-derived neurotrophic factor receptor activity	IEA Inferred from Electronic Annotation more info
enables epidermal growth factor receptor activity	IEA Inferred from Electronic Annotation more info
enables fibroblast growth factor receptor activity	IEA Inferred from Electronic Annotation more info
enables hepatocyte growth factor receptor activity	IEA Inferred from Electronic Annotation more info
enables identical protein binding	ISO Inferred from Sequence Orthology more info
enables insulin receptor activity	IEA Inferred from Electronic Annotation more info
enables insulin-like growth factor receptor activity	IEA Inferred from Electronic Annotation more info
enables kinase binding	IEA Inferred from Electronic Annotation more info
enables kinase binding	ISO Inferred from Sequence Orthology more info
enables macrophage colony-stimulating factor receptor activity	IEA Inferred from Electronic Annotation more info
enables nerve growth factor binding	ISO Inferred from Sequence Orthology more info
enables nerve growth factor binding	ISS Inferred from Sequence or Structural Similarity more info
enables nerve growth factor receptor activity	ISO Inferred from Sequence Orthology more info
enables nerve growth factor receptor activity	ISS Inferred from Sequence or Structural Similarity more info
enables neurotrophin binding	IBA Inferred from Biological aspect of Ancestor more info
enables neurotrophin p75 receptor binding	IEA Inferred from Electronic Annotation more info
enables neurotrophin p75 receptor binding	ISO Inferred from Sequence Orthology more info
enables neurotrophin receptor activity	IBA Inferred from Biological aspect of Ancestor more info
enables placental growth factor receptor activity	IEA Inferred from Electronic Annotation more info
enables platelet-derived growth factor alpha-receptor activity	IEA Inferred from Electronic Annotation more info
enables platelet-derived growth factor beta-receptor activity	IEA Inferred from Electronic Annotation more info
enables protein binding	IPI Inferred from Physical Interaction more info	PubMed
enables protein homodimerization activity	ISO Inferred from Sequence Orthology more info
enables protein homodimerization activity	ISS Inferred from Sequence or Structural Similarity more info
enables protein tyrosine kinase activity	ISO Inferred from Sequence Orthology more info	PubMed
enables protein tyrosine kinase collagen receptor activity	IEA Inferred from Electronic Annotation more info
enables stem cell factor receptor activity	IEA Inferred from Electronic Annotation more info
enables transmembrane receptor protein tyrosine kinase activity	IBA Inferred from Biological aspect of Ancestor more info
enables transmembrane receptor protein tyrosine kinase activity	ISO Inferred from Sequence Orthology more info	PubMed
enables transmembrane receptor protein tyrosine kinase activity	ISS Inferred from Sequence or Structural Similarity more info
enables transmembrane-ephrin receptor activity	IEA Inferred from Electronic Annotation more info
enables vascular endothelial growth factor receptor activity	IEA Inferred from Electronic Annotation more info

Process	Evidence Code	Pubs
acts_upstream_of_or_within B cell differentiation	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in Kit signaling pathway	IEA Inferred from Electronic Annotation more info
involved_in Sertoli cell development	IEA Inferred from Electronic Annotation more info
involved_in Sertoli cell development	ISO Inferred from Sequence Orthology more info
involved_in axon guidance	IEA Inferred from Electronic Annotation more info
involved_in axon guidance	ISO Inferred from Sequence Orthology more info
involved_in axonogenesis involved in innervation	IMP Inferred from Mutant Phenotype more info	PubMed
acts_upstream_of_or_within behavioral response to formalin induced pain	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in brain-derived neurotrophic factor receptor signaling pathway	IEA Inferred from Electronic Annotation more info
involved_in cell surface receptor protein tyrosine kinase signaling pathway	IBA Inferred from Biological aspect of Ancestor more info
acts_upstream_of_or_within cellular response to growth factor stimulus	ISO Inferred from Sequence Orthology more info	PubMed
involved_in cellular response to nerve growth factor stimulus	IBA Inferred from Biological aspect of Ancestor more info
acts_upstream_of_or_within cellular response to nerve growth factor stimulus	IDA Inferred from Direct Assay more info	PubMed
involved_in cellular response to nerve growth factor stimulus	ISO Inferred from Sequence Orthology more info
involved_in cellular response to nerve growth factor stimulus	ISS Inferred from Sequence or Structural Similarity more info
involved_in cellular response to nicotine	IEA Inferred from Electronic Annotation more info
involved_in cellular response to nicotine	ISO Inferred from Sequence Orthology more info
involved_in circadian rhythm	IEP Inferred from Expression Pattern more info	PubMed
involved_in collagen-activated tyrosine kinase receptor signaling pathway	IEA Inferred from Electronic Annotation more info
involved_in detection of mechanical stimulus involved in sensory perception of pain	IEA Inferred from Electronic Annotation more info
involved_in detection of mechanical stimulus involved in sensory perception of pain	ISO Inferred from Sequence Orthology more info
involved_in detection of temperature stimulus involved in sensory perception of pain	IEA Inferred from Electronic Annotation more info
involved_in detection of temperature stimulus involved in sensory perception of pain	ISO Inferred from Sequence Orthology more info
involved_in ephrin receptor signaling pathway	IEA Inferred from Electronic Annotation more info
involved_in epidermal growth factor receptor signaling pathway	IEA Inferred from Electronic Annotation more info
involved_in fibroblast growth factor receptor signaling pathway	IEA Inferred from Electronic Annotation more info
involved_in hepatocyte growth factor receptor signaling pathway	IEA Inferred from Electronic Annotation more info
acts_upstream_of_or_within innervation	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in insulin receptor signaling pathway	IEA Inferred from Electronic Annotation more info
involved_in insulin-like growth factor receptor signaling pathway	IEA Inferred from Electronic Annotation more info
involved_in learning or memory	IEA Inferred from Electronic Annotation more info
involved_in learning or memory	ISO Inferred from Sequence Orthology more info
involved_in macrophage colony-stimulating factor signaling pathway	IEA Inferred from Electronic Annotation more info
acts_upstream_of_or_within mechanoreceptor differentiation	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in negative regulation of cell population proliferation	ISO Inferred from Sequence Orthology more info
involved_in negative regulation of cell population proliferation	ISS Inferred from Sequence or Structural Similarity more info
acts_upstream_of_or_within negative regulation of neuron apoptotic process	IGI Inferred from Genetic Interaction more info	PubMed
involved_in negative regulation of neuron apoptotic process	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in negative regulation of neuron apoptotic process	ISO Inferred from Sequence Orthology more info
involved_in nerve growth factor signaling pathway	IBA Inferred from Biological aspect of Ancestor more info
acts_upstream_of_or_within nerve growth factor signaling pathway	IDA Inferred from Direct Assay more info	PubMed
acts_upstream_of_or_within nerve growth factor signaling pathway	IGI Inferred from Genetic Interaction more info	PubMed
involved_in nerve growth factor signaling pathway	ISO Inferred from Sequence Orthology more info
involved_in nerve growth factor signaling pathway	ISS Inferred from Sequence or Structural Similarity more info
acts_upstream_of_or_within nervous system development	IDA Inferred from Direct Assay more info	PubMed
acts_upstream_of neuron apoptotic process	IGI Inferred from Genetic Interaction more info	PubMed
acts_upstream_of_or_within neuron development	ISO Inferred from Sequence Orthology more info	PubMed
acts_upstream_of_or_within neuron projection development	ISO Inferred from Sequence Orthology more info	PubMed
involved_in neurotrophin TRK receptor signaling pathway	ISO Inferred from Sequence Orthology more info
involved_in neurotrophin TRK receptor signaling pathway	ISS Inferred from Sequence or Structural Similarity more info
involved_in olfactory nerve development	IEA Inferred from Electronic Annotation more info
acts_upstream_of_or_within peptidyl-tyrosine autophosphorylation	ISO Inferred from Sequence Orthology more info	PubMed
involved_in peptidyl-tyrosine autophosphorylation	ISO Inferred from Sequence Orthology more info
involved_in peptidyl-tyrosine autophosphorylation	ISS Inferred from Sequence or Structural Similarity more info
involved_in peptidyl-tyrosine phosphorylation	ISO Inferred from Sequence Orthology more info
involved_in peptidyl-tyrosine phosphorylation	ISS Inferred from Sequence or Structural Similarity more info
involved_in platelet-derived growth factor receptor-alpha signaling pathway	IEA Inferred from Electronic Annotation more info
involved_in platelet-derived growth factor receptor-beta signaling pathway	IEA Inferred from Electronic Annotation more info
involved_in positive regulation of ERK1 and ERK2 cascade	ISO Inferred from Sequence Orthology more info
involved_in positive regulation of ERK1 and ERK2 cascade	ISS Inferred from Sequence or Structural Similarity more info
involved_in positive regulation of GTPase activity	ISO Inferred from Sequence Orthology more info
involved_in positive regulation of GTPase activity	ISS Inferred from Sequence or Structural Similarity more info
involved_in positive regulation of NF-kappaB transcription factor activity	ISO Inferred from Sequence Orthology more info
involved_in positive regulation of NF-kappaB transcription factor activity	ISS Inferred from Sequence or Structural Similarity more info
involved_in positive regulation of Ras protein signal transduction	ISO Inferred from Sequence Orthology more info
involved_in positive regulation of Ras protein signal transduction	ISS Inferred from Sequence or Structural Similarity more info
involved_in positive regulation of angiogenesis	ISO Inferred from Sequence Orthology more info
involved_in positive regulation of neuron projection development	IBA Inferred from Biological aspect of Ancestor more info
involved_in positive regulation of neuron projection development	ISO Inferred from Sequence Orthology more info
involved_in positive regulation of neuron projection development	ISS Inferred from Sequence or Structural Similarity more info
involved_in positive regulation of phosphatidylinositol 3-kinase/protein kinase B signal transduction	IBA Inferred from Biological aspect of Ancestor more info
involved_in positive regulation of programmed cell death	ISO Inferred from Sequence Orthology more info
involved_in positive regulation of programmed cell death	ISS Inferred from Sequence or Structural Similarity more info
involved_in positive regulation of protein phosphorylation	ISO Inferred from Sequence Orthology more info
acts_upstream_of_or_within positive regulation of synapse assembly	IDA Inferred from Direct Assay more info	PubMed
involved_in positive regulation of synaptic transmission, glutamatergic	IEA Inferred from Electronic Annotation more info
involved_in positive regulation of synaptic transmission, glutamatergic	ISO Inferred from Sequence Orthology more info
involved_in programmed cell death involved in cell development	ISO Inferred from Sequence Orthology more info
involved_in programmed cell death involved in cell development	ISS Inferred from Sequence or Structural Similarity more info
acts_upstream_of_or_within protein autophosphorylation	ISO Inferred from Sequence Orthology more info	PubMed
involved_in protein autophosphorylation	ISO Inferred from Sequence Orthology more info
involved_in protein autophosphorylation	ISS Inferred from Sequence or Structural Similarity more info
acts_upstream_of_or_within protein phosphorylation	IDA Inferred from Direct Assay more info	PubMed
involved_in protein phosphorylation	ISO Inferred from Sequence Orthology more info
involved_in response to activity	ISO Inferred from Sequence Orthology more info
involved_in response to axon injury	IEA Inferred from Electronic Annotation more info
involved_in response to electrical stimulus	IEA Inferred from Electronic Annotation more info
involved_in response to electrical stimulus	ISO Inferred from Sequence Orthology more info
involved_in response to hydrostatic pressure	IEA Inferred from Electronic Annotation more info
involved_in response to nicotine	ISO Inferred from Sequence Orthology more info
involved_in response to nutrient levels	IEA Inferred from Electronic Annotation more info
involved_in response to nutrient levels	ISO Inferred from Sequence Orthology more info
involved_in response to xenobiotic stimulus	IEA Inferred from Electronic Annotation more info
involved_in response to xenobiotic stimulus	ISO Inferred from Sequence Orthology more info
involved_in spermatogenesis	IEA Inferred from Electronic Annotation more info
involved_in sympathetic nervous system development	IMP Inferred from Mutant Phenotype more info	PubMed
involved_in vascular endothelial growth factor receptor-1 signaling pathway	IEA Inferred from Electronic Annotation more info
involved_in vascular endothelial growth factor signaling pathway	IEA Inferred from Electronic Annotation more info

Component	Evidence Code	Pubs
is_active_in axon	IBA Inferred from Biological aspect of Ancestor more info
located_in axon	IDA Inferred from Direct Assay more info	PubMed
located_in axon	ISO Inferred from Sequence Orthology more info
located_in cell surface	IDA Inferred from Direct Assay more info	PubMed
located_in cell surface	ISO Inferred from Sequence Orthology more info	PubMed
located_in cytoplasm	IDA Inferred from Direct Assay more info	PubMed
located_in dendrite	IEA Inferred from Electronic Annotation more info
located_in dendrite	ISO Inferred from Sequence Orthology more info
located_in early endosome	IDA Inferred from Direct Assay more info	PubMed
located_in early endosome	ISO Inferred from Sequence Orthology more info
located_in early endosome	ISS Inferred from Sequence or Structural Similarity more info
located_in early endosome membrane	IEA Inferred from Electronic Annotation more info
located_in late endosome	IDA Inferred from Direct Assay more info	PubMed
located_in late endosome	ISO Inferred from Sequence Orthology more info
located_in late endosome	ISS Inferred from Sequence or Structural Similarity more info
located_in late endosome membrane	IEA Inferred from Electronic Annotation more info
located_in mitochondrion	IEA Inferred from Electronic Annotation more info
located_in mitochondrion	ISO Inferred from Sequence Orthology more info
located_in neuronal cell body	IEA Inferred from Electronic Annotation more info
located_in neuronal cell body	ISO Inferred from Sequence Orthology more info
is_active_in plasma membrane	IBA Inferred from Biological aspect of Ancestor more info
located_in plasma membrane	ISO Inferred from Sequence Orthology more info	PubMed
located_in plasma membrane	ISS Inferred from Sequence or Structural Similarity more info
located_in plasma membrane	TAS Traceable Author Statement more info
part_of protein-containing complex	IDA Inferred from Direct Assay more info	PubMed
part_of protein-containing complex	ISO Inferred from Sequence Orthology more info
part_of protein-containing complex	ISS Inferred from Sequence or Structural Similarity more info
part_of receptor complex	IBA Inferred from Biological aspect of Ancestor more info
part_of receptor complex	ISO Inferred from Sequence Orthology more info	PubMed
located_in recycling endosome	ISO Inferred from Sequence Orthology more info
located_in recycling endosome membrane	IEA Inferred from Electronic Annotation more info

General protein information

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Preferred Names: high affinity nerve growth factor receptor

NP_001028296.1

EC 2.7.10.1

XP_006501187.1

EC 2.7.10.1

XP_036018815.1

EC 2.7.10.1

NCBI Reference Sequences (RefSeq)

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

mRNA and Protein(s)

NM_001033124.1 → NP_001028296.1 high affinity nerve growth factor receptor precursor

See identical proteins and their annotated locations for NP_001028296.1

Status: VALIDATED

Source sequence(s)

AK081588, AK148691, CO043466

Consensus CDS

CCDS50947.1

UniProtKB/Swiss-Prot

Q3UFB7

Related

ENSMUSP00000029712.5, ENSMUST00000029712.5

Conserved Domains (7) summary

cd04971
Location:301 → 382

Ig_TrKABC_d5; Fifth domain (immunoglobulin-like) of Trk receptors TrkA, TrkB and TrkC

cd04972
Location:197 → 284

Ig_TrkABC_d4; Fourth domain (immunoglobulin-like) of Trk receptors TrkA, TrkB and TrkC

smart00219
Location:513 → 784

TyrKc; Tyrosine kinase, catalytic domain

sd00031
Location:68 → 92

LRR_1; leucine-rich repeat [structural motif]

pfam13855
Location:92 → 150

LRR_8; Leucine rich repeat

cl15307
Location:151 → 194

TPKR_C2; Tyrosine-protein kinase receptor C2 Ig-like domain

cl21453
Location:507 → 786

PKc_like; Protein Kinases, catalytic domain

RefSeqs of Annotated Genomes: GCF_000001635.27-RS_2024_02

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference GRCm39 C57BL/6J

Genomic

NC_000069.7 Reference GRCm39 C57BL/6J

Range

87685551..87702549 complement

Download

GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

XM_006501124.4 → XP_006501187.1 high affinity nerve growth factor receptor isoform X1

Conserved Domains (6) summary

cd04971
Location:301 → 382

Ig_TrKABC_d5; Fifth domain (immunoglobulin-like) of Trk receptors TrkA, TrkB and TrkC

cd04972
Location:197 → 284

Ig_TrkABC_d4; Fourth domain (immunoglobulin-like) of Trk receptors TrkA, TrkB and TrkC

sd00031
Location:68 → 92

LRR_1; leucine-rich repeat [structural motif]

pfam13855
Location:92 → 150

LRR_8; Leucine rich repeat

pfam16920
Location:151 → 194

TPKR_C2; Tyrosine-protein kinase receptor C2 Ig-like domain

cl21453
Location:501 → 780

PKc_like; Protein Kinases, catalytic domain
XM_036162922.1 → XP_036018815.1 high affinity nerve growth factor receptor isoform X2

Conserved Domains (4) summary

cd00096
Location:33 → 42

Ig; Ig strand E [structural motif]

cd04971
Location:72 → 167

IgI_TrKABC_d5; Fifth domain (immunoglobulin-like) of Trk receptors TrkA, TrkB, and TrkC; member of the I-set of Ig superfamily (IgSF) domains

cl11960
Location:27 → 69

Ig; Immunoglobulin domain

cl21453
Location:292 → 571

PKc_like; Protein Kinases, catalytic domain