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Gene Review

TMIE  -  transmembrane inner ear

Homo sapiens

Synonyms: Transmembrane inner ear expressed protein
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Disease relevance of TMIE

  • Consistent with a conserved role for this gene in the cochlea, the genetic mapping data presented here support human TMIE as the gene affected at DFNB6, a non-syndromic hearing loss locus [1].

High impact information on TMIE

  • Mutations in a novel gene, TMIE, are associated with hearing loss linked to the DFNB6 locus [2].
  • The mutations include an insertion, a deletion, and three missense mutations, and they indicate that loss of function of TMIE causes hearing loss in humans [2].
  • TMIE encodes a protein with 156 amino acids and exhibits no significant nucleotide or deduced amino acid sequence similarity to any other gene [2].
  • Tmie transcripts were identified in several tissues, including the cochlea [1].
  • Loss of function of Tmie results in postnatal alterations of sensory hair cells in the cochlea, including defects in stereocilia, the apical projections of hair cells that are important in mechanotransduction of sound [1].

Biological context of TMIE

  • Two-point and multipoint parametric linkage analyses were performed, and families with logarithmic odds (LOD) scores of 1.0 or greater within the TMIE region underwent further DNA sequencing [3].
  • Of seven families that were screened for TMIE, putatively functional sequence variants were found to segregate with hearing impairment in four families but were not seen in not less than 110 ethnically matched control chromosomes [3].
  • To determine putatively functional sequence variants in the transmembrane inner ear (TMIE) gene in Pakistani and Jordanian families with autosomal recessive (AR) NSHI, four Jordanian and 168 Pakistani families with ARNSHI that is not due to GJB2 (CX26) were submitted to a genome scan [3].

Anatomical context of TMIE

  • We have identified five different homozygous recessive mutations in a novel gene, TMIE (transmembrane inner ear expressed gene), in affected members of consanguineous families segregating severe-to-profound prelingual deafness, consistent with linkage to DFNB6 [2].


  1. Mutation of the novel gene Tmie results in sensory cell defects in the inner ear of spinner, a mouse model of human hearing loss DFNB6. Mitchem, K.L., Hibbard, E., Beyer, L.A., Bosom, K., Dootz, G.A., Dolan, D.F., Johnson, K.R., Raphael, Y., Kohrman, D.C. Hum. Mol. Genet. (2002) [Pubmed]
  2. Mutations in a novel gene, TMIE, are associated with hearing loss linked to the DFNB6 locus. Naz, S., Giguere, C.M., Kohrman, D.C., Mitchem, K.L., Riazuddin, S., Morell, R.J., Ramesh, A., Srisailpathy, S., Deshmukh, D., Riazuddin, S., Griffith, A.J., Friedman, T.B., Smith, R.J., Wilcox, E.R. Am. J. Hum. Genet. (2002) [Pubmed]
  3. Novel sequence variants in the TMIE gene in families with autosomal recessive nonsyndromic hearing impairment. Santos, R.L., El-Shanti, H., Sikandar, S., Lee, K., Bhatti, A., Yan, K., Chahrour, M.H., McArthur, N., Pham, T.L., Mahasneh, A.A., Ahmad, W., Leal, S.M. J. Mol. Med. (2006) [Pubmed]
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