Usher Syndrome, Type 3a malady

Genetic diseases, Rare diseases, Eye diseases, Ear diseases, Fetal diseases categories

Aliases & Classifications for Usher Syndrome, Type 3a

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49OMIM, 11diseasecard, 22GeneTests, 45NIH Rare Diseases, 51Orphanet, 24GTR, 67UniProtKB/Swiss-Prot, 65UMLS, 28ICD10 via Orphanet, 66UMLS via Orphanet, 34MedGen, 36MeSH
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Aliases & Descriptions for Usher Syndrome, Type 3a:

Name: Usher Syndrome, Type 3a 49 11 22
Usher Syndrome Type 3 45 22 51 24 67
Ush3a 45 22 67
Ush3 45 51 67
Usher Syndrome, Type Iii 65
Usher Syndrome Type Iii 67
Usher's Syndrome Type 3 67
Usher Syndrome Iii 67
Usher Syndrome 3a 67


Characteristics (Orphanet epidemiological data):

usher syndrome type 3:
Inheritance: Autosomal recessive; Age of onset: Infancy,Neonatal

External Ids:

OMIM49 276902
Orphanet51 231183
ICD10 via Orphanet28 H35.5
UMLS via Orphanet66 C1568248
MedGen34 C1568248
MeSH36 D052245

Summaries for Usher Syndrome, Type 3a

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UniProtKB/Swiss-Prot:67 Usher syndrome 3A: USH is a genetically heterogeneous condition characterized by the association of retinitis pigmentosa with sensorineural deafness. Age at onset and differences in auditory and vestibular function distinguish Usher syndrome type 1 (USH1), Usher syndrome type 2 (USH2) and Usher syndrome type 3 (USH3). USH3 is characterized by postlingual, progressive hearing loss, variable vestibular dysfunction, and onset of retinitis pigmentosa symptoms, including nyctalopia, constriction of the visual fields, and loss of central visual acuity, usually by the second decade of life.

MalaCards based summary: Usher Syndrome, Type 3a, also known as usher syndrome type 3, is related to usher syndrome and usher syndrome, type 2a, and has symptoms including sensorineural hearing impairment, visual impairment and abnormal electroretinogram. An important gene associated with Usher Syndrome, Type 3a is CLRN1 (Clarin 1), and among its related pathways is tRNA Aminoacylation. Affiliated tissues include eye and retina.

NIH Rare Diseases:45 Usher syndrome is a genetic condition characterized by hearing loss or deafness, and progressive vision loss due to retinitis pigmentosa. three major types of usher syndrome have been described - types i, ii, and iii.  the different types are distinguished by their severity and the age when signs and symptoms appear. all three types are inherited in an autosomal recessive manner, which means both copies of the disease-causing gene in each cell have mutations. last updated: 3/3/2014

OMIM:49 Usher syndrome type III is characterized by postlingual, progressive hearing loss, variable vestibular dysfunction, and... (276902) more...

Related Diseases for Usher Syndrome, Type 3a

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Graphical network of diseases related to Usher Syndrome, Type 3a:

Diseases related to usher syndrome, type 3a

Symptoms for Usher Syndrome, Type 3a

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Symptoms by clinical synopsis from OMIM:


Clinical features from OMIM:



 51 (show all 15)
  • retinitis pigmentosa/retinal pigmentary changes
  • visual loss/blindness/amblyopia
  • night blindness/hemeralopia
  • abnormal erg/electroretinogram/electroretinography
  • abnormal visual field/hemianopsia/hemianopia/scotoma/visual peripheral rim
  • structural anomalies of inner ear/cochlea/vestible/semicircular canals
  • sensorineural deafness/hearing loss
  • autosomal recessive inheritance
  • cataract/lens opacification
  • hypermetropia
  • astigmatism
  • ataxia/incoordination/trouble of the equilibrium
  • delirium/hallucination
  • humour troubles/anxiety/depression/apathy/euphoria/irritability
  • psychosis/schizophrenia/maniac disorder

HPO human phenotypes related to Usher Syndrome, Type 3a:

(show all 18)
id Description Frequency HPO Source Accession
1 sensorineural hearing impairment hallmark (90%) HP:0000407
2 visual impairment hallmark (90%) HP:0000505
3 abnormal electroretinogram hallmark (90%) HP:0000512
4 nyctalopia hallmark (90%) HP:0000662
5 visual field defect hallmark (90%) HP:0001123
6 abnormality of retinal pigmentation hallmark (90%) HP:0007703
7 astigmatism typical (50%) HP:0000483
8 cataract typical (50%) HP:0000518
9 hypermetropia typical (50%) HP:0000540
10 incoordination typical (50%) HP:0002311
11 hallucinations occasional (7.5%) HP:0000738
12 autosomal recessive inheritance HP:0000007
13 sensorineural hearing impairment HP:0000407
14 rod-cone dystrophy HP:0000510
15 nyctalopia HP:0000662
16 visual field defect HP:0001123
17 vestibular dysfunction HP:0001751
18 reduced visual acuity HP:0007663

Drugs & Therapeutics for Usher Syndrome, Type 3a

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Interventional clinical trials:

idNameStatusNCT IDPhase
1Retinal Imaging of Subjects Implanted With Ciliary Neurotrophic Factor (CNTF)-Releasing Encapsulated Cell Implant for Early-stage Retinitis PigmentosaRecruitingNCT01530659Phase 2
2Study of UshStat in Patients With Retinitis Pigmentosa Associated With Usher Syndrome Type 1BRecruitingNCT01505062Phase 1, Phase 2
3Molecular Genetics of Retinal DegenerationsRecruitingNCT00231010
4Natural History and Genetic Studies of Usher SyndromeActive, not recruitingNCT00106743

Search NIH Clinical Center for Usher Syndrome, Type 3a

Genetic Tests for Usher Syndrome, Type 3a

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Genetic tests related to Usher Syndrome, Type 3a:

id Genetic test Affiliating Genes
1 Usher Syndrome Type 322 HARS
2 Usher Syndrome Type 3a22 CLRN1
3 Usher Syndrome, Type 324

Anatomical Context for Usher Syndrome, Type 3a

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MalaCards organs/tissues related to Usher Syndrome, Type 3a:

Eye, Retina

Animal Models for Usher Syndrome, Type 3a or affiliated genes

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Publications for Usher Syndrome, Type 3a

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Articles related to Usher Syndrome, Type 3a:

The cone-dominant retina and the inner ear of zebrafish express the ortholog of CLRN1, the causative gene of human Usher syndrome type 3A. (24045267)

Variations for Usher Syndrome, Type 3a

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UniProtKB/Swiss-Prot genetic disease variations for Usher Syndrome, Type 3a:

id Symbol AA change Variation ID SNP ID

Clinvar genetic disease variations for Usher Syndrome, Type 3a:

5 (show all 15)
id Gene Variation Type Significance SNP ID Assembly Location
1CLRN1NM_174878.2(CLRN1): c.149_152delCAGGinsTGTCCAAT (p.Ser50Leufs)indelLikely pathogenic, Pathogenicrs786204428GRCh37Chr 3, 150690344: 150690347
2CLRN1NM_174878.2(CLRN1): c.502dupA (p.Ile168Asnfs)duplicationLikely pathogenicrs746523071GRCh37Chr 3, 150645920: 150645920
3HARSNM_002109.5(HARS): c.1361A> C (p.Tyr454Ser)single nucleotide variantPathogenicrs387906639GRCh37Chr 5, 140054361: 140054361
4CLRN1NM_001195794.1(CLRN1): c.567T> G (p.Tyr189Ter)single nucleotide variantPathogenicrs121908140GRCh37Chr 3, 150645894: 150645894
5CLRN1NM_001195794.1(CLRN1): c.359T> A (p.Met120Lys)single nucleotide variantPathogenicrs121908141GRCh37Chr 3, 150659443: 150659443
6CLRN1CLRN1, 3-BP DEL, 459ATTdeletionPathogenic
7CLRN1NM_001195794.1(CLRN1): c.144T> G (p.Asn48Lys)single nucleotide variantPathogenicrs111033258GRCh37Chr 3, 150690352: 150690352
8CLRN1NM_001195794.1(CLRN1): c.488T> C (p.Leu163Pro)single nucleotide variantPathogenicrs121908142GRCh37Chr 3, 150645973: 150645973
9CLRN1NM_001195794.1(CLRN1): c.189C> A (p.Tyr63Ter)single nucleotide variantPathogenicrs111033267GRCh37Chr 3, 150690307: 150690307
10CLRN1CLRN1, 23-BP DEL, NT187deletionPathogenic
11CLRN1NM_001195794.1(CLRN1): c.118T> G (p.Cys40Gly)single nucleotide variantPathogenicrs121908143GRCh37Chr 3, 150690378: 150690378
12CLRN1NM_001195794.1(CLRN1): c.127G> A (p.Gly43Arg)single nucleotide variantLikely pathogenicrs111033434GRCh37Chr 3, 150690369: 150690369
13CLRN1NM_001195794.1(CLRN1): c.301_305delGTCAT (p.Val101Serfs)deletionLikely pathogenic, Pathogenicrs397517932GRCh37Chr 3, 150659497: 150659501
14CLRN1NM_174878.2(CLRN1): c.368C> A (p.Ala123Asp)single nucleotide variantLikely pathogenic, Pathogenicrs374963432GRCh37Chr 3, 150659434: 150659434
15MT-TS2m.12258C> Asingle nucleotide variantPathogenicrs118203888GRCh37Chr MT, 12258: 12258

Expression for genes affiliated with Usher Syndrome, Type 3a

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Search GEO for disease gene expression data for Usher Syndrome, Type 3a.

Pathways for genes affiliated with Usher Syndrome, Type 3a

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Pathways related to Usher Syndrome, Type 3a according to GeneCards Suite gene sharing:

idSuper pathways (with members indented)ScoreTop Affiliating Genes
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GO Terms for genes affiliated with Usher Syndrome, Type 3a

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Sources for Usher Syndrome, Type 3a

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28ICD10 via Orphanet
37MESH via Orphanet
50OMIM via Orphanet
60SNOMED-CT via Orphanet
64Tumor Gene Family of Databases
66UMLS via Orphanet