Netrin 1 (original) (raw)

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Protein-coding gene in the species Homo sapiens

NTN1
Available structuresPDBOrtholog search: O95631 PDBe O95631 RCSB List of PDB id codes4URT
Identifiers
Aliases NTN1, NTN1L, netrin 1, MRMV4
External IDs OMIM: 601614; MGI: 105088; HomoloGene: 21008; GeneCards: NTN1; OMA:NTN1 - orthologs
Gene location (Human)Chromosome 17 (human)Chr.Chromosome 17 (human)[1]Chromosome 17 (human)Genomic location for NTN1Genomic location for NTN1Band17p13.1Start9,021,510 bp[1]End9,244,000 bp[1]
Gene location (Mouse)Chromosome 11 (mouse)Chr.Chromosome 11 (mouse)[2]Chromosome 11 (mouse)Genomic location for NTN1Genomic location for NTN1Band11|11 B3Start68,100,190 bp[2]End68,291,649 bp[2]
RNA expression patternBgeeHuman Mouse (ortholog)Top expressed ingastric mucosaright auricle of heartDescending thoracic aortaascending aortapopliteal arterytibial arteriesolfactory zone of nasal mucosaapex of heartparotid glandmucosa of esophagusTop expressed inCerebral white mattertunica media of zone of aortaankle jointankledermisascending aortavas deferensaortic valveatriummyocardium of ventricleMore reference expression dataBioGPSMore reference expression data
Gene ontologyMolecular function protein binding Cellular component extracellular region cytoplasm basement membrane Biological process mammary gland duct morphogenesis positive regulation of cell motility axon guidance substrate-dependent cell migration, cell extension Cdc42 protein signal transduction positive regulation of axon extension inner ear morphogenesis negative regulation of axon extension apoptotic process mammary gland development positive regulation of cell population proliferation regulation of cell migration Ras protein signal transduction anterior/posterior axon guidance neuron migration axonogenesis nuclear migration cell-cell adhesion negative regulation of netrin-activated signaling pathway regulation of synapse assembly chemorepulsion of axon motor neuron axon guidance animal organ morphogenesis tissue development dendrite development Sources:Amigo / QuickGO
OrthologsSpeciesHuman MouseEntrez942318208EnsemblENSG00000065320ENSMUSG00000020902UniProtH7BZF4O95631O09118RefSeq (mRNA)NM_004822NM_008744RefSeq (protein)NP_004813NP_032770Location (UCSC)Chr 17: 9.02 – 9.24 MbChr 11: 68.1 – 68.29 MbPubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

Netrin-1 is a protein that in humans is encoded by the NTN1 gene.[5][6]

Netrin is included in a family of laminin-related secreted proteins. The function of this gene has not yet been defined; however, netrin is thought to be involved in axon guidance and cell migration during development. Mutations and loss of expression of netrin suggest that variation in netrin may be involved in cancer development.[6]

NTN1 has been shown to interact with Deleted in Colorectal Cancer,[5][7] and components of the extracellular matrix and the tumor microenvironment.[8]

Midline crossing of commissural axons

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During the development of the central nervous system, when the dorsal and ventral signaling is being established, the floor plate is an important site for crossing for groups of neural processes at the dorsal midline. Once crossed through the floor plate, these groups are now referred to as commissural axons. These neuronal cell bodies are signaled by Netrin 1 to be attracted to the floor plate from the dorsal half of the neural tube. NTN1 is a gene that encodes for the protein, Netrin-1. In a study done in knockout mice with a depletion of floor plate Netrin-1, it was shown that corticospinal axon tract midline crossing was disrupted.[9] This study was done to show characteristics of patients with human congenital mirror movement disorder.

Afterwards, proper positioning of axons and midline crossing are pioneered by the Slit-Robo system where Slit proteins act as axonal repellents and Robo proteins (Robo-1, Robo-2, Robo-3) act in conjunction with Slit ligands to be their receptors.[10] Slit with Robo-1 and Robo-2 repel axonal extension at the midline thereby commissural axons expressing Robo-3 cross the midline by interfering with Slit/Robo-1, Robo-2 repulsive activity. After crossing the floor plate, Robo-3 is downregulated and Slit/Robo-1, Robo-2 continue to express their repulsiveness at the midline. Furthermore, mutations in Robo-3 cause horizontal gaze palsy with progressive scoliosis.

  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000065320Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000020902Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. ^ a b Meyerhardt JA, Caca K, Eckstrand BC, Hu G, Lengauer C, Banavali S, Look AT, Fearon ER (January 1999). "Netrin-1: interaction with deleted in colorectal cancer (DCC) and alterations in brain tumors and neuroblastomas". Cell Growth Differ. 10 (1): 35–42. PMID 9950216.
  6. ^ a b "Entrez Gene: NTN1 netrin 1".
  7. ^ Geisbrecht, Brian V; Dowd Kimberly A; Barfield Ronald W; Longo Patti A; Leahy Daniel J (Aug 2003). "Netrin binds discrete subdomains of DCC and UNC5 and mediates interactions between DCC and heparin". J. Biol. Chem. 278 (35). United States: 32561–8. doi:10.1074/jbc.M302943200. ISSN 0021-9258. PMID 12810718.
  8. ^ Kryza D, Wischhusen J, Richaud M, Hervieu M, Sidi Boumedine J, Delcros JG, Besse S, Baudier T, Laval PA, Breusa S, Boutault E, Clermidy H, Rama N, Ducarouge B, Devouassoux-Shisheboran M, Chezal JM, Giraudet AL, Walter T, Mehlen P, Sarrut D, Gibert B.From netrin-1-targeted SPECT/CT to internal radiotherapy for management of advanced solid tumors. EMBO Mol Med. 2023 Apr 11;15(4):e16732. doi: 10.15252/emmm.202216732. Epub 2023 Mar 6. PMID 36876343
  9. ^ Pourchet, Oriane (Jan 19, 2021). "Loss of floor plate Netrin-1 impairs midline crossing of corticospinal axons and leads to mirror movements". Cell Reports. 34 (3): 108654. doi:10.1016/j.celrep.2020.108654. hdl:10261/308989. PMID 33472083. S2CID 231663364.
  10. ^ Blockus, Heike; Chedotal, Alain (Sep 1, 2016). "Slit-Robo signaling". Development. 143 (17): 3037–3044. doi:10.1242/dev.132829. PMID 27578174. S2CID 10315151.

Varadarajan, Supraja G., et al. "Netrin1 produced by neural progenitors, not floor plate cells, is required for axon guidance in the spinal cord." Neuron 94.4 (2017): 790-799.https://doi.org/10.1016/j.neuron.2017.03.007