RGD Reference Report - MKS3/TMEM67 mutations are a major cause of COACH Syndrome, a Joubert Syndrome related disorder with liver involvement. - Rat Genome Database

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MKS3/TMEM67 mutations are a major cause of COACH Syndrome, a Joubert Syndrome related disorder with liver involvement.

Authors: Brancati, F  Iannicelli, M  Travaglini, L  Mazzotta, A  Bertini, E  Boltshauser, E  D'Arrigo, S  Emma, F  Fazzi, E  Gallizzi, R  Gentile, M  Loncarevic, D  Mejaski-Bosnjak, V  Pantaleoni, C  Rigoli, L  Salpietro, CD  Signorini, S  Stringini, GR  Verloes, A  Zabloka, D  Dallapiccola, B  Gleeson, JG  Valente, EM   
Citation: Brancati F, etal., Hum Mutat. 2009 Feb;30(2):E432-42. doi: 10.1002/humu.20924.
RGD ID: 11535944
Pubmed: PMID:19058225   (View Abstract at PubMed)
PMCID: PMC2635428   (View Article at PubMed Central)
DOI: DOI:10.1002/humu.20924   (Journal Full-text)

The acronym COACH defines an autosomal recessive condition of Cerebellar vermis hypo/aplasia, Oligophrenia, congenital Ataxia, Coloboma and Hepatic fibrosis. Patients present the "molar tooth sign", a midbrain-hindbrain malformation pathognomonic for Joubert Syndrome (JS) and Related Disorders (JSRDs). The main feature of COACH is congenital hepatic fibrosis (CHF), resulting from malformation of the embryonic ductal plate. CHF is invariably found also in Meckel syndrome (MS), a lethal ciliopathy already found to be allelic with JSRDs at the CEP290 and RPGRIP1L genes. Recently, mutations in the MKS3 gene (approved symbol TMEM67), causative of about 7% MS cases, have been detected in few Meckel-like and pure JS patients. Analysis of MKS3 in 14 COACH families identified mutations in 8 (57%). Features such as colobomas and nephronophthisis were found only in a subset of mutated cases. These data confirm COACH as a distinct JSRD subgroup with core features of JS plus CHF, which major gene is MKS3, and further strengthen gene-phenotype correlates in JSRDs.




  
Object Symbol
Species
Term
Qualifier
Evidence
With
Notes
Source
Original Reference(s)
TMEM67HumanCOACH syndrome  IAGP DNA:missense mutations: :multipleRGD 
Tmem67MouseCOACH syndrome  ISOTMEM67 (Homo sapiens)DNA:missense mutations: :multipleRGD 
Tmem67RatCOACH syndrome  ISOTMEM67 (Homo sapiens)DNA:missense mutations: :multipleRGD 


Genes (Rattus norvegicus)
Tmem67  (transmembrane protein 67)

Genes (Mus musculus)
Tmem67  (transmembrane protein 67)

Genes (Homo sapiens)
TMEM67  (transmembrane protein 67)