This report describes deafness, autosomal recessive 67. The human gene implicated in this disease is LHFPL5, a tetraspan transmembrane protein thought to play a role in mechanotransduction in the hair cells of the inner ear. There is a single orthologous gene in flies, Tmhs, for which RNAi-targeting constructs, alleles caused by insertional mutagenesis, and many classical amorphic and hypomorphic mutations have been generated. Dmel\Tmhs is also orthologous to the human genes LHFPL3 and LHFPL4.
The human LHFPL5 gene has not been introduced into flies.
Adult flies heterozygous for a loss-of-function mutation of Dmel\Tmhs have been tested for response to an acoustic stimulus, the Drosophila courtship song, using an electrophysiological assay to record sound-evoked potentials from the antennae. Mean responses are significantly reduced, compared to wild-type flies.
[updated Dec. 2019 by FlyBase; FBrf0222196]
[DEAFNESS, AUTOSOMAL RECESSIVE 67; DFNB67](https://omim.org/entry/610265)
[LHFPL TETRASPAN SUBFAMILY, MEMBER 5; LHFPL5](https://omim.org/entry/609427)
DFNB67 is caused by homozygous mutation in the lipoma HMGIC fusion partner-like 5 gene (LHFPL5).
LHFPL5 is a member of the LHFP gene family, which is a subset of the superfamily of tetraspan transmembrane protein encoding genes. The encoded protein may be a component of the mechanotransduction machinery in the hair cells of the inner ear. [Gene Cards, LHFPL5; 2019.12.17]
Members of the Tetraspan (4 TMS) Junctional Complex (4JC) Superfamily all share similar 4 transmembrane alpha-helical (TMS) topologies. [HGNC, Gene Group: Tetraspan junctional complex superfamily; 2019.12.17]
Many to one: 3 human genes to 1 Drosophila.
Moderate- to high-scoring ortholog of human LHFPL3, LHFPL4, and LHFPL5 (1 Drosophila to 3 human). Dmel\Tmhs shares 34-38% identity and 57-58% similarity with the human genes.