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TECTA gene
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Gene

TECTA gene

The TECTA gene provides instructions for making alpha-tectorin, a protein essential for the proper development and function of the tectorial membrane in the inner ear.

Overview

The TECTA gene provides instructions for making a protein called alpha-tectorin. This protein is a key component of the tectorial membrane, a structure located within the snail-shaped cochlea of the inner ear. The cochlea is responsible for converting sound waves into electrical nerve impulses that are transmitted to the brain, a process critical for normal hearing. Alpha-tectorin is a large protein with multiple regions, or domains, that interact with itself and other proteins to ensure the tectorial membrane develops properly.

Health Conditions Related to Genetic Changes

Nonsyndromic hearing loss

Pathogenic variants in the TECTA gene are associated with nonsyndromic hearing loss, which is a partial or total loss of hearing not linked to other signs or symptoms. This gene is associated with two specific forms:

  • DFNA8/12: Inherited in an autosomal dominant pattern, this form can be prelingual (before speech) or postlingual (after speech). Pathogenic variants lead to amino acid substitutions in alpha-tectorin, which alter the structure of the tectorial membrane and disrupt sound conversion. The specific type of hearing loss—such as mid-frequency or high-frequency—often depends on which domain of the protein is affected.
  • DFNB21: Inherited in an autosomal recessive pattern, this form is typically prelingual. Pathogenic variants create a premature stop signal, resulting in a nonfunctional version of alpha-tectorin or no protein at all. This prevents the formation of a working tectorial membrane, leading to a total loss of the ability to convert sound into nerve impulses.

Other Names for This Gene

  • DFNA12
  • DFNA8
  • DFNB21

Frequently Asked Questions

DFNA8/12 is inherited in an autosomal dominant pattern, meaning only one copy of the mutated gene is needed to cause hearing loss, which can be partial or total and may progress over time. DFNB21 is inherited in an autosomal recessive pattern, requiring two copies of the mutated gene. DFNB21 is typically more severe, resulting in profound prelingual hearing loss because the mutations usually create a nonfunctional protein or no protein at all, preventing the tectorial membrane from forming properly.
Yes, because the hearing loss is sensorineural (due to damage in the inner ear structure rather than the ear canal or middle ear), amplification is the standard treatment. Individuals with partial or moderate loss may benefit from hearing aids, while those with profound loss, particularly in DFNB21, are often candidates for cochlear implants, which bypass the damaged hair cells and tectorial membrane to stimulate the auditory nerve directly.
lpha-tectorin is a large protein with distinct domains that interact with other proteins to build the tectorial membrane. Mutations in different domains disrupt specific structural interactions. For example, changes in certain domains may lead to mid-frequency hearing loss, while others affect high-frequency hearing. The precise impact on the membrane's stiffness and structure dictates which frequencies are impaired.
In most cases, TECTA mutations cause bilateral (two-sided) hearing loss. However, the degree of loss can sometimes be asymmetric, meaning one ear may be more affected than the other. This asymmetry can depend on the specific mutation and the extent of the structural defect in the tectorial membrane of each cochlea.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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