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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

GNAZ in human fetal cochlea: expression, localization, and potential role in inner ear function.

Dissociation of an activated alpha-subunit from the beta-gamma complex directly regulates secondary messenger proteins. To address the potential role of G proteins expressed in human fetal cochlea, degenerate oligonucleotide primers corresponding to the 3'-end of the conserved region of alpha-subunits were used for polymerase chain reaction amplification of reverse-transcribed total human fetal cochlear mRNAs; GNAZ and GNAQ were isolated. These two G proteins are unique among the G-protein family because they lack a typical pertussis modification site. GNAZ is expressed in high levels in neural tissue while GNAQ is ubiquitously expressed. We characterized GNAZ expression using Northern blots, tissue in-situ hybridization and immunohistochemistry techniques to elucidate the potential role of this protein in inner ear function. Our data suggest that GNAZ may play a role in maintaining the ionic balance of perilymphatic and endolymphatic cochlear fluids.[1]


  1. GNAZ in human fetal cochlea: expression, localization, and potential role in inner ear function. Magovcevic, I., Khetarpal, U., Bieber, F.R., Morton, C.C. Hear. Res. (1995) [Pubmed]
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