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Related Concept Videos

Hair Cells01:22

Hair Cells

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Hair cells are the sensory receptors of the auditory system—they transduce mechanical sound waves into electrical energy that the nervous system can understand. Hair cells are located in the organ of Corti within the cochlea of the inner ear, between the basilar and tectorial membranes. The actual sensory receptors are called inner hair cells. The outer hair cells serve other functions, such as sound amplification in the cochlea, and are not discussed in detail here.
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Auditory Pathway01:15

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Auditory pathways constitute the complex neural circuits responsible for transmitting and interpreting auditory information from the peripheral auditory system to the brain. Sound waves are initially captured by the outer ear, funneled through the ear canal, and reach the tympanic membrane (eardrum). These vibrations are transmitted via the middle ear's ossicles to the inner ear's cochlea.
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The Cochlea01:13

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The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
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G-Protein Gated Ion Channels01:21

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GPCRs are primarily responsible for our sense of smell, taste, and vision.  The binding of a sensory stimulus activates GPCR to stimulate effector proteins, many of which are ion channels in the sensory organs. GPCRs modulate the opening and closing of the target ion channels either directly by binding them, or by releasing second messengers that activate these channels. As ions move across the membrane, the membrane potential is altered, which induces an appropriate response.
Sensory...
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Microtubules in Signaling01:22

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The primary cilium, made up of microtubules, acts as antennae on the cell surfaces for relaying external stimuli into the cells. These fine hair-like structures are present, generally one per cell. These are non-motile cilia in a 9+0 microtubules arrangement, where the central pair of microtubules are absent. The primary cilia arise from the basal body embedded in the cell membrane. Intraflagellar transport (IFT) carries requisite proteins from the cytoplasm to the cilium because the primary...
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Tail-anchored, or TA, proteins are estimated to make up to 3-5% of membrane proteins found in the eukaryotic cell. Such proteins have a single transmembrane domain located approximately 30 amino acid residues upstream from the C-terminal end. As a result, the signal recognition particle (SRP) cannot guide a TA protein to the ER membrane for cotranslational insertion. Hence, they are integrated into the ER membrane post-translationally using their C-terminal end as the anchor. TA proteins...
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Related Experiment Video

Updated: May 4, 2026

Dextran Labeling and Uptake in Live and Functional Murine Cochlear Hair Cells
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Dextran Labeling and Uptake in Live and Functional Murine Cochlear Hair Cells

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TMC function in hair cell transduction.

Jeffrey R Holt1, Bifeng Pan1, Mounir A Koussa2

  • 1Department of Otolaryngology, F.M. Kirby Neurobiology Center, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.

Hearing Research
|January 16, 2014
PubMed
Summary
This summary is machine-generated.

Transmembrane channel-like (TMC) proteins are crucial for hearing. Research suggests TMC1 and TMC2 directly function in the hair cell mechanotransduction complex, despite ongoing debate.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Neuroscience

Background:

  • Transmembrane channel-like (TMC) proteins 1 and 2 are essential for auditory hair cell mechanotransduction.
  • Their exact role in the mechanotransduction complex remains debated, with ongoing research exploring various hypotheses.

Purpose of the Study:

  • To provide a historical overview of TMC gene identification and cloning.
  • To discuss TMC1 mutations linked to deafness in humans and mice.
  • To examine TMC mRNA expression and protein localization.

Main Methods:

  • Literature review of TMC gene family.
  • Analysis of mutation data from deaf individuals and animal models.
  • Examination of gene expression and protein localization studies.

Main Results:

  • Evidence supports TMC1 and TMC2 as direct components of the mechanotransduction machinery.
  • Mutations in TMC1 are causally linked to hereditary deafness.
  • Expression patterns and protein localization provide insights into TMC function.

Conclusions:

  • TMC proteins play a critical role in auditory function.
  • Further research is needed to fully elucidate the precise mechanisms of TMC proteins in mechanotransduction.
  • Outstanding questions and future research directions for TMC proteins are highlighted.