Glutaredoxin domain-containing cysteine-rich protein 2 (GRXCR2)

Glutaredoxin domain-containing cysteine-rich protein 2 (GRXCR2) is a protein essential for the morphogenesis of stereocilia bundles in cochlear hair cells, structures crucial for auditory function[1][3][5][6]. It contains a glutaredoxin domain and is implicated in protein S-glutathionylation, though direct enzyme activity in mammalian systems is unproven[1][3]. GRXCR2 ensures proper localization of taperin at the base of stereocilia, maintaining the structural integrity required for sound detection in the inner ear[1][5][6]. Mutations in GRXCR2 result in autosomal recessive nonsyndromic sensorineural deafness, specifically type DFNB101[1][3]. Currently, GRXCR2 is not considered a classical therapeutic target such as a receptor, enzyme, or transporter, but it represents an important molecular determinant in the genetic basis of hearing loss[3][6]. No drugs, mechanism of action for drug targeting, biomarkers, or safety concerns have been reported or established for this protein.

Other names

GRXCR2DFNB101Glutaredoxin and cysteine rich domain containing 2GRXCR1-like proteinGlutaredoxin domain-containing cysteine-rich protein 1-like proteinglutaredoxin, cysteine rich 2