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IMPG1 interphotoreceptor matrix proteoglycan 1 [ Homo sapiens (human) ]

Gene ID: 3617, updated on 5-Mar-2024

Summary

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Official Symbol
IMPG1provided by HGNC
Official Full Name
interphotoreceptor matrix proteoglycan 1provided by HGNC
Primary source
HGNC:HGNC:6055
See related
Ensembl:ENSG00000112706 MIM:602870; AllianceGenome:HGNC:6055
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
RP91; VMD4; GP147; SPACR; IPM150
Summary
This gene encodes a protein that is a major component of the retinal interphotoreceptor matrix. The encoded protein is a proteoglycan that is thought to play a role in maintaining viability of photoreceptor cells and in adhesion of the neural retina to the retinal pigment epithelium. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Sep 2013]
Expression
Low expression observed in reference dataset See more
Orthologs
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Genomic context

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See IMPG1 in Genome Data Viewer
Location:
6q14.1
Exon count:
17
Annotation release Status Assembly Chr Location
RS_2023_10 current GRCh38.p14 (GCF_000001405.40) 6 NC_000006.12 (75921114..76072662, complement)
RS_2023_10 current T2T-CHM13v2.0 (GCF_009914755.1) 6 NC_060930.1 (77097995..77249656, complement)
105.20220307 previous assembly GRCh37.p13 (GCF_000001405.25) 6 NC_000006.11 (76630831..76782379, complement)

Chromosome 6 - NC_000006.12Genomic Context describing neighboring genes Neighboring gene myosin VI Neighboring gene small nucleolar RNA U13 Neighboring gene RNA, 5S ribosomal pseudogene 209 Neighboring gene NANOG-H3K4me1 hESC enhancer GRCh37_chr6:76644683-76645294 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr6:76646103-76646604 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr6:76646605-76647104 Neighboring gene NANOG hESC enhancer GRCh37_chr6:76696520-76697063 Neighboring gene OCT4-NANOG-H3K27ac hESC enhancer GRCh37_chr6:76702869-76703559 Neighboring gene NANOG-H3K4me1 hESC enhancer GRCh37_chr6:76820442-76820982 Neighboring gene NANOG-H3K4me1 hESC enhancer GRCh37_chr6:76820983-76821521 Neighboring gene OCT4-NANOG hESC enhancer GRCh37_chr6:76829469-76830098 Neighboring gene OCT4-NANOG hESC enhancer GRCh37_chr6:76830099-76830727 Neighboring gene RNA, U6 small nuclear 248, pseudogene Neighboring gene ReSE screen-validated silencer GRCh37_chr6:77011078-77011263 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr6:77088669-77089170 Neighboring gene OCT4-NANOG hESC enhancer GRCh37_chr6:77132408-77132991 Neighboring gene NANOG hESC enhancer GRCh37_chr6:77135272-77135773 Neighboring gene RNA, U6 small nuclear 261, pseudogene

Genomic regions, transcripts, and products

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Go to nucleotide: Graphics FASTA GenBank

Expression

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  • Project title: HPA RNA-seq normal tissues
  • Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
  • BioProject: PRJEB4337
  • Publication: PMID 24309898
  • Analysis date: Wed Apr 4 07:08:55 2018

Bibliography

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Related articles in PubMed

  1. Pathogenic variants in IMPG1 cause autosomal dominant and autosomal recessive retinitis pigmentosa. Olivier G, et al. J Med Genet, 2021 Aug. PMID 32817297
  2. Mutations in IMPG1 cause vitelliform macular dystrophies. Manes G, et al. Am J Hum Genet, 2013 Sep 5. PMID 23993198, Free PMC Article
  3. The benign concentric annular macular dystrophy locus maps to 6p12.3-q16. van Lith-Verhoeven JJ, et al. Invest Ophthalmol Vis Sci, 2004 Jan. PMID 14691150
  4. Expression and characterization of the IPM 150 gene (IMPG1) product, a novel human photoreceptor cell-associated chondroitin-sulfate proteoglycan. Kuehn MH, et al. Matrix Biol, 1999 Oct. PMID 10601738
  5. SPACR, a novel interphotoreceptor matrix glycoprotein in human retina that interacts with hyaluronan. Acharya S, et al. J Biol Chem, 1998 Nov 20. PMID 9813076

See all (22) citations in PubMed

GeneRIFs: Gene References Into Functions

What's a GeneRIF?
  1. Pathogenic variants in IMPG1 cause autosomal dominant and autosomal recessive retinitis pigmentosa.
    Title: Pathogenic variants in IMPG1 cause autosomal dominant and autosomal recessive retinitis pigmentosa.
  2. Extracellular matrix component expression in human pluripotent stem cell-derived retinal organoids recapitulates retinogenesis in vivo and reveals an important role for IMPG1 and CD44 in the development of photoreceptors and interphotoreceptor matrix.
    Title: Extracellular matrix component expression in human pluripotent stem cell-derived retinal organoids recapitulates retinogenesis in vivo and reveals an important role for IMPG1 and CD44 in the development of photoreceptors and interphotoreceptor matrix.
  3. IMPG1 and IMPG2 are new causal genes of vitelliform dystrophy, involved in 8% of our families.
    Title: Frequency and clinical pattern of vitelliform macular dystrophy caused by mutations of interphotoreceptor matrix IMPG1 and IMPG2 genes.
  4. IMPG1 mutations cause both autosomal-dominant and -recessive forms of vitelliform macular dystrophies.
    Title: Mutations in IMPG1 cause vitelliform macular dystrophies.
  5. Clinical trial of gene-disease association and gene-environment interaction. (HuGE Navigator)
    Title: Personalized smoking cessation: interactions between nicotine dose, dependence and quit-success genotype score.
  6. Observational study and genome-wide association study of gene-disease association. (HuGE Navigator)
    Title: Human variation in alcohol response is influenced by variation in neuronal signaling genes.
  7. A Leu579Pro mutation in the IMPG1 gene may play a causal role in benign concentric annular macular dystrophy (BCAMD).
    Title: The benign concentric annular macular dystrophy locus maps to 6p12.3-q16.
  8. Our results indicate that neither EEF1A1 nor IMPG1 could be responsible for RP25 in the studied families due to absence of any pathogenic variants.
    Title: Molecular genetic analysis of two functional candidate genes in the autosomal recessive retinitis pigmentosa, RP25, locus.
  9. The gene product of IMPG1 (designated IPM 150) is a member of a group of neuronal proteoglycans and/ or glycoproteins suspected to be essential in retinal adhesion and photoreceptor cell survival.
    Title: Expression and characterization of the IPM 150 gene (IMPG1) product, a novel human photoreceptor cell-associated chondroitin-sulfate proteoglycan.
Submit: New GeneRIF Correction

Phenotypes

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Find tests for this gene in the NIH Genetic Testing Registry (GTR)

Review eQTL and phenotype association data in this region using PheGenI

Associated conditions

Description Tests
Benign concentric annular macular dystrophy
MedGen: C5561925 OMIM: 153870 GeneReviews: Not available
Compare labs
Vitelliform macular dystrophy 4
MedGen: C4015342 OMIM: 616151 GeneReviews: Not available
Compare labs

EBI GWAS Catalog

Description
Parent-of-origin-specific allelic associations among 106 genomic loci for age at menarche.
EBI GWAS Catalog

Variation

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See variants in ClinVar

See studies and variants in dbVar

See Variation Viewer (GRCh37.p13)

See Variation Viewer (GRCh38)

Genotypes

Interactions

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Products Interactant Other Gene Complex Source Pubs Description

General gene information

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Markers

Homology

Gene Ontology Provided by GOA

Function Evidence Code Pubs
enables chondroitin sulfate binding ISS
Inferred from Sequence or Structural Similarity
more info
  
enables extracellular matrix structural constituent TAS
Traceable Author Statement
more info
 PubMed 
enables heparin binding ISS
Inferred from Sequence or Structural Similarity
more info
  
enables hyaluronic acid binding ISS
Inferred from Sequence or Structural Similarity
more info
  
Process Evidence Code Pubs
involved_in extracellular matrix organization IEA
Inferred from Electronic Annotation
more info
  
involved_in visual perception IEA
Inferred from Electronic Annotation
more info
  
Component Evidence Code Pubs
located_in extracellular matrix TAS
Traceable Author Statement
more info
 PubMed 
located_in extracellular region IEA
Inferred from Electronic Annotation
more info
  
located_in interphotoreceptor matrix IEA
Inferred from Electronic Annotation
more info
  
located_in photoreceptor inner segment IEA
Inferred from Electronic Annotation
more info
  
located_in photoreceptor outer segment IEA
Inferred from Electronic Annotation
more info
  

General protein information

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Preferred Names
interphotoreceptor matrix proteoglycan 1
Names
interphotoreceptor matrix proteoglycan of 150 kDa
sialoprotein associated with cones and rods

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.

Genomic

  1. NG_041812.1 RefSeqGene

    Range
    5017..156565
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. NM_001282368.2 → NP_001269297.1  interphotoreceptor matrix proteoglycan 1 isoform 2 precursor

    Status: REVIEWED

    Description
    Transcript Variant: This variant (2) lacks one in-frame alternate exon compared to variant 1. The encoded isoform (2) is shorter compared to isoform 1.
    Source sequence(s)
    AF047492, AL356962, AL392166, BU728582, CA391789
    Consensus CDS
    CCDS75483.1
    UniProtKB/TrEMBL
    A0A087WYL3
    Related
    ENSP00000481913.1, ENST00000611179.4
    Conserved Domains (1) summary
    pfam01390
    Location:496 → 582
    SEA; SEA domain

  2. NM_001563.4 → NP_001554.2  interphotoreceptor matrix proteoglycan 1 isoform 1 precursor

    See identical proteins and their annotated locations for NP_001554.2

    Status: REVIEWED

    Description
    Transcript Variant: This variant (1) represents the longer transcript and encodes the longer isoform (1).
    Source sequence(s)
    AF047492, AL356962, AL392166, BU728582
    Consensus CDS
    CCDS4985.1
    UniProtKB/Swiss-Prot
    A6NNZ6, O43686, O95094, Q17R60, Q68D53, Q9BWZ1
    Related
    ENSP00000358966.3, ENST00000369950.8
    Conserved Domains (1) summary
    pfam01390
    Location:574 → 660
    SEA; SEA domain

RefSeqs of Annotated Genomes: GCF_000001405.40-RS_2023_10

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

Reference GRCh38.p14 Primary Assembly

Genomic

  1. NC_000006.12 Reference GRCh38.p14 Primary Assembly

    Range
    75921114..76072662 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

Alternate T2T-CHM13v2.0

Genomic

  1. NC_060930.1 Alternate T2T-CHM13v2.0

    Range
    77097995..77249656 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)
Nucleotide Protein
Heading Accession and Version
Protein Accession Links
GenPept Link UniProtKB Link
Q17R60.2 GenPept UniProtKB/Swiss-Prot:Q17R60

Gene LinkOut

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Chemical Information
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