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NDP norrin cystine knot growth factor NDP [ Homo sapiens (human) ]

Gene ID: 4693, updated on 6-Jul-2026
Official Symbol
NDPprovided by HGNC
Official Full Name
norrin cystine knot growth factor NDPprovided by HGNC
Primary source
HGNC:HGNC:7678
See related
Ensembl:ENSG00000124479 MIM:300658; AllianceGenome:HGNC:7678
Gene type
protein coding
RefSeq status
REVIEWED
Organism
Homo sapiens
Lineage
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as
ND; EVR2; FEVR
Summary
This gene encodes a secreted protein with a cystein-knot motif that activates the Wnt/beta-catenin pathway. The protein forms disulfide-linked oligomers in the extracellular matrix. Mutations in this gene result in Norrie disease and X-linked exudative vitreoretinopathy. [provided by RefSeq, Feb 2009]
Expression
Biased expression in ovary (RPKM 17.5), endometrium (RPKM 9.6) and 3 other tissues See more
Orthologs
Try the new Gene page
Try the new Transcripts and proteins table
See NDP in Genome Data Viewer
Location:
Xp11.3
Exon count:
3
Annotation release Status Assembly Chr Location
RS_2025_08 current GRCh38.p14 (GCF_000001405.40) X NC_000023.11 (43948776..43973390, complement)
RS_2025_08 current T2T-CHM13v2.0 (GCF_009914755.1) X NC_060947.1 (43354970..43379584, complement)
RS_2024_09 previous assembly GRCh37.p13 (GCF_000001405.25) X NC_000023.10 (43808022..43832636, complement)

Chromosome X - NC_000023.11Genomic Context describing neighboring genes Neighboring gene ReSE screen-validated silencer GRCh37_chrX:43514055-43514449 Neighboring gene monoamine oxidase A Neighboring gene monoamine oxidase B Neighboring gene H3K4me1 hESC enhancer GRCh37_chrX:43808655-43809172 Neighboring gene H3K4me1 hESC enhancer GRCh37_chrX:43809173-43809689 Neighboring gene NDP antisense RNA 1 Neighboring gene RBM39 pseudogene 1 Neighboring gene EF-hand domain containing 2 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 20782 Neighboring gene H3K27ac hESC enhancer GRCh37_chrX:44111858-44112711 Neighboring gene H3K27ac hESC enhancer GRCh37_chrX:44112712-44113564 Neighboring gene Sharpr-MPRA regulatory region 13194 Neighboring gene TatD DNase domain containing 2 pseudogene 1

  • Project title: Tissue-specific circular RNA induction during human fetal development
  • Description: 35 human fetal samples from 6 tissues (3 - 7 replicates per tissue) collected between 10 and 20 weeks gestational time were sequenced using Illumina TruSeq Stranded Total RNA
  • BioProject: PRJNA270632
  • Publication: PMID 26076956
  • Analysis date: Mon Apr 2 22:54:59 2018

GeneRIFs: Gene References Into Functions

What's a GeneRIF?

Associated conditions

Description Tests
Atrophia bulborum hereditaria
MedGen: C0266526 OMIM: 310600 GeneReviews: Not available
not available
Exudative vitreoretinopathy 2, X-linked
MedGen: C1844579 OMIM: 305390 GeneReviews: Not available
not available

Copy number response

Description
Copy number response
Triplosensitivity

No evidence available (Last evaluated 2012-06-14)

ClinGen Genome Curation Page
Haploinsufficency

Sufficient evidence for dosage pathogenicity (Last evaluated 2012-06-14)

ClinGen Genome Curation PagePubMed

Protein interactions

Protein Gene Interaction Pubs
Envelope transmembrane glycoprotein gp41 env A synthetic peptide corresponding to the immunosuppressive domain (amino acids 574-592) of HIV-1 gp41 upregulates the expression of Norrie disease protein (NDP) in peptide-treated PBMCs PubMed

Go to the HIV-1, Human Interaction Database

Products Interactant Other Gene Complex Source Pubs Description

Markers

Gene Ontology Provided by GOA

Function Evidence Code Pubs
enables cytokine activity IBA
Inferred from Biological aspect of Ancestor
more info
 
enables cytokine activity IDA
Inferred from Direct Assay
more info
PubMed 
enables cytokine activity IEA
Inferred from Electronic Annotation
more info
 
enables frizzled binding IBA
Inferred from Biological aspect of Ancestor
more info
 
enables frizzled binding IEA
Inferred from Electronic Annotation
more info
 
enables frizzled binding IPI
Inferred from Physical Interaction
more info
PubMed 
enables protein binding IPI
Inferred from Physical Interaction
more info
PubMed 
enables protein homodimerization activity IPI
Inferred from Physical Interaction
more info
PubMed 
Component Evidence Code Pubs
located_in cell surface IDA
Inferred from Direct Assay
more info
PubMed 
located_in extracellular region IDA
Inferred from Direct Assay
more info
PubMed 
located_in extracellular region IEA
Inferred from Electronic Annotation
more info
 
Preferred Names
norrin
Names
NDP, norrin cystine knot growth factor
Norrie disease (pseudoglioma)
X-linked exudative vitreoretinopathy 2 protein
norrie disease protein

NEW Try the new Transcript table

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.

Genomic

  1. NG_009832.1 RefSeqGene

    Range
    5286..29900
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. NM_000266.4NP_000257.1  norrin precursor

    See identical proteins and their annotated locations for NP_000257.1

    Status: REVIEWED

    Source sequence(s)
    BC029901, X65882
    Consensus CDS
    CCDS14262.1
    UniProtKB/Swiss-Prot
    B2R8K6, Q00604, Q5JYH5
    Related
    ENSP00000495972.1, ENST00000642620.1
    Conserved Domains (1) summary
    smart00041
    Location:43129
    CT; C-terminal cystine knot-like domain (CTCK)

RefSeqs of Annotated Genomes: GCF_000001405.40-RS_2025_08

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

Reference GRCh38.p14 Primary Assembly

Genomic

  1. NC_000023.11 Reference GRCh38.p14 Primary Assembly

    Range
    43948776..43973390 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

Alternate T2T-CHM13v2.0

Genomic

  1. NC_060947.1 Alternate T2T-CHM13v2.0

    Range
    43354970..43379584 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)