Whirlin (WHRN)

Whirlin is a large multidomain scaffolding protein essential for sensory neuron function, notably in the auditory and visual systems. It localizes to structures critical for hearing (stereocilia of hair cells in the inner ear) and vision (periciliary membrane complex in retina photoreceptors). The protein is necessary for the proper elongation and maintenance of hair cell stereocilia, as well as for the organization of protein complexes important for mechanotransduction and phototransduction. Mutations in WHRN lead to varying forms of sensorineural deafness and are a principal genetic cause of Usher syndrome type 2D, which combines congenital hearing loss with progressive retinal degeneration. Whirlin interacts with several other Usher syndrome proteins, forming a complex that is fundamental to the development and stability of sensory cellular architectures. No drugs currently target whirlin directly, and its primary clinical significance lies in genetic diagnosis and potential research into gene therapies for Usher syndrome. Whirlin/WHRN is not a receptor, enzyme, transporter, or canonical drug target but is a critical scaffolding/signaling protein in sensory cells. The principal involvement is as a disease gene rather than a pharmacological target; mutations cause hereditary deafness and Usher syndrome. While not presently a therapeutic target, it is a vital biomarker for genetic forms of deafness and syndromic vision loss.

Other names

DFNB31KIAA1526CIP98USH2DPDZD7BAutosomal recessive deafness type 31 proteinCASK-interacting protein CIP98WI